CAT25128VE.G [ONSEMI]
128-Kb SPI Serial CMOS EEPROM; 128 KB的SPI串行EEPROM CMOS
| 型号： | CAT25128VE.G |
| 厂家： | 
ONSEMI |
| 描述： | 128-Kb SPI Serial CMOS EEPROM |
| 文件： | 总20页 (文件大小：216K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CAT25128
128-Kb SPI Serial CMOS
EEPROM
Description
The CAT25128 is a 128−Kb Serial CMOS EEPROM device
internally organized as 16Kx8 bits. This features a 64−byte page write
buffer and supports the Serial Peripheral Interface (SPI) protocol. The
device is enabled through a Chip Select (CS) input. In addition, the
required bus signals are clock input (SCK), data input (SI) and data
output (SO) lines. The HOLD input may be used to pause any serial
communication with the CAT25128 device. The device features
software and hardware write protection, including partial as well as
full array protection.
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SOIC−8
V SUFFIX
CASE 751BD
TDFN−8**
VP2 SUFFIX
CASE 511AK
UDFN−8
HU4 SUFFIX
CASE 517AZ
On−Chip ECC (Error Correction Code) makes the device suitable
for high reliability applications.*
Features
• 20 MHz SPI Compatible
PDIP−8
L SUFFIX
CASE 646AA
TSSOP−8
Y SUFFIX
CASE 948AL
SOIC−8
X SUFