BR24H08FVT-5AC [ROHM]
BR24H08xxx-5AC系列是支持I²C BUS接口的8KBit串行EEPROM。;
| 型号： | BR24H08FVT-5AC |
| 厂家： | 
ROHM |
| 描述： | BR24H08xxx-5AC系列是支持I²C BUS接口的8KBit串行EEPROM。 可编程只读存储器 电动程控只读存储器 电可擦编程只读存储器 |
| 文件： | 总41页 (文件大小：1654K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Datasheet
Serial EEPROM Series for Automotive EEPROM
125 °C Operation I2C BUS EEPROM
for Automotive (2-Wire)
BR24H08xxx-5AC Series
General Description
Key Specifications
BR24H08xxx-5AC Series is a 8 Kbit serial EEPROM of
◼ Write Cycles:
4 Million Times (Ta = 25 °C)
1.2 Million Times (Ta = 85 °C)
0.5 Million Times (Ta = 105 °C)
0.3 Million Times (Ta = 125 °C)
100 Years (Ta = 25 °C)
60 Years (Ta = 105 °C)
50 Years (Ta = 125 °C)
3.5 ms (Max)
I2C BUS Interface.
Features
◼ AEC-Q100 Qualified (Note 1)
◼ Data Retention:
◼ Functional Safety Supportive Automotive Products
◼ All Controls Available by 2 Ports of Serial Clock (SCL)
and Serial Data (SDA)
◼ 1.7 V to 5.5 V Wide Limit of Operating Voltage,
Possible 1 MHz Operation
◼ Write Cycle Time:
◼ Supply Voltage:
◼ Ambient Operating Temperature: -40 °C to +125 °C
1.7 V to 5.5 V
◼ Page Write Mode 16 Byte
Packages
SOP8
SOP-J8
TSSOP-B8
MSOP8
VSON08AX2030
W (Typ) x D (Typ) x H (Max)
5.0 mm x 6.2 mm x 1.71 mm
4.9 mm x 6.0 mm x 1.65 mm
3.0 mm x 6.4 mm x 1.2 mm
2.9 mm x 4.0 mm x 0.9 mm
2.0 mm x 3.0 mm x 0.6 mm
◼ Bit Format 1 K x 8 bit
◼ Low Current Consumption
◼ Prevention of Miswriting
➢ WP (Write Protect) Function Added
➢ Prevention of Miswriting at Low Voltage
◼ Noise Filter Built in SCL/SDA Pin
◼ Initial Delivery State FFh
(Note 1) Grade 1
Applications
◼ Automotive Camera
◼ Automotive Electronics
Typical Application Circuit
SOP8
SOP-J8
MSOP8
VCC
VCC
WP
A0
A1
*
VSON08AX2030
Micro-
controller
SCL
SDA
A2
GND
0.1 μF
TSSOP-B8
*Pins (A0, A1) not used as device address.
Connect A0, A1, A2 to VCC or GND.
These pins have pull-down elements inside the IC.
If pins are open, they are the same as when they
are connected to GND.
Figure 2
Figure 1. Typical Application Circuit
〇Product structure : Silicon integrated circuit 〇This product has no designed protection against radioactive rays.
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BR24H08xxx-5AC Series
Contents
General Description........................................................................................................................................................................1
Features..........................................................................................................................................................................................1
Applications ....................................................................................................................................................................................1
Typical Application Circuit ...............................................................................................................................................................1
Key Specifications ..........................................................................................................................................................................1
Packages........................................................................................................................................................................................1
Contents .........................................................................................................................................................................................2
Pin Configurations ..........................................................................................................................................................................3
Pin Description................................................................................................................................................................................3
Block Diagram ................................................................................................................................................................................3
Absolute Maximum Ratings ............................................................................................................................................................4
Thermal Resistance........................................................................................................................................................................4
Operating Conditions......................................................................................................................................................................6
Input/Output Capacitance...............................................................................................................................................................6
Input Impedance.............................................................................................................................................................................6
Memory Cell Characteristics...........................................................................................................................................................6
Electrical Characteristics.................................................................................................................................................................6
AC Characteristics..........................................................................................................................................................................7
AC Characteristics Condition..........................................................................................................................................................7
Input/Output Timing ........................................................................................................................................................................8
Typical Performance Curves.........................................................................................................................................................10
I2C BUS Communication...............................................................................................................................................................19
Write Command............................................................................................................................................................................20
Read Command............................................................................................................................................................................22
Method of Reset ...........................................................................................................................................................................23
Acknowledge Polling.....................................................................................................................................................................23
WP Valid Timing (Write Cancel)....................................................................................................................................................24
Command Cancel by Start Condition and Stop Condition ............................................................................................................24
Application Examples ...................................................................................................................................................................25
Caution on Power-Up Conditions..................................................................................................................................................27
Low Voltage Malfunction Prevention Function ..............................................................................................................................27
I/O Equivalence Circuits................................................................................................................................................................28
Operational Notes.........................................................................................................................................................................29
Ordering Information.....................................................................................................................................................................31
Lineup...........................................................................................................................................................................................31
Marking Diagrams.........................................................................................................................................................................32
Physical Dimension and Packing Information...............................................................................................................................33
Revision History............................................................................................................................................................................38
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BR24H08xxx-5AC Series
Pin Configurations
(TOP VIEW)
(TOP VIEW)
A0
VCC
8
1
2
3
4
8
7
6
5
A0
A1
1
2
3
4
VCC
WP
7 WP
A1
A2
6 SCL
A2
SCL
SDA
EXP-PAD
SDA
5
GND
GND
Figure 3-(a). Pin Configuration
(SOP8, SOP-J8, TSSOP-B8, MSOP8)
Figure 3-(b). Pin Configuration
(VSON08AX2030)
Pin Description
Pin No.
Pin Name
A0
Input/Output
Descriptions
Don’t use(Note 2)
Don’t use(Note 2)
1
2
3
4
5
6
7
8
-
-
A1
-
Slave address setting(Note 2)
Reference voltage of all input/output, 0 V
Serial data input / serial data output(Note 3)
Serial clock input
A2
Input
GND
SDA
SCL
-
Input/Output
Input
WP
Input
Write protect input(Note 4)
Connect to the power source
VCC
EXP-PAD
-
-
Leave as open or connect to GND
(Note 2) Connect to VCC or GND. There are pull-down elements inside the IC. If pin is open, this is the same as when this is connected to GND.
(Note 3) SDA is NMOS open drain, so it requires a pull-up resistor.
(Note 4) Connect to VCC or GND, or control to ‘HIGH’ level or ‘LOW’ level. There are pull-down elements inside the IC. If this pin is open, this input is recognized
as ‘LOW’.
Block Diagram
A0
1
2
8
VCC
8 Kbit EEPROM Array
8 bit
Address
Decoder
Data
Register
10 bit
Word Address
A1
A2
WP
7
6
5
Register
START
STOP
SCL
SDA
3
4
Control Circuit
ACK
High Voltage
Supply Voltage
Detection
GND
Generating Circuit
Figure 4. Block Diagram
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BR24H08xxx-5AC Series
Absolute Maximum Ratings
Parameter
Symbol
VCC
Rating
Unit
V
Remark
Ta = 25 °C
Supply Voltage
-0.3 to +6.5
Ta = 25 °C. The maximum value of input
voltage / output voltage is not over than 6.5 V.
