BR24G32NUX-5 [ROHM]
BR24G32NUX-5是I²C BUS 接口的32K 位串行EEPROM 。;型号: | BR24G32NUX-5 |
厂家: | ROHM |
描述: | BR24G32NUX-5是I²C BUS 接口的32K 位串行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37页 (文件大小:1637K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Datasheet
Serial EEPROM Series Standard EEPROM
I2C BUS EEPROM (2-Wire)
BR24G32xxx-5 Series
General Description
Key Specifications
BR24G32xxx-5 Series is a 32 Kbit serial EEPROM of I2C
BUS Interface.
◼
◼
◼
◼
◼
Write Cycles:
4 Million Times (Ta=25 °C)
200 Years (Ta=55 °C)
5 ms (Max)
Data Retention:
Write Cycle Time:
Supply Voltage:
1.6 V to 5.5 V
Features
Ambient Operating Temperature: -40 °C to +85 °C
◼
All Controls Available by 2 Ports of Serial Clock
(SCL) and Serial Data (SDA)
Packages
SOP8
W(Typ) x D(Typ) x H(Max)
5.00 mm x 6.20 mm x 1.71 mm
4.90 mm x 6.00 mm x 1.65 mm
3.00 mm x 6.40 mm x 1.20 mm
2.90 mm x 4.00 mm x 0.90 mm
2.00 mm x 3.00 mm x 0.60 mm
◼
1.6 V to 5.5 V Wide Limit of Operating Voltage,
Possible 1 MHz Operation
Page Write Mode 32 Bytes
Bit Format 4K x 8 bits
Low Current Consumption
◼
◼
◼
◼
SOP-J8
TSSOP-B8
MSOP8
VSON008X2030
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
◼
◼
Applications
Ordinary Electronic Equipment (such as AV Equipment,
SOP8
SOP-J8
MSOP8
OA Equipment, Telecommunication Equipment, Home
Electronic Appliances, Amusement Equipment, etc.).
Typical Application Circuit
VCC
VSON008X2030
VCC
WP
A0
A1
*
Micro-
controller
SCL
SDA
A2
TSSOP-B8
Figure 2
GND
0.1 µF
* 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 1. Typical Application Circuit
〇Product structure : Silicon integrated circuit 〇This product has no designed protection against radioactive rays
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BR24G32xxx-5 Series
Contents
General Description........................................................................................................................................................................1
Features..........................................................................................................................................................................................1
Applications ....................................................................................................................................................................................1
Typical Application Circuit ...............................................................................................................................................................1
Key Specifications ..........................................................................................................................................................................1
Packages........................................................................................................................................................................................1
Contents .........................................................................................................................................................................................2
Pin Configuration ............................................................................................................................................................................3
Pin Description................................................................................................................................................................................3
Block Diagram ................................................................................................................................................................................3
Absolute Maximum Ratings ............................................................................................................................................................4
Thermal Resistance........................................................................................................................................................................4
Operating Conditions......................................................................................................................................................................5
Input / Output Capacitance .............................................................................................................................................................5
Input Impedance.............................................................................................................................................................................5
Memory Cell Characteristics...........................................................................................................................................................5
Electrical Characteristics.................................................................................................................................................................6
AC Characteristics..........................................................................................................................................................................6
AC Characteristics Condition..........................................................................................................................................................6
Input / Output Timing ......................................................................................................................................................................7
Typical Performance Curves...........................................................................................................................................................8
I2C BUS Communication...............................................................................................................................................................17
Write Command............................................................................................................................................................................18
Read Command............................................................................................................................................................................19
Method of Reset ...........................................................................................................................................................................20
Acknowledge Polling.....................................................................................................................................................................20
WP Valid Timing (Write Cancel)....................................................................................................................................................21
Command Cancel by Start Condition and Stop Condition ............................................................................................................21
Application Examples ...................................................................................................................................................................22
Caution on Power-Up Conditions..................................................................................................................................................24
Low Voltage Malfunction Prevention Function ..............................................................................................................................24
I/O Equivalence Circuits................................................................................................................................................................25
Operational Notes.........................................................................................................................................................................26
Ordering Information.....................................................................................................................................................................27
Lineup...........................................................................................................................................................................................27
Marking Diagrams.........................................................................................................................................................................28
Physical Dimension and Packing Information...............................................................................................................................29
Revision History............................................................................................................................................................................34
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BR24G32xxx-5 Series
Pin Configuration
(TOP VIEW)
(TOP VIEW)
VCC
8
1
2
3
4
8
7
6
5
VCC
WP
A0
A1
1
2
3
4
A0
A1
7 WP
6 SCL
SCL
SDA
A2
A2
EXP-PAD
SDA
5
GND
GND
Figure 3-(a). Pin Configuration
(SOP8, SOP-J8, TSSOP-B8, MSOP8)
Figure 3-(b). Pin Configuration
(VSON008X2030)
Pin Description
Pin No.