When the pulse width is 50 ns or less, the
minimum value of input voltage / output voltage
is -1.0 V.
Input Voltage / Output Voltage
-
-0.3 to VCC+1.0
V
Electro Static Discharge
(Human Body Model)
Maximum Output Low Current
(SDA)
VESD
-4000 to +4000
10
V
Ta = 25 °C
IOLMAX
mA Ta = 25 °C
Maximum Junction Temperature
Tjmax
Tstg
150
°C
°C
-
-
Storage Temperature Range
-65 to +150
Caution 1: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is
operated over the absolute maximum ratings.
Caution 2: Should by any chance the maximum junction temperature rating be exceeded the rise in temperature of the chip may result in deterioration of the
properties of the chip. In case of exceeding this absolute maximum rating, design a PCB with thermal resistance taken into consideration by increasing
board size and copper area so as not to exceed the maximum junction temperature rating.
Thermal Resistance (Note 5)
Thermal Resistance (Typ)
Parameter
Symbol
Unit
1s(Note 7)
2s2p(Note 8)
SOP8
Junction to Ambient
Junction to Top Characterization Parameter(Note 6)
θJA
197.4
21
109.8
19
°C/W
°C/W
ΨJT
SOP-J8
149.3
18
76.9
11
Junction to Ambient
Junction to Top Characterization Parameter(Note 6)
θJA
°C/W
°C/W
ΨJT
TSSOP-B8
251.9
31
152.1
20
Junction to Ambient
Junction to Top Characterization Parameter(Note 6)
θJA
°C/W
°C/W
ΨJT
MSOP8
Junction to Ambient
Junction to Top Characterization Parameter(Note 6)
θJA
284.1
21
135.4
11
°C/W
°C/W
ΨJT
(Note 5) Based on JESD51-2A (Still-Air).
(Note 6) The thermal characterization parameter to report the difference between junction temperature and the temperature at the top center of the outside surface
of the component package.
(Note 7) Using a PCB board based on JESD51-3.
(Note 8) Using a PCB board based on JESD51-7.
Layer Number of
Measurement Board
Material
FR-4
Board Size
Single
114.3 mm x 76.2 mm x 1.57 mmt
Top
Copper Pattern
Thickness
70 μm
Footprints and Traces
Layer Number of
Measurement Board
Material
FR-4
Board Size
114.3 mm x 76.2 mm x 1.6 mmt
2 Internal Layers
4 Layers
Top
Copper Pattern
Bottom
Copper Pattern
74.2 mm x 74.2 mm
Thickness
70 μm
Copper Pattern
Thickness
35 μm
Thickness
70 μm
Footprints and Traces
74.2 mm x 74.2 mm
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BR24H08xxx-5AC Series
Thermal Resistance(Note 9) - continued
Thermal Resistance (Typ)
Parameter
Symbol
Unit
1s(Note 11)
2s2p(Note 12)
VSON08AX2030
299.5
42
77.8
18
Junction to Ambient
Junction to Top Characterization Parameter(Note 10)
θJA
°C/W
°C/W
ΨJT
(Note 9) Based on JESD51-2A (Still-Air).
(Note 10) The thermal characterization parameter to report the difference between junction temperature and the temperature at the top center of the outside
surface of the component package.
(Note 11) Using a PCB board based on JESD51-3.
(Note 12) Using a PCB board based on JESD51-5, 7.
Layer Number of
Measurement Board
Material
FR-4
Board Size
Single
114.3 mm x 76.2 mm x 1.57 mmt
Top
Copper Pattern
Thickness
70 μm
Footprints and Traces
Layer Number of
Measurement Board
Thermal Via(Note 13)
Material
FR-4
Board Size
114.3 mm x 76.2 mm x 1.6 mmt
2 Internal Layers
Pitch
Diameter
4 Layers
1.20 mm
Φ0.30 mm
Top
Copper Pattern
Bottom
Thickness
70 μm
Copper Pattern
Thickness
35 μm
Copper Pattern
Thickness
70 μm
Footprints and Traces
74.2 mm x 74.2 mm
74.2 mm x 74.2 mm
(Note 13) This thermal via connects with the copper pattern of all layers.
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BR24H08xxx-5AC Series
Operating Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Supply Voltage
VCC
Ta
C
1.7
-40
0.1
-
-
-
5.5
+125
-
V
Ambient Operating Temperature
Bypass Capacitor(Note 14)
°C
μF
(Note 14) Connect a bypass capacitor between the IC’s VCC and GND pins.
Input/Output Capacitance
(Ta = 25 °C
,
f = 1 MHz
)
Parameter
Symbol
Min
Typ
Max
8
Unit
pF
Conditions
Input/Output Capacitance
(SDA)(Note 15)
VI/O = GND
VIN = GND
CI/O
-
-
-
-
Input Capacitance
pF
CIN
8
(SCL, A0, A1, A2, WP)(Note 15)
(Note 15) Not 100 % Tested.
Input Impedance
Parameter
Input Impedance 1
Input Impedance 2
(
Unless otherwise specified, Ta = -40 °C to +125 °C
,
VCC = 1.7 V to 5.5 V)
Symbol
Min
Typ
Max
Unit
Conditions
ZIH
ZIL
500
30
-
-
-
-
kΩ
kΩ
0.7VCC ≤ VIN (A0, A1, A2, WP)
VIN ≤ 0.3VCC (A0, A1, A2, WP)
Memory Cell Characteristics (VCC = 1.7 V to 5.5 V)
Parameter
Symbol
Min
Typ
Max
Unit
Conditions
-
-
-
-
-
-
-
4,000,000
1,200,000
500,000
300,000
100
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Times Ta = 25 °C
Times Ta = 85 °C
Times Ta = 105 °C
Times Ta = 125 °C
Years Ta = 25 °C
Years Ta = 105 °C
Years Ta = 125 °C
Write Cycles(Note 16,17)
Data Retention(Note 16)
60
50
(Note 16) Not 100 % Tested.
(Note 17) The Write Cycles is defined for unit of 4 data bytes with the same page select bits and address bits of WA7 to WA2.
Electrical Characteristics
(Unless otherwise specified, Ta = -40 °C to +125 °C
,
VCC = 1.7 V to 5.5 V
)
Parameter
Symbol
Min
Typ
Max
Unit
Conditions
Input High Voltage
Input Low Voltage
VIH
VIL
0.7VCC
-0.3(Note 18)
-
-
VCC+1.0
+0.3VCC
V
V
-
-
IOL = 3.2 mA, 2.5 V ≤ VCC ≤ 5.5 V
(SDA)
IOL = 1.0 mA, 1.7 V ≤ VCC < 2.5 V
(SDA)
VIN = 0 V or VCC (A0, A1, A2, WP)
Standby Mode
Output Low Voltage 1
Output Low Voltage 2
Input Leakage Current 1
VOL1
VOL2
ILI1
-
-
-
-
-
0.4
0.2
+2
V
V
-2
μA
Input Leakage Current 2
Output Leakage Current
ILI2
ILO
-2
-2
-
-
+2
+2
μA
μA
VIN = 0 V to VCC (SCL)
VOUT = 0 V to VCC (SDA)
VCC = 5.5 V, fSCL = 1 MHz,
tWR = 3.5 ms
Supply Current (Write)(Note 19)
ICC1
-
-
1.7
mA
Byte Write, Page Write
VCC = 5.5 V, fSCL = 1 MHz
Random Read, Current Read,
Sequential Read
VCC = 5.5 V, SDA, SCL = VCC
A0, A1, A2, WP = 0 V
Supply Current (Read)(Note 19)
Standby Current
ICC2
ISB
-
-
-
-
2.0
10
mA
μA
(Note 18) When the pulse width is 50 ns or less, it is -1.0 V.