Pin Name
A0
Input / Output
Descriptions
Slave address setting(Note 1)
Slave address setting(Note 1)
Slave address setting(Note 1)
Reference voltage of all input / output, 0 V
Serial data input / serial data output(Note 2)
Serial clock input
1
2
3
4
5
6
7
8
-
Input
A1
Input
A2
Input
GND
SDA
SCL
-
Input / Output
Input
Write protect pin(Note 3)
WP
Input
Connect the power source
VCC
EXP-PAD
-
-
Leave as OPEN or connect to GND
(Note 1) Connect to VCC or GND. There are pull-down elements inside the IC. If pins are open, they are the same as when they are connected to GND.
(Note 2) SDA is NMOS open drain, so it requires a pull-up resistor.
(Note 3) 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
8
VCC
32Kbit EEPROM Array
8bit
Address
Decoder
Word
Data
12bit
A1
A2
2
3
4
7
6
5
WP
Address Register
Register
START
STOP
SCL
SDA
Control Circuit
ACK
Supply Voltage
Detection
High Voltage
Generating Circuit
GND
Figure 4. Block Diagram
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BR24G32xxx-5 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
-3000 to +3000
10
V
Ta=25 °C
Ta=25 °C
IOLMAX
mA
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 boards 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 4)
Thermal Resistance (Typ)
Parameter
Symbol
Unit
1s(Note 6)
2s2p(Note 7)
SOP8
197.4
21
109.8
19
Junction to Ambient
Junction to Top Characterization Parameter(Note 5)
θJA
°C/W
°C/W
ΨJT
SOP-J8
Junction to Ambient
Junction to Top Characterization Parameter(Note 5)
θJA
149.3
18
76.9
11
°C/W
°C/W
ΨJT
TSSOP-B8
Junction to Ambient
Junction to Top Characterization Parameter(Note 5)
θJA
251.9
31
152.1
20
°C/W
°C/W
ΨJT
MSOP8
Junction to Ambient
Junction to Top Characterization Parameter(Note 5)
θJA
284.1
21
135.4
11
°C/W
°C/W
ΨJT
(Note 4) Based on JESD51-2A(Still-Air)
(Note 5) 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 6) Using a PCB board based on JESD51-3.
(Note 7) 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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BR24G32xxx-5 Series
Thermal Resistance(Note 8) - continued
Thermal Resistance (Typ)
Parameter
Symbol
Unit
1s(Note 10)
2s2p(Note 11)
VSON008X2030
308.3
43
69.6
10
Junction to Ambient
Junction to Top Characterization Parameter(Note 9)
θJA
°C/W
°C/W
ΨJT
(Note 8) Based on JESD51-2A(Still-Air)
(Note 9) 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 10) Using a PCB board based on JESD51-3.
(Note 11) 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 12)
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 12) This thermal via connects with the copper pattern of all layers.
Operating Conditions
Parameter
Supply Voltage
Symbol
Min
Typ
Max
Unit
VCC
Ta
C
1.6
-40
0.1
-
-
-
5.5
+85
-
V
Ambient Operating Temperature
Bypass Capacitor(Note 13)
°C
µF
(Note 13) Connect a bypass capacitor between the IC’s VCC and GND pin.