(Note 19) The average value during operation.
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BR24H08xxx-5AC Series
AC Characteristics (Unless otherwise specified, Ta = -40 °C to +125 °C, VCC = 1.7 V to 5.5 V)
Parameter
Symbol
Min
Typ
Max
Unit
Clock Frequency
fSCL
tHIGH
tLOW
tR
-
260
500
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
μs
μs
μs
Data Clock High Period
Data Clock Low Period
SDA, SCL (input) Rise Time(Note 20)
SDA, SCL (input) Fall Time(Note 20)
SDA (output) Fall Time(Note 20)
Start Condition Hold Time
Start Condition Setup Time
Input Data Hold Time
-
-
120
tF1
-
120
tF2
-
120
tHD:STA
tSU:STA
tHD:DAT
tSU:DAT
tPD
250
200
0
-
-
-
Input Data Setup Time
Output Data Delay Time
Output Data Hold Time
Stop Condition Setup Time
Bus Free Time
50
50
50
250
500
-
-
450
tDH
-
-
tSU:STO
tBUF
-
Write Cycle Time
tWR
3.5
50
-
Noise Suppression Time (SCL, SDA)
WP Hold Time
tI
-
tHD:WP
tSU:WP
tHIGH:WP
1.0
0.1
1.0
WP Setup Time
-
WP High Period
-
(Note 20) Not 100 % Tested.
AC Characteristics Condition
Parameter
Symbol
Conditions
Unit
Load Capacitance
Input Rise Time
Input Fall Time
CL
tR
100
20
pF
ns
ns
V
tF1
VIH
VIL
-
20
0.8VCC
0.2VCC
0.3VCC/0.7VCC
Input Voltage
V
Input/Output Data Timing Reference Level
V
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BR24H08xxx-5AC Series
Input/Output Timing
tR
tHIGH
tF1
70 %
30 %
SCL
tHD:STA
70 %
tBUF
tHD:DAT
tLOW
tSU:DAT
SDA
(input)
30 %
tDH
tPD
70 %
30 %
SDA
(output)
tF2
○Input read at the rise edge of SCL
○Data output in sync with the fall of SCL
Figure 5-(a). Input/Output Timing
70 %
SCL
SDA
tSU:STO
tSU:STA
tHD:STA
70 %
30 %
START condition
STOP condition
Figure 5-(b). Start-Stop Condition Timing
SCL
SDA
70 %
ACK
D0
tWR
write data
(n-th address)
STOP condition
START condition
Figure 5-(c). Write Cycle Timing
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BR24H08xxx-5AC Series
Input/Output Timing - continued
70 %
SCL
DATA(n)
DATA(1)
D0
D1
70 %
70 %
ACK
ACK
SDA
WP
tWR
30 %
tSU:WP
tHD:WP
STOP condition
Figure 5-(d). WP Timing at Write Execution
SCL
DATA(n)
DATA(1)
D0
D1
70 %
tWR
ACK
ACK
SDA
WP
tHIGH:WP
70 %
Figure 5-(e). WP Timing at Write Cancel
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BR24H08xxx-5AC Series
Typical Performance Curves
6
6
5
4
3
2
1
0
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
5
4
3
2
1
0
SPEC
SPEC
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 6. Input High Voltage vs Supply Voltage
Figure 7. Input Low Voltage vs Supply Voltage
1.0
0.8
0.6
0.4
0.2
0.0
1.0
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
0.8
0.6
SPEC
0.4
SPEC
0.2
0.0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Output Low Current: IOL [mA]
Output Low Current: IOL [mA]
Figure 8. Output Low Voltage 1 vs Output Low Current
(VCC = 2.5 V)
Figure 9. Output Low Voltage 2 vs Output Low Current
(VCC = 1.7 V)
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BR24H08xxx-5AC Series
Typical Performance Curves - continued
2.5
2.0
1.5
1.0
0.5
0.0
2.5
SPEC
SPEC
2.0
1.5
1.0
0.5
0.0
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Input Voltage: VIN [V]
Input Voltage: VIN [V]
Figure 10. Input Leakage Current 1 vs Input Voltage
(Standby Mode)
Figure 11. Input Leakage Current 2 vs Input Voltage
2.0
2.5
SPEC
SPEC
2.0
1.5
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
1.5
1.0
0.5
0.0
1.0
0.5
0.0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Output Voltage: VOUT [V]
Figure 12. Output Leakage Current vs Output Voltage
Figure 13. Supply Current (Write) vs Supply Voltage
(fSCL = 1 MHz)
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BR24H08xxx-5AC Series
Typical Performance Curves - continued
12
10
8
2.5
SPEC
SPEC
2.0
1.5
1.0
0.5
0.0
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
6
4
2
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 14. Supply Current (Read) vs Supply Voltage
(fSCL = 1 MHz)
Figure 15. Standby Current vs Supply Voltage
10.0
300
250
200
150
100
50
SPEC
SPEC
1.0
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
0.1
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 16. Clock Frequency vs Supply Voltage
Figure 17. Data Clock High Period vs Supply Voltage
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BR24H08xxx-5AC Series
Typical Performance Curves - continued
600
140
120
100
80
SPEC
SPEC
500
400
300
200
100
0
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
60
40
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
20
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 18. Data Clock Low Period vs Supply Voltage
Figure 19. SDA (output) Fall Time vs Supply Voltage
300
250
SPEC
SPEC
250
200
Ta = -40 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = +25 °C
Ta = +125 °C
200
150
150
100
50
0
100
50
0
-50
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 20. Start Condition Hold Time vs Supply Voltage
Figure 21. Start Condition Setup Time vs Supply Voltage
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BR24H08xxx-5AC Series
Typical Performance Curves - continued
50
0
50
SPEC
SPEC
0
-50
-50
-100
-150
-100
-150
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 22. Input Data Hold Time vs Supply Voltage
(SDA ‘LOW’ to ‘HIGH’)
Figure 23. Input Data Hold Time vs Supply Voltage
(SDA ‘HIGH’ to ‘LOW’)
60
60
SPEC
SPEC
50
50
Ta = -40 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = +25 °C
Ta = +125 °C
40
40
30
20
10
0
30
20
10
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 24. Input Data Setup Time vs Supply Voltage
(SDA ‘LOW’ to ‘HIGH’)
Figure 25. Input Data Setup Time vs Supply Voltage
(SDA ‘HIGH’ to ‘LOW’)
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BR24H08xxx-5AC Series
Typical Performance Curves - continued
500
500
400
300
200
100
0
SPEC
SPEC
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
400
300
200
100
0
SPEC
SPEC
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 26. Output Data Delay Time vs Supply Voltage
(SDA ‘LOW’ to ‘HIGH’)
Figure 27. Output Data Delay Time vs Supply Voltage
(SDA ‘HIGH’ to ‘LOW’)
500
500
Ta = -40 °C
Ta = +25 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = +125 °C
400
400
300
200
100
300
200
100
SPEC
SPEC
0
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 28. Output Data Hold Time vs Supply Voltage
(SDA ‘LOW’ to ‘HIGH’)
Figure 29. Output Data Hold Time vs Supply Voltage
(SDA ‘HIGH’ to ‘LOW’)
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BR24H08xxx-5AC Series
Typical Performance Curves - continued
600
500
400
300
200
100
0
300
SPEC
SPEC
250
200
150
100
50
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 30. Stop Condition Setup Time vs Supply Voltage
Figure 31. Bus Free Time vs Supply Voltage
200
150
100
50
4
SPEC
3
2
1
SPEC
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
0
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 32. Write Cycle Time vs Supply Voltage
Figure 33. Noise Suppression Time vs Supply Voltage
(SCL ‘HIGH’)
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BR24H08xxx-5AC Series
Typical Performance Curves - continued
200
150
100
50
200
150
100
50
SPEC
SPEC
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
0
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 34. Noise Suppression Time vs Supply Voltage
(SCL ‘LOW’)
Figure 35. Noise Suppression Time vs Supply Voltage
(SDA ‘HIGH’)
200
150
100
50
1.2
SPEC
1.0
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
0.8
0.6
0.4
0.2
0.0
SPEC
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 36. Noise Suppression Time vs Supply Voltage
(SDA ‘LOW’)
Figure 37. WP Hold Time vs Supply Voltage
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BR24H08xxx-5AC Series
Typical Performance Curves - continued
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.2
SPEC
0.1
0.0
SPEC
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
Ta = -40 °C
Ta = +25 °C
Ta = +125 °C
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Supply Voltage: VCC [V]
Supply Voltage: VCC [V]
Figure 38. WP Setup Time vs Supply Voltage
Figure 39. WP High Period vs Supply Voltage
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BR24H08xxx-5AC Series
I2C BUS Communication
1. I2C BUS Data Communication
(1) I2C BUS data communication begins with start condition input, and ends at the stop condition input.
(2) The data is always 8 bit long, and acknowledge is always required after each byte.
(3) I2C BUS data communication with several devices connected to the BUS is possible by connecting with 2
communication lines: serial data (SDA) and serial clock (SCL).
(4) Among the devices, there is a “master” that generates clock and controls communication start and end. The rest is
“slave” which are controlled by an address peculiar to each device. EEPROM is a “slave”.
(5) The device that outputs data to the bus during data communication is called the “transmitter”, and the device that
receives data is called the “receiver”.
SDA
1 to 7
1 to 7
1 to 7
8
9
8
9
8
9
SCL
P
S
START
ADDRESS
R/W
ACK
DATA
ACK
DATA
ACK
STOP
condition
condition
Figure 40. Data Transfer Timing
2. Start Condition (Start Bit Recognition)
(1) Before executing each command, start condition (start bit) that SDA goes down from ‘HIGH’ to ‘LOW’ while SCL is
‘HIGH’ is necessary.
(2) This IC always detects whether SDA and SCL are in start condition (start bit) or not, therefore, unless this condition
is satisfied, any command cannot be executed.
3. Stop Condition (Stop Bit Recognition)
Each command can be ended by a stop condition (stop bit) that SDA goes from ‘LOW’ to ‘HIGH’ while SCL is ‘HIGH’.
4. Acknowledge (ACK) Signal
(1) The acknowledge (ACK) signal is a software rule to indicate whether or not data transfer was performed normally. In
both master and slave communication, the device at the transmitter (sending) side releases the bus after outputting
8-bit data. When a slave address of a write command or a read command is input, microcontroller is the device at the
transmitter side. When data output for a read command, this IC is the device at the transmitter side.
(2) The device on the receiver (receiving) side sets SDA ‘LOW’ during the 9th clock cycle, and outputs an ACK signal
showing that the 8-bit data has been received. When a slave address of a write command or a read command is
input, this IC is the device at the receiver side. When data output for a read command, microcontroller is the device
at the receiver side.
(3) This IC outputs ACK signal ‘LOW’ after recognizing start condition and slave address (8 bit).
(4) Each write operation outputs ACK signal ‘LOW’ every 8-bit data (a word address and write data) reception.
(5) During read operation, this IC outputs 8-bit data (read data) and detects the ACK signal ‘LOW’. When ACK signal is
detected, and no stop condition is sent from the master (microcontroller) side, this IC continues to output data. If the
ACK signal is not detected, this IC stops data transfer, recognizes the stop condition (stop bit), and ends the read
operation. Then this IC is ready for another transmission.
5. Device Addressing
(1) From the master, input the slave address after the start condition.
(2) The significant 4 bits of slave address are used for recognizing a device type.
The device code of this IC is fixed to ‘1010’.
(3) The next slave address (A2--- device address) is for selecting devices, and multiple devices can be used on a same
bus according to the number of device addresses. It is possible to select and operate only EEPROM that has matched
the ‘VCC’ and ‘GND’ input conditions of the A2 pin and the ‘HIGH’ and ‘LOW’ inputs of slave address sent from the
master.
P1, P0 are the page select bit.
(4) The least significant bit (R / W --- READ/ WRITE ) of slave address is used for designating write or read operation,
and is as shown below.
Setting R/ W to 0 ------- write (setting 0 to word address setting of random read)
Setting R/ W to 1 ------- read
Maximum number of
Slave address
Connected buses
2
1
0
1
0 A2 P1 P0 R/ W
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BR24H08xxx-5AC Series
Write Command
1. Write
(1) Write commands can be used to write data to EEPROM. Write can be Byte Write or Page Write. When only 1 byte is
to be written, use Byte Write. When 2 or more bytes of continuous data are written, up to 16 bytes can be written
simultaneously by Page Write.
SLAVE
ADDRESS
WORD
ADDRESS (n)
WRITE
START
DATA (n)
STOP
SDA
LINE
WA
7
WA
0
1
0
1
0 A2 P1P0
R/W
D7
D0
ACK
ACK
ACK
Figure 41. Byte Write
SLAVE
ADDRESS
WORD
ADDRESS (n)
WRITE
START
DATA (n)
DATA (n + 15)
STOP
SDA
LINE
WA
7
WA
0
D0
1
0
1
0 A2P1P0
R/W
D7
D0
ACK
ACK
ACK
ACK
Figure 42. Page Write
(2) During write execution, all input commands are ignored, therefore ACK is not returned.
(3) Data is written to the address (n-th address) specified by the page select bit and word address.
(4) By issuing stop bit after 8 bit data input, write to memory cell starts.
(5) When write is started, command is not accepted for tWR (3.5 ms at maximum).
(6) For Page Write, after the address (n-th address) is specified with the page select bit and word address, then 2 bytes
or more data are input in succession, the lower 4 bits of the word address are incremented inside EEPROM, and up
to 16 bytes of data can be written from the specified address (n-th address).
(7) When the data exceeding the maximum number of bytes is sent in Page Write, the data of the first byte is overwritten
in order.
(Refer to "Internal Address Increment".)
(8) When VCC is turned off during write execution, data at the designated address is not guaranteed, please write it again.
1 page = 16 bytes, but the write time of page write is 3.5 ms at maximum for 16 byte batch write.
It is not equal to 3.5 ms at maximum x 16 byte = 56 ms (Max).