Input / Output Capacitance
(Ta=25 °C
,
f=1 MHz
)
Parameter
Symbol
Min
Typ
Max
8
Unit
Conditions
Input / Output Capacitance
(SDA)(Note 14)
pF VI/O=GND
pF VIN=GND
CI/O
-
-
-
-
Input Capacitance
CIN
8
(SCL, A0, A1, A2, WP)(Note 14)
(Note 14) Not 100% TESTED.
Input Impedance
Parameter
Input Impedance 1
Input Impedance 2
(Unless otherwise specified, Ta=-40 °C to +85 °C, VCC=1.6 V to 5.5 V)
Symbol
Min
Typ
Max
Unit
Conditions
ZIH
ZIL
500
30
-
-
-
-
kΩ 0.7VCC≤VIN (A0, A1, A2, WP)
kΩ VIN≤0.3VCC (A0, A1, A2, WP)
Memory Cell Characteristics (VCC=1.6 V to 5.5 V)
Parameter
Symbol
Min
Typ
Max
Unit
Conditions
Write Cycles(Note 15,16)
Data Retention(Note 15)
-
-
4,000,000
200
-
-
-
-
Times Ta=25 °C
Years Ta=55 °C
(Note 15) Not 100% TESTED.
(Note 16) The Write Cycles is defined for unit of 4 data bytes with the same address bits of WA11 to WA2.
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BR24G32xxx-5 Series
Electrical Characteristics
(Unless otherwise specified, Ta=-40 °C to +85 °C
,
VCC=1.6 V to 5.5 V
)
Parameter
Symbol
Min
Typ
Max
Unit
Conditions
Input High Voltage 1
Input Low Voltage 1
Input High Voltage 2
Input Low Voltage 2
VIH1
VIL1
VIH2
VIL2
0.7VCC
-0.3(Note 17)
0.8VCC
-
-
-
-
VCC+1.0
+0.3VCC
VCC+1.0
+0.2VCC
V
V
V
V
1.7 V≤VCC≤5.5 V
1.7 V≤VCC≤5.5 V
1.6 V≤VCC<1.7 V
1.6 V≤VCC<1.7 V
-0.3(Note 17)
IOL=3.2 mA, 2.5 V≤VCC≤5.5 V
(SDA)
IOL=1.0 mA, 1.6 V≤VCC<2.5 V
(SDA)
VIN=0 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
+1
V
V
-1
µA
Input Leakage Current 2
Output Leakage Current
ILI2
ILO
-1
-1
-
-
+1
+1
µA VIN=0 to VCC (SCL)
µA VOUT=0 to VCC (SDA)
VCC=5.5 V, fSCL=1 MHz, tWR=5 ms,
Byte Write, Page Write
VCC=5.5 V, fSCL=1 MHz
mA Random Read, Current Read,
Sequential Read
Supply Current (Write) (Note 18)
Supply Current (Read) (Note 18)
Standby Current
ICC1
ICC2
ISB
-
-
-
-
-
-
2.0
2.0
2.5
mA
VCC=5.5 V, SDA, SCL=VCC
A0, A1, A2, WP=GND
µA
(Note 17) When the pulse width is 50 ns or less, it is -1.0 V.
(Note 18) The average value during operation.
AC Characteristics
(Unless otherwise specified, Ta=-40 °C to +85 °C
,
VCC=1.6 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 19)
SDA, SCL (input) Fall Time(Note 19)
SDA (output) Fall Time(Note 19)
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
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 19) Not 100% TESTED.