2. Internal Address Increment During Page Write
WA7 WA6 WA5 WA4 WA3 WA2 WA1 WA0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
Increment
For example, when starting from address 0Eh, then,
0Eh→0Fh→00h→01h···. Please take note that it is
incremented.
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
1
1
0
1
1
0
0
1
0
0Eh
*0Eh···0E in hexadecimal, therefore, 00001110 is a binary
number.
Significantbit is fixed.
No digitup
3. Write Protect (WP) Function
When the WP pin is set at VCC (‘HIGH’ level), data rewrite of all addresses is prohibited. When it is set GND (‘LOW’ level),
data rewrite of all address is enabled. Be sure to connect this pin to VCC or GND, or control it to ‘HIGH’ level or ‘LOW’
level. If the WP pin is open, this input is recognized as ‘LOW’.
In case of using it as ROM, by connecting it to pull-up or VCC, write error can be prevented.
At extremely low voltage at power ON/OFF, by setting the WP pin ‘HIGH’, write error can be prevented.
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BR24H08xxx-5AC Series
Write Command - continued
4. ECC Function
This IC has ECC bits for Error Correction every 4 bytes. These 4 bytes are same for page select bits and address bits of
WA7 to WA2. In read operation, if error data of 1 bit exists in 4 bytes, this error data is corrected by the ECC function
and outputs the correct data. In write operation, only data of 1 byte is written, 4 bytes of data is written as one group (the
data to be written in the remaining 3 bytes is the same as its previous stored data). Therefore, the number of write cycle
times is guaranteed every 4 bytes.
Initial Delivery State
Address
Number of Remaining
Write Cycles
0000h
4 Million
Times
0001h
4 Million
Times
0002h
4 Million
Times
0003h
4 Million
Times
0004h
4 Million
Times
0005h
4 Million
Times
···
···
After 1 Million Times using Byte Write in Address 0000h
Address
Number of Remaining
Write Cycles
0000h
3 Million
Times
0001h
3 Million
Times
0002h
3 Million
Times
0003h
3 Million
Times
0004h
4 Million
Times
0005h
4 Million
Times
···
···
Even if only 1 byte of data is to be written in address 0000h,
the addresses 0000h to 0003h are written as one group.
Therefore, the number of write cycle times at addresses 0001h to 0003h decreases.
Figure 43. Example of Data Write and Number of Remaining Write Cycles
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BR24H08xxx-5AC Series
Read Command
Read commands can be used to read the EEPROM data. Read has a random read and a current read functions. Random
read is commonly used in commands that specify addresses and read data. The current read is a command to read data
of the internal address register without specifying an address. In both read functions, sequential read is possible that the
next address data can be read in succession.
SLAVE
ADDRESS
WORD
ADDRESS (n)
SLAVE
ADDRESS
START
DATA (n)
STOP
START
WRITE
READ
SDA
LINE
WA
7
WA
0
A2P1P0
A2 *
*
1 0 1 0
1 0
D7
D0
1 0
ACK
* Don’t Care bit
ACK
R/W ACK
ACK
R/W
Figure 44. Random Read
SLAVE
ADDRESS
STOP
START
DATA (n)
READ
*
SDA
LINE
1 0 1 0
D7
D0
A2 *
ACK
ACK
* Don’t Care bit
R/W
Figure 45. Current Read
SLAVE
START ADDRESS
READ
*
DATA (n)
DATA (n + x)
STOP
SDA
LINE
A2 *
1 0 1 0
D7
D0
D7
D0
ACK
* Don’t Care bit
ACK
R/W ACK
Figure 46. Sequential Read (in the Case of Current Read)
(1) In random read, data of designated word address can be read.
ACK
(2) When the command just before current read is random read or current read (each including sequential read), If last
read address is (n)-th, data of the incremented address (n + 1)-th is outputted.
(3) When ACK signal ‘LOW’ is detected after D0, and stop condition is not sent from master (microcontroller) side, the
next address data can be read in succession.
(4) Read is ended by stop condition that ‘HIGH’ is input to ACK signal after D0 and SDA signal goes from ‘LOW’ to ‘HIGH’
while at SCL signal is ‘HIGH’.
(5) When ‘LOW’ is input at ACK signal after D0 without ‘HIGH’ input, sequential read gets in, and the next data is outputted.
Therefore, read command cannot be ended. To end read command, be sure to input ‘HIGH’ to ACK signal after D0,
and the stop condition that SDA goes from ‘LOW’ to ‘HIGH’ while SCL signal is ‘HIGH’.
(6) Sequential read is ended by stop condition that ‘HIGH’ is input to ACK signal after arbitrary D0 and SDA goes from
‘LOW’ to ‘HIGH’ while SCL signal is ‘HIGH’.
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BR24H08xxx-5AC Series
Method of Reset
This IC is equipped with Power-on Reset circuit, which is described later, and is reset at power-up. Also, by continuously input
start condition and stop condition, reset can be done without restarting the power supply. Execute the reset by start condition
and stop condition when it is necessary to reset after power-up, or during command input timing. However, the start condition
and stop condition could not be applied because ‘HIGH’ input of microcontroller and ‘LOW’ output of EEPROM collide when
EEPROM is ‘LOW’ in ACK output section and data reading. In that case, input SCL clock until SDA bus is released (‘HIGH’
by pull-up). After confirming that SDA bus is released, continuously input start condition and stop condition. If SDA bus could
not be confirmed whether released or not in microcontroller, input the software reset. If software reset is run, EEPROM can
be reset without confirming the SDA state because SDA bus is always released in either of the two start conditions. The
method of reset is shown in the table below.
Status of SDA
Method of Reset
SDA bus released
(‘HIGH’ by pull-up)
Continuously input start condition and stop condition.
Input SCL clock until SDA bus is released. After confirm that SDA bus is released,
continuously input start condition and stop condition.
‘LOW’
Microcontroller cannot
confirm if SDA bus is
released or not
Using the software reset shown in the figure below, the start condition can be always inputed.
Within the dummy clock input area, the SDA bus is needed to be released. For normal
commands, start with the start condition input.
Start
Dummy clock × 9
Start Stop
1
2
Normal command
Normal command
SCL
SDA
8
9
Figure 47. Input Timing of Software Reset
Acknowledge Polling
During write execution, all input commands are ignored, therefore ACK is not returned. During write execution after write input,
next command (slave address) is sent. If the first ACK signal sends back ‘LOW’, then it means end of write operation, else
‘HIGH’ is returned, which means writing is still in progress. By the use of acknowledge polling, next command can be executed
without waiting for tWR = 3.5 ms.
To write continuously, slave address with R/ W = 0, then to carry out current read after write, slave address with R/ W = 1
is sent. If ACK signal sends back ‘LOW’, then execute word address input and data output and so forth.
During write execution,
ACK = HIGH is returned.
First write command
START
START
START
STOP
Slave
Address
Slave
Address
Write Command
···
ACK
= HIGH
ACK
= HIGH
tWR
Second write command
START
STOP
START
Slave
Word
Slave
Address
···
Data
Address
Address
ACK
= HIGH
ACK
= LOW
ACK
= LOW
ACK
= LOW
tWR
After completion of write execution, ACK = LOW is returned,
so input next word address and data in succession.
Figure 48. The Case of Continuous Write by Acknowledge Polling
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BR24H08xxx-5AC Series
WP Valid Timing (Write Cancel)
WP is usually fixed to ‘HIGH’ or ‘LOW’, but when WP is controlled and used for write cancel and so on, pay attention to the
following WP valid timing. Write can be cancelled by setting WP = ‘HIGH’ while it is executed and in WP valid area. In both
byte write and page write, the area from the first start condition of command to the rise of clock which take in D0 of data (in
page write, the first byte data) is the WP invalid area. WP input in this area is ‘Don’t care’. The area from the rise of clock to
take in D0 to the stop condition input is the WP valid area. Furthermore, after the execution of forced end by WP, the IC enters
standby status.
·Rise of SDA
·Rise of D0 taken clock
SCL
SCL
SDA
D1
SDA
D0 ACK
ACK
D0
Enlarged view
Enlarged view
STOP
START
tWR
Slave
Address
Word
D6
D4
D3 D2
D7
D5
SDA
D1 D0
Data
Address
ACK
= LOW
ACK
= LOW
ACK
= LOW
ACK
= LOW
WP Invalid Area
WP Valid Area
WP Invalid Area
If WP = ‘HIGH’ in this area,
data is not written
WP
Figure 49. WP Valid Timing
Command Cancel by Start Condition and Stop Condition
During command input, by continuously inputting start condition and stop condition, command can be cancelled. However,
within ACK output area and during data read, SDA bus may output ‘LOW’. In this case, start condition and stop condition
cannot be inputted, so reset is not available. Therefore, execution of reset is needed referring “Method of Reset”. When
command is cancelled by start-stop condition during random read, sequential read, or current read, internal address setting
is not determined. Therefore, it is not possible to carry out current read in succession. To carry out read in succession, carry
out random read.
SCL
1
0
1
0
SDA
Start
Stop
Condition Condition
Figure 50. The Case of Cancel by Start, Stop Condition during Slave Address Input
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BR24H08xxx-5AC Series
Application Examples
1. I/O Peripheral Circuit
(1) Pull-up Resistance of the SDA Pin
SDA is NMOS open drain, so it requires a pull-up resistor. As for this resistor value (RPU), select an appropriate value
from microcontroller VIL, IL, and VOL-IOL characteristics of this IC. If RPU is large, operating frequency is limited. The smaller
the RPU increases the supply current.
(2) Maximum Value of RPU
The maximum value of RPU is determined by the following factors.
(a) SDA rise time determined by the capacitance (CBUS) of bus line of SDA and RPU should be tR or lower. Furthermore,
AC timing should be satisfied even when SDA rise time is slow.
(b) The bus electric potential A to be determined by input current leak total (IL) of the device connected to bus at output
of ‘HIGH’ to SDA line and RPU should sufficiently secure the input ‘HIGH’ level (VIH) of microcontroller and EEPROM
including recommended noise margin of 0.2VCC
.
VCC
RPU
Microcontroller
푉퐶퐶 − 퐼퐿푅푃푈 − 0.2푉퐶퐶 ≥ 푉
EEPROM
SDA Pin
ꢀ퐻
IL
0.8푉퐶퐶 − 푉
ꢀ퐻
∴ 푅푃푈
≤
A
퐼퐿
IL1
IL2
E.g.) VCC = 3 V, IL = 10 μA, VIH = 0.7VCC
from (b)
CBUS
0.8 × 3 − 0.7 × 3
∴ 푅푃푈
≤
10 × 10ꢁ6
Figure 51. I/O Circuit Diagram
≤ 30 [kΩ]
(3) Minimum Value of RPU
The minimum value of RPU is determined by the following factors.
(a) When IC outputs ‘LOW’, the bus electric potential A should be equal to or less than output ‘LOW’ level (VOL) of
EEPROM.
푉퐶퐶 − 푉푂퐿
≤ 퐼푂퐿
푅푃푈
푉퐶퐶 − 푉푂퐿
∴ 푅푃푈
≥
퐼푂퐿
E.g.) VCC = 3 V, VOL = 0.4 V, IOL = 3.2 mA, microcontroller, EEPROM VIL = 0.3VCC
3 − 0.4
3.2 × 10ꢁꢂ
∴ 푅푃푈
≥
≥ 812.5 [Ω]
(4) Pull-up Resistance of the SCL Pin
When SCL control is made at the CMOS output port, there is no need for a pull-up resistor. But when there is a time that
SCL becomes ‘Hi-Z’, add a pull-up resistor. As for the pull-up resistor value, decide with the balance with drive
performance of output port of microcontroller.
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BR24H08xxx-5AC Series
Application Examples - continued
2. Cautions on Microcontroller Connection
(1) RS
In I2C BUS, it is recommended that SDA port is open drain input/output. However, when using CMOS input/output of tri
state to SDA port, insert a series resistance RS between the pull-up resistor RPU and the SDA pin of EEPROM. This is to
control over current that may occur when PMOS of the microcontroller and NMOS of EEPROM are turned ON
simultaneously. RS also plays the role of protecting the SDA pin against surge. Therefore, even when SDA port is open
drain input/output, RS can be used.
ACK
VCC
SCL
RPU
RS
SDA
‘HIGH’ output
of microcontroller
‘LOW’ output of EEPROM
Microcontroller
EEPROM
Over current flows to SDA line by
‘HIGH’ output of microcontroller and ‘LOW’ output of EEPROM.
Figure 52. I/O Circuit Diagram
(2) Maximum Value of RS
Figure 53. I/O Collision Timing
The maximum value of RS is determined by the following relations.
(a) SDA rise time determined by the capacitance (CBUS) of bus line of SDA and RPU should be tR or lower. Furthermore,
AC timing should be satisfied even when SDA rise time is slow.
(b) The bus electric potential A to be determined by RPU and RS when EEPROM outputs ‘LOW’ to SDA bus should
sufficiently secure the input ‘LOW’ level (VIL) of microcontroller including recommended noise margin of 0.1VCC
.
(
)
푉퐶퐶 − 푉푂퐿 × 푅푆
VCC
+ 푉푂퐿 + 0.1푉퐶퐶 ≤ 푉
ꢀ퐿
푅푃푈 + 푅푆
A
RPU
RS
VOL
푉 − 푉푂퐿 − 0.1푉퐶퐶
ꢀ퐿
IOL
∴ 푅푆 ≤
× 푅푃푈
1.1푉퐶퐶 − 푉
ꢀ퐿
CBUS
E.g.) VCC = 3 V, VIL = 0.3VCC, VOL = 0.4 V, RPU = 20 kΩ
VIL
EEPROM
Microcontroller
0.3 × 3 − 0.4 − 0.1 × 3
푅푆 ≤
× 20 × 10ꢂ
Figure 54. I/O Circuit Diagram
1.1 × 3 − 0.3 × 3
≤ 1.ꢃ7 [kΩ]
(3) Minimum Value of RS
The minimum value of RS is determined by over current at bus collision. When over current flows, noises in power source
line and instantaneous power failure of power source may occur. When allowable over current is defined as I, the
following relation must be satisfied. Determine the allowable current in consideration of the impedance of power source
line in set and so forth.