AC Characteristics Condition
Parameter
Symbol
Conditions
Unit
Load Capacitance
CL
tR
100
20
pF
ns
ns
V
Input Rise Time
Input Fall Time
tF1
20
Input Voltage
VIL/VIH
-
0.2VCC/0.8VCC
0.3VCC/0.7VCC
Input / Output Data Timing Reference Level
V
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BR24G32xxx-5 Series
Input / Output Timing
tR
tHIGH
tF1
70%
70%
70%
30%
70%
70%
SCL
30%
30%
30%
tHD:STA
tHD:DAT
tLOW
tSU:DAT
70%
70%
SDA
(input)
70%
70%
30%
30%
tDH
tPD
tBUF
SDA
(output)
70%
70%
30%
30%
30%
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
70%
70%
tSU:STA
tSU:STO
tHD:STA
70%
30%
SDA
30%
STOP condition
START condition
Figure 5-(b). Start-Stop Condition Timing
SCL
SDA
70%
70%
D0
ACK
tWR
write data
(n-th address)
START condition
STOP condition
Figure 5-(c). Write Cycle Timing
DATA(n)
70%
SCL
DATA(1)
70%
ACK
SDA
WP
tWR
70%
30%
tHD:WP
STOP condition
tSU:WP
Figure 5-(d). WP Timing at Write Execution
SCL
SDA
DATA(n)
DATA(1)
70%
ACK
ACK
D1
D0
tWR
tHIGH:WP
70%
70%
WP
Figure 5-(e). WP Timing at Write Cancel
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BR24G32xxx-5 Series
Typical Performance Curves
6
5
4
3
2
1
0
6
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
5
4
3
2
1
0
SPEC
SPEC
0
1
2
3
4
5
6
0
1
2
3
4
5
6
SupplyVoltage : VCC[V]
SupplyVoltage : VCC[V]
Figure 6. Input High Voltage vs Supply Voltage
Figure 7. Input Low Voltage vs Supply Voltage
1.0
1.0
0.8
0.6
0.4
0.2
0.0
Ta=-40 °C
Ta=+25 °C
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
Ta=+85 °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=1.6 V)
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BR24G32xxx-5 Series
Typical Performance Curves - continued
1.2
1.2
1.0
0.8
0.6
0.4
0.2
0.0
SPEC
SPEC
1.0
0.8
0.6
0.4
0.2
0.0
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Input Voltage : V [V]
Input Voltage : V [V]
IN
IN
Figure 10. Input Leakage Current 1 vs Input Voltage
(Standby Mode)
Figure 11. Input Leakage Current 2 vs Input Voltage
1.2
2.5
SPEC
SPEC
1.0
2.0
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
0.8
1.5
1.0
0.5
0.0
0.6
0.4
0.2
0.0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Output Voltage : VOUT[V]
SupplyVoltage : VCC[V]
Figure 12. Output Leakage Current vs Output Voltage
Figure 13. Supply Current (Write) vs Supply Voltage
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BR24G32xxx-5 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=+85 °C
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
0
1
2
3
4
5
6
0
1
2
3
4
5
6
SupplyVoltage : VCC[V]
SupplyVoltage : VCC[V]
Figure 14. Supply Current (Read) vs Supply Voltage
(fSCL=1 MHz)
Figure 15. Standby Current vs Supply Voltage
10.0
300
SPEC
250
200
150
100
50
1.0
SPEC
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
0.1
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
SupplyVoltage : VCC[V]
SupplyVoltage : VCC[V]
Figure 16. Clock Frequency vs Supply Voltage
Figure 17. Data Clock High Period vs Supply Voltage
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BR24G32xxx-5 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=+85 °C
60
40
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
20
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
SupplyVoltage : VCC[V]
SupplyVoltage : 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=+25 °C
Ta=+85 °C
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
200
150
100
50
150
100
50
0
0
-50
0
1
2
3
4
5
6
0
1
2
3
4
5
6
SupplyVoltage : VCC[V]
SupplyVoltage : VCC[V]
Figure 20. Start Condition Hold Time vs Supply Voltage
Figure 21. Start Condition Setup Time vs Supply Voltage
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BR24G32xxx-5 Series
Typical Performance Curves - continued
50
0
50
SPEC
SPEC
0
-50
-50
-100
-150
-100
-150
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
0
1
2
3
4
5
6
0
1
2
3
4
5
6
SupplyVoltage : VCC[V]
SupplyVoltage : 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=+25 °C
Ta=+85 °C
Ta=-40 °C
Ta=+25 °C
Ta=+85 °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
SupplyVoltage : VCC[V]
SupplyVoltage : 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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BR24G32xxx-5 Series
Typical Performance Curves - continued
500
400
300
200
100
0
500
SPEC
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
SPEC
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
400
300
200
100
0
SPEC
SPEC
4
0
1
2
3
4
5
6
0
1
2
3
5
6
SupplyVoltage : VCC[V]
SupplyVoltage : 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=-40 °C
Ta=+25 °C
Ta=+25 °C
Ta=+85 °C
400
Ta=+85 °C
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
SupplyVoltage : VCC[V]
SupplyVoltage : 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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BR24G32xxx-5 Series
Typical Performance Curves - continued
600
500
400
300
200
100
0
300
SPEC
SPEC
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
250
200
150
100
50
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
SupplyVoltage : VCC[V]
SupplyVoltage : VCC[V]
Figure 30. Stop Condition Setup Time vs Supply Voltage
Figure 31. Bus Free Time vs Supply Voltage
200
6
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
SPEC
5
150
100
50
4
3
2
SPEC
Ta=-40 °C
1
Ta=+25 °C
Ta=+85 °C
0
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
SupplyVoltage : VCC[V]
SupplyVoltage : VCC[V]
Figure 32. Write Cycle Time vs Supply Voltage
Figure 33. Noise Suppression Time vs Supply Voltage
(SCL ‘HIGH’)
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BR24G32xxx-5 Series
Typical Performance Curves - continued
200
150
100
50
200
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
150
100
50
SPEC
SPEC
0
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
SupplyVoltage : VCC[V]
SupplyVoltage : VCC[V]
Figure 34. Noise Suppression Time vs Supply Voltage
(SCL ‘LOW’)
Figure 35. Noise Suppression Time vs Supply Voltage
(SDA ‘HIGH’)
1.2
200
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
SPEC
1.0
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
150
100
0.8
0.6
0.4
0.2
0.0
50
SPEC
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
SupplyVoltage : VCC[V]
SupplyVoltage : VCC[V]
Figure 36. Noise Suppression Time vs Supply Voltage
(SDA ‘LOW’)
Figure 37. WP Hold Time vs Supply Voltage
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BR24G32xxx-5 Series
Typical Performance Curves - continued
0.2
1.2
1.0
0.8
0.6
0.4
0.2
0.0
SPEC
0.1
0.0
SPEC
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
Ta=-40 °C
Ta=+25 °C
Ta=+85 °C
0
1
2
3
4
5
6
0
1
2
3
4
5
6
SupplyVoltage : VCC[V]
SupplyVoltage : VCC[V]
Figure 38. WP Setup Time vs Supply Voltage
Figure 39. WP High Period vs Supply Voltage
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BR24G32xxx-5 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 bits 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 control communication start and end. The rest
become “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 “transmitter”, and the device that
receives data is called “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
condition
DATA
ACK
DATA
ACK STOP
condition
Figure 40. Data Transfer Timing
2. Start Condition (Start Bit Recognition)
(1) Before executing each command, start condition (start bit) where 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) where SDA goes from ‘LOW’ to ‘HIGH’ while SCL is
‘HIGH’.
4. Acknowledge (ACK) Signal
(1) This 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 bits 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 bits 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, after recognizing start condition and slave address (8 bits), outputs ACK signal ‘LOW’.
(4) Each write operation outputs ACK signal ‘LOW’ every 8 bits data (a word address and write data) reception.
(5) During read operation, this IC outputs 8 bits 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 will continue 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 becomes 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 addresses (A2 A1 A0 --- device address) are 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 device whose
‘VCC’ ‘GND’ input conditions of the A0, A1, A2 pin match the ‘HIGH’ ‘LOW’ input conditions of slave address sent
from the master.
(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
8
1
0
1
0 A2 A1 A0 R/ W
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BR24G32xxx-5 Series
Write Command
1. Write
(1) Arbitrary data can be written to EEPROM. When writing only 1 byte, Byte Write is normally used, and when writing
continuous data of 2 bytes or more, simultaneous write is possible by Page Write. Up to 32 arbitrary bytes can be
written.