푉퐶퐶
VCC
≤ 퐼
푅푆
RPU
'LOW'
output
푉퐶퐶
퐼
S
R
∴ 푅푆 ≥
Over current I
'HIGH'
output
E.g.) VCC = 3 V, I = 10 mA
3
푅푆 ≥
10 × 10ꢁꢂ
Microcontroller
EEPROM
≥ 300 [Ω]
Figure 55. I/O Circuit Diagram
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BR24H08xxx-5AC Series
Caution on Power-Up Conditions
At power-up, as the VCC rises, the IC’s internal circuits may go through unstable low voltage area, making the IC’s internal
circuit not completely reset, hence, malfunction like miswriting and misreading may occur. To prevent it, this IC is equipped
with Power-on Reset circuit. In order to ensure its operation, at power-up, please observe the conditions below. In addition,
set the power supply rise so that the supply voltage constantly increases from VBOT to VCC level. Furthermore, tINIT is the time
from the power becomes stable to the start of the first command input.
tR:VCC tINIT
VCC
tPOFF
Command
start
VCC (Min)
VBOT
0 V
Figure 56. Rise Waveform Diagram
Power-Up Conditions
Parameter
Symbol
VBOT
Min
-
Typ
Max
0.3
-
Unit
V
Supply Voltage at Power OFF
Power OFF Time(Note 21)
Initialize Time(Note 21)
-
-
-
-
tPOFF
tINIT
1
ms
ms
ms
0.1
0.001
-
Supply Voltage Rising Time(Note 21)
tR:VCC
100
(Note 21) Not 100 % Tested.
If the above conditions are not followed, the POR circuit does not operate properly, the logic circuit of internal IC is undefined.
At this time, there is a possibility that IC may not be able to input commands because EEPROM may output ‘LOW’ and it
collide with ‘HIGH’ input of microcontroller. However, SDA bus can be released by resetting the IC. Refer to the page “Method
of Reset” for reset details.
Low Voltage Malfunction Prevention Function
LVCC circuit prevents data rewrite operation at low power, and prevents write error. At LVCC voltage (Typ = 1.2 V) or below,
data rewrite is prevented.
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BR24H08xxx-5AC Series
I/O Equivalence Circuits
1. Input (A0, A1, A2, WP)
Pull-down elements
Figure 57. Input Pin Circuit Diagram (A0, A1, A2, WP)
2. Input (SCL)
Figure 58. Input Pin Circuit Diagram (SCL)
3. Input/Output (SDA)
Figure 59. Input/Output Pin Circuit Diagram (SDA)
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BR24H08xxx-5AC Series
Operational Notes
1. Reverse Connection of Power Supply
Connecting the power supply in reverse polarity can damage the IC. Take precautions against reverse polarity when
connecting the power supply, such as mounting an external diode between the power supply and the IC’s power supply
pins.
2. Power Supply Lines
Design the PCB layout pattern to provide low impedance supply lines. Furthermore, connect a capacitor to ground at
all power supply pins. Consider the effect of temperature and aging on the capacitance value when using electrolytic
capacitors.
3. Ground Voltage
Ensure that no pins are at a voltage below that of the ground pin at any time, even during transient condition.
4. Ground Wiring Pattern
When using both small-signal and large-current ground traces, the two ground traces should be routed separately but
connected to a single ground at the reference point of the application board to avoid fluctuations in the small-signal
ground caused by large currents. Also ensure that the ground traces of external components do not cause variations
on the ground voltage. The ground lines must be as short and thick as possible to reduce line impedance.
5. Operating Conditions
The function and operation of the IC are guaranteed within the range specified by the operating conditions. The
characteristic values are guaranteed only under the conditions of each item specified by the electrical characteristics.
6. Inrush Current
When power is first supplied to the IC, it is possible that the internal logic may be unstable and inrush current may flow
instantaneously due to the internal powering sequence and delays, especially if the IC has more than one power supply.
Therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing
of connections.
7. Testing on Application Boards
When testing the IC on an application board, connecting a capacitor directly to a low-impedance output pin may subject
the IC to stress. Always discharge capacitors completely after each process or step. The IC’s power supply should
always be turned off completely before connecting or removing it from the test setup during the inspection process. To
prevent damage from static discharge, ground the IC during assembly and use similar precautions during transport and
storage.
8. Inter-pin Short and Mounting Errors
Ensure that the direction and position are correct when mounting the IC on the PCB. Incorrect mounting may result in
damaging the IC. Avoid nearby pins being shorted to each other especially to ground, power supply and output pin.
Inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and
unintentional solder bridge deposited in between pins during assembly to name a few.
9. Unused Input Pins
Input pins of an IC are often connected to the gate of a MOS transistor. The gate has extremely high impedance and
extremely low capacitance. If left unconnected, the electric field from the outside can easily charge it. The small charge
acquired in this way is enough to produce a significant effect on the conduction through the transistor and cause
unexpected operation of the IC. So unless otherwise specified, unused input pins should be connected to the power
supply or ground line.
10. Regarding the Input Pin of the IC
In the construction of this IC, P-N junctions are inevitably formed creating parasitic diodes or transistors. The operation
of these parasitic elements can result in mutual interference among circuits, operational faults, or physical damage.
Therefore, conditions which cause these parasitic elements to operate, such as applying a voltage to an input pin lower
than the ground voltage should be avoided. Furthermore, do not apply a voltage to the input pins when no power supply
voltage is applied to the IC. Even if the power supply voltage is applied, make sure that the input pins have voltages
within the values specified in the electrical characteristics of this IC.
11. Ceramic Capacitor
When using a ceramic capacitor, determine a capacitance value considering the change of capacitance with
temperature and the decrease in nominal capacitance due to DC bias and others.
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BR24H08xxx-5AC Series
Operational Notes – continued
12. Functional Safety
“ISO 26262 Process Compliant to Support ASIL-*”
A product that has been developed based on an ISO 26262 design process compliant to the ASIL level described in the
datasheet.
“Safety Mechanism is Implemented to Support Functional Safety (ASIL-*)”
A product that has implemented safety mechanism to meet ASIL level requirements described in the datasheet.
“Functional Safety Supportive Automotive Products”
A product that has been developed for automotive use and is capable of supporting safety analysis with regard to the
functional safety.
Note: “ASIL-*” is stands for the ratings of “ASIL-A”, “-B”, “-C” or “-D” specified by each product's datasheet.
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BR24H08xxx-5AC Series
Ordering Information
B
R
2
4
H
0
8
x
x
x
x
-
5
A
C
x
x
BUS Type
24: I2C
Ambient Operating Temperature
/ Supply Voltage
-40 °C to +125 °C
/ 1.7 V to 5.5 V
Capacity
08 = 8 Kbit
08A = 8 Kbit
VSON08AX2030 adds A to the description.