SLAVE
ADDRESS
1st WORD
ADDRESS
2nd WORD
ADDRESS
WRITE
START
DATA
STOP
SDA
LINE
WAWA
*
* *
11 10
WA
0
1
0
1
0 A2A1A0
R/W
D7
D0
ACK
*
*Don’t Care bit
ACK
ACK
ACK
Figure 41. Byte Write
SLAVE
ADDRESS
1st WORD
ADDRESS(n)
2nd WORD
ADDRESS(n)
START
WRITE
DATA(n)
DATA(n+63)
STOP
SDA
LINE
WA
WA
*Don’t Care bit
1
0
1
D7
D0
D0
0 A2 A1 A0
11
0
*
* *
*
ACK
R/W ACK
ACK
ACK
ACK
Figure 42. Page Write
(2) During internal write execution, all input commands are ignored, therefore ACK is not returned.
(3) Data is written to the address designated by word address (n-th address)
(4) By issuing stop bit after 8 bits data input, internal write to memory cell starts.
(5) When internal write is started, command is not accepted for tWR (5 ms at maximum).
(6) Using Page Write, it is possible to write one lump sum up to 32 bytes. When data of more than 32 bytes is sent, the
excess of the bytes is overwritten the data sent already from first byte. (Refer to “Internal Address Increment”).
(7) As for page write where 2 or more bytes of data is intended to be written, after the word address are designated
arbitrarily, only the value of 5 least significant bits in the address is incremented internally, so that data up to 32
bytes of memory only can be written.
(8) When VCC is turned off during tWR, data at the designated address is not guaranteed, please write it again.
1 page=32bytes, but the write time of page write is 5 ms at maximum for 32byte batch write.
It is not equal to 5 ms at maximum x 32byte=160 ms(Max).
2. Internal Address Increment
Page write mode
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 1Eh, then,
1Eh→1Fh→00h→01h···. Please take note that it will be
incremented.
0
0
0
0
0
0
0
0
0
1
1
0
1
1
0
1
1
0
1
1
0
0
1
0
1Eh
*1Eh···1E in hexadecimal, therefore, 00011110 becomes 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 connect 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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BR24G32xxx-5 Series
Write Command – continued
4. ECC Function
This IC has ECC bits for Error Correction every 4 bytes with the same address bits of WA11 to WA2. In read operation,
if 1 bit of error data exists in 4 bytes, this error data will be corrected by the ECC function and outputs the correct data.
In write operation, only 1 byte of data is to be written, 4 bytes of data will be written as one group with the same
address bits of WA11 to WA2 (the data to be written in the remaining 3 bytes will be the same as its previous stored
data). Therefore, the number of write cycle times is guaranteed every 4 bytes with the same address bits of WA11 to
WA2.
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
Read Command
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 where the next address data
can be read in succession.
SLAVE
ADDRESS
1st WORD
ADDRESS(n)
2nd WORD SLAVE
ADDRESS(n) START ADDRESS
DATA(n)
STOP
START
WRITE
READ
SDA
LINE
WA
0
WAWA
11 10
A2
1 0 1 0 A1A0
1 0 1 0
A1A0
D7
D0
A2
*
*
*
*
* Don’t Care bit
ACK
ACK
ACK
ACK
ACK
R/W
R/W
Figure 44. Random Read
SLAVE
START ADDRESS
DATA(n)
READ
STOP
SDA
LINE
1 0 1 0 A2A1A0
D7
D0
ACK
R/W ACK
Figure 45. Current Read
SLAVE
ADDRESS
START
1
READ
DATA(n)
DATA(n+x)
STOP
SDA
LINE
A2 A0
A1
0
1
0
D7
D0
D7
D0
R/W ACK
ACK
ACK
ACK
Figure 46. Sequential Read (in the Case of Current Read)
(1) In random read, data of designated word address can be read.
(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’ after D0 is detected, 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 where ‘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 where SDA goes from ‘LOW’ to ‘HIGH’ while SCL signal is ‘HIGH’.
(6) Sequential read is ended by stop condition where ‘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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BR24G32xxx-5 Series
Method of Reset
This IC can be reset by sending the stop condition after executing the start condition. Please execute it 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 is released, send the stop condition after inputting the start 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)
Send the stop condition after executing the start condition.
Input SCL clock until SDA bus is released, confirm that SDA bus is released, and send the
stop condition after inputting start condition.
‘LOW’
Microcontroller cannot
confirm SDA bus is
released or not
Using the software reset shown in the figure below, the start condition can be always
excuted. Within the dummy clock input area, the SDA bus is needed to be released. For
normal commands, start with the start condition input.
Stop
Dummy clock x 9
Start
Start
SCL
SDA
Normal command
Normal command
1
2
8
9
Figure 47. Input Timing of Software Reset
Acknowledge Polling
During internal write execution, all input commands are ignored, therefore ACK is not returned. During internal automatic
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 = 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 internal write,
First write command
ACK = HIGH is returned.
START
START
Slave
START
STOP
Slave
Address
Write Command
···
Address
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 internal write,
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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BR24G32xxx-5 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 becomes ‘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
D0 ACK
SDA D0
ACK
Enlarged view
Enlarged view
STOP
START
tWR
Slave
Address
Word
SDA
D7 D6 D5
D2
D1 D0
D4 D3
Data
Address
ACK
=LOW
ACK
=LOW
ACK
=LOW
ACK
=LOW
WP Invalid Area
WP Invalid Area
WP Valid Area
WP
If WP=‘HIGH’ in this area,
data is not written
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 setting address
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
SDA
1
0
1
0
Start Condition
Stop Condition
Figure 50. The Case of Cancel by Start, Stop Condition during Slave Address Input
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BR24G32xxx-5 Series
Application Examples
1. I/O Peripheral Circuit
(1) Pull-up Resistance of 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
EEPROM
V
CC -I
L
R
PU -0.2VCC VIH
IL
0.8VCC
-VIH
SDA Pin
A
∴
RPU
IL
Ex.) VCC=3 V IL=10 µA VIH=0.7VCC
from (b)
IL1
IL2
Bus line
0.8 3 -0.7 3
Capacitance
CBUS
∴
R
PU
6
10
10 -
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
EEPROM.
A should be equal to or less than output ‘LOW’ level (VOL) of
○
V
CC
-
V
OL
IOL
R
PU
V
CC
-
V
OL
∴
RPU
I
OL
Ex.) VCC=3 V, VOL=0.4 V, IOL=3.2 mA, microcontroller, EEPROM VIL=0.3 VCC
3 -0.4
∴
RPU
3
.2
10-3
812 ꢀ.5
[ Ω]
(4) Pull-up Resistance of 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
where 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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BR24G32xxx-5 Series
Application Examples – continued
2. Cautions on Microcontroller Connection
(1) RS
In I2C BUS, it is recommended that SDA port is of 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
EEPROM
Microcontroller
Over current flows to SDA line by ‘HIGH’
output of microcontroller and ‘LOW’
output of EEPROM.
Figure 52. I/O Circuit Diagram
Figure 53. I/O Collision Timing
(2) Maximum Value of RS
The maximum value of RS is determined by the following relations.
(a) SDA rise time to be 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
.
(
V
CC
-
V
OL )
R
S
VCC
+
V
OL
+
0
.
1VCC
VIL
R
PU
+
R
S
A
RPU
V
IL -VOL -0.1V
CC RPU
RS
∴R
S
VOL
1.1VCC -VIL
IOL
Ex.) VCC=3 V VIL=0.3VCC VOL=0.4 V RPU=20 kΩ
Bus line
capacitance
CBUS
0.3 3 -0.4 -0.1ꢀ3
R
S
20
103
VIL
EEPROM
Microcontroller
1.1 3 -0.3 3
Figure 54. I/O Circuit Diagram
1.67
[ 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.