Package
F: SOP8
FJ: SOP-J8
FVT: TSSOP-B8
FVM: MSOP8
NUX: VSON08AX2030
5: Process Code
A: Revision
Product Rank
C: for Automotive
Packaging and Forming Specification
E2: Embossed tape and reel (SOP8, SOP-J8, TSSOP-B8)
TR: Embossed tape and reel (MSOP8, VSON08AX2030)
Lineup
Package
Orderable Part Number
Type
Quantity
SOP8
Reel of 2500
Reel of 2500
Reel of 3000
Reel of 3000
Reel of 4000
BR24H08F
-5ACE2
-5ACE2
-5ACE2
-5ACTR
-5ACTR
SOP-J8
BR24H08FJ
TSSOP-B8
MSOP8
BR24H08FVT
BR24H08FVM
BR24H08ANUX
VSON08AX2030
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BR24H08xxx-5AC Series
Marking Diagrams
MSOP8 (TOP VIEW)
SOP8 (TOP VIEW)
Part Number Marking
LOT Number
4
H
D
5
Part Number Marking
4 H 0 8 A
5
A
LOT Number
Pin 1 Mark
Pin 1 Mark
VSON08AX2030 (TOP VIEW)
SOP-J8 (TOP VIEW)
Part Number Marking
LOT Number
Part Number Marking
4 H D
A A 5
4 H 0 8 A
5
LOT Number
Pin 1 Mark
Pin 1 Mark
TSSOP-B8 (TOP VIEW)
Part Number Marking
LOT Number
Pin 1 Mark
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BR24H08xxx-5AC Series
Physical Dimension and Packing Information
Package Name
SOP8
(Max 5.35 (include.BURR))
(UNIT: mm)
PKG: SOP8
Drawing No.: EX112-5001-1
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BR24H08xxx-5AC Series
Physical Dimension and Packing Information - continued
Package Name
SOP-J8
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BR24H08xxx-5AC Series
Physical Dimension and Packing Information - continued
Package Name
TSSOP-B8
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17.Sep.2021 Rev.002
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BR24H08xxx-5AC Series
Physical Dimension and Packing Information - continued
Package Name
MSOP8
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BR24H08xxx-5AC Series
Physical Dimension and Packing Information - continued
Package Name
VSON08AX2030
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BR24H08xxx-5AC Series
Revision History
Date
Revision
001
Changes
20.Apr.2021
17.Sep.2021
New Release
P.1 Add "Functional safety supportive automotive products".
P.30 Add Functional Safety in Operational Notes.
002
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Notice
Precaution on using ROHM Products
(Note 1)
1. If you intend to use our Products in devices requiring extremely high reliability (such as medical equipment
,
aircraft/spacecraft, nuclear power controllers, etc.) and whose malfunction or failure may cause loss of human life,
bodily injury or serious damage to property (“Specific Applications”), please consult with the ROHM sales
representative in advance. Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way
responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any
ROHM’s Products for Specific Applications.
(Note1) Medical Equipment Classification of the Specific Applications
JAPAN
USA
EU
CHINA
CLASSⅢ
CLASSⅣ
CLASSⅡb
CLASSⅢ
CLASSⅢ
CLASSⅢ
2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor
products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate
safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which
a failure or malfunction of our Products may cause. The following are examples of safety measures:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure
3. Our Products are not designed under any special or extraordinary environments or conditions, as exemplified below.
Accordingly, ROHM shall not be in any way responsible or liable for any damages, expenses or losses arising from the
use of any ROHM’s Products under any special or extraordinary environments or conditions. If you intend to use our
Products under any special or extraordinary environments or conditions (as exemplified below), your independent
verification and confirmation of product performance, reliability, etc, prior to use, must be necessary:
[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents
[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust
[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,
H2S, NH3, SO2, and NO2
[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves
[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items
[f] Sealing or coating our Products with resin or other coating materials
[g] Use of our Products without cleaning residue of flux (Exclude cases where no-clean type fluxes is used.
However, recommend sufficiently about the residue.); or Washing our Products by using water or water-soluble
cleaning agents for cleaning residue after soldering
[h] Use of the Products in places subject to dew condensation
4. The Products are not subject to radiation-proof design.
5. Please verify and confirm characteristics of the final or mounted products in using the Products.
6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse, is applied,
confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power
exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect
product performance and reliability.
7. De-rate Power Dissipation depending on ambient temperature. When used in sealed area, confirm that it is the use in
the range that does not exceed the maximum junction temperature.
8. Confirm that operation temperature is within the specified range described in the product specification.
9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in
this document.
Precaution for Mounting / Circuit board design
1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product
performance and reliability.
2. In principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must
be used on a through hole mount products. If the flow soldering method is preferred on a surface-mount products,
please consult with the ROHM representative in advance.
For details, please refer to ROHM Mounting specification
Notice-PAA-E
Rev.004
© 2015 ROHM Co., Ltd. All rights reserved.
Precautions Regarding Application Examples and External Circuits
1. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the
characteristics of the Products and external components, including transient characteristics, as well as static
characteristics.
2. You agree that application notes, reference designs, and associated data and information contained in this document
are presented only as guidance for Products use. Therefore, in case you use such information, you are solely
responsible for it and you must exercise your own independent verification and judgment in the use of such information
contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses
incurred by you or third parties arising from the use of such information.
Precaution for Electrostatic
This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper
caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be
applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,
isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).
Precaution for Storage / Transportation
1. Product performance and soldered connections may deteriorate if the Products are stored in the places where:
[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2
[b] the temperature or humidity exceeds those recommended by ROHM
[c] the Products are exposed to direct sunshine or condensation
[d] the Products are exposed to high Electrostatic
2. Even under ROHM recommended storage condition, solderability of products out of recommended storage time period
may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is
exceeding the recommended storage time period.
3. Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads
may occur due to excessive stress applied when dropping of a carton.
4. Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of
which storage time is exceeding the recommended storage time period.
Precaution for Product Label
A two-dimensional barcode printed on ROHM Products label is for ROHM’s internal use only.
Precaution for Disposition
When disposing Products please dispose them properly using an authorized industry waste company.
Precaution for Foreign Exchange and Foreign Trade act
Since concerned goods might be fallen under listed items of export control prescribed by Foreign exchange and Foreign
trade act, please consult with ROHM in case of export.
Precaution Regarding Intellectual Property Rights
1. All information and data including but not limited to application example contained in this document is for reference
only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any
other rights of any third party regarding such information or data.
2. ROHM shall not have any obligations where the claims, actions or demands arising from the combination of the
Products with other articles such as components, circuits, systems or external equipment (including software).
3. No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any
third parties with respect to the Products or the information contained in this document. Provided, however, that ROHM
will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to
manufacture or sell products containing the Products, subject to the terms and conditions herein.
Other Precaution
1. This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.
2. The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written
consent of ROHM.
3. In no event shall you use in any way whatsoever the Products and the related technical information contained in the
Products or this document for any military purposes, including but not limited to, the development of mass-destruction
weapons.
4. The proper names of companies or products described in this document are trademarks or registered trademarks of
ROHM, its affiliated companies or third parties.
Notice-PAA-E
Rev.004
© 2015 ROHM Co., Ltd. All rights reserved.
Daattaasshheeeett
General Precaution
1. Before you use our Products, you are requested to carefully read this document and fully understand its contents.
ROHM shall not be in any way responsible or liable for failure, malfunction or accident arising from the use of any
ROHM’s Products against warning, caution or note contained in this document.
2. All information contained in this document is current as of the issuing date and subject to change without any prior
notice. Before purchasing or using ROHM’s Products, please confirm the latest information with a ROHM sales
representative.
3. The information contained in this document is provided on an “as is” basis and ROHM does not warrant that all
information contained in this document is accurate and/or error-free. ROHM shall not be in any way responsible or
liable for any damages, expenses or losses incurred by you or third parties resulting from inaccuracy or errors of or
concerning such information.
Notice – WE
Rev.001
© 2015 ROHM Co., Ltd. All rights reserved.
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SI9137LG
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SI9122E
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