V
CC
VCC
I
R
S
RPU
RS
‘LOW’
output
V
CC
Rs
I
Ex.) VCC=3 V I=10 mA
Over current I
‘HIGH’
output
3
Rs
-3
10 10
EEPROM
Microcontroller
300
[ Ω]
Figure 55. I/O Circuit Diagram
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BR24G32xxx-5 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 misread 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 become stable to the start of the first command input.
tR:VCC tINIT
VCC
VCC(Min)
tPOFF
Command
start
Vbot
0V
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 20)
Initialize Time(Note 20)
-
-
-
-
tPOFF
1
ms
ms
ms
-
tINIT
0.1
0.001
Supply Voltage Rising Time(Note 20)
tR:VCC
100
(Note 20) Not 100% TESTED
If the above conditions are not followed, the POR circuit will not operate properly, the logic circuit of internal IC becomes
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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BR24G32xxx-5 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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BR24G32xxx-5 Series
Operational Notes
1.
2.
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.
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.
4.
Ground Voltage
Ensure that no pins are at a voltage below that of the ground pin at any time, even during transient condition.
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.
6.
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.
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.
8.
Operation Under Strong Electromagnetic Field
Operating the IC in the presence of a strong electromagnetic field may cause the IC to malfunction.
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.
9.
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.
10. 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.
11. 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.
12. 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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BR24G32xxx-5 Series
Ordering Information
B
R
2
4
G
3
2
x
x
x
-
5
x
x
BUS Type
24 : I2C
Ambient Operating Temperature
/ Supply Voltage
-40 °C to +85 °C
/ 1.6 V to 5.5 V
Capacity
32=32Kbit
Package
F : SOP8
FJ : SOP-J8
FVT : TSSOP-B8
FVM : MSOP8
NUX : VSON008X2030
Process Code
Packaging and Forming Specification
E2 : Embossed tape and reel (SOP8, SOP-J8, TSSOP-B8)
TR : Embossed tape and reel (MSOP8, VSON008X2030)
Lineup
Package
Orderable Part Number
Type
Quantity
SOP8
Reel of 2500
Reel of 2500
Reel of 3000
Reel of 3000
Reel of 4000
BR24G32F
-5E2
-5E2
-5E2
-5TR
-5TR
SOP-J8
BR24G32FJ
TSSOP-B8
MSOP8
BR24G32FVT
BR24G32FVM
BR24G32NUX
VSON008X2030
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BR24G32xxx-5 Series
Marking Diagrams
SOP8(TOP VIEW)
MSOP8(TOP VIEW)
Part Number Marking
LOT Number
4
G
F
5
Part Number Marking
4
G
3
2
5
LOT Number
Pin 1 Mark
Pin 1 Mark
SOP-J8(TOP VIEW)
VSON008X2030 (TOP VIEW)
Part Number Marking
LOT Number
Part Number Marking
4
G
3
2
5
4 G 3
2
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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BR24G32xxx-5 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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BR24G32xxx-5 Series
Physical Dimension and Packing Information - continued
Package Name
SOP-J8
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BR24G32xxx-5 Series
Physical Dimension and Packing Information - continued
Package Name
TSSOP-B8
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BR24G32xxx-5 Series
Physical Dimension and Packing Information - continued
Package Name
MSOP8
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BR24G32xxx-5 Series
Physical Dimension and Packing Information - continued
Package Name
VSON008X2030
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BR24G32xxx-5 Series
Revision History
Date
Revision
001
Changes
06.Apr.2018
New Release
P5 Deleted the comments on columns for condition of input impedance 1 and input
impedance 2.
09.Mar.2020
002
Change the fonts and format.
P.19 Correction of error in Number of remaining write cycles.
P.6 Add Note.18.
05.Jun.2020
28.Dec.2021
003
004
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Notice
Precaution on using ROHM Products
1. Our Products are designed and manufactured for application in ordinary electronic equipment (such as AV equipment,
OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you
intend to use our Products in devices requiring extremely high reliability (such as medical equipment (Note 1), transport
equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, 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 designed and manufactured for use under standard conditions and not 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-PGA-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-PGA-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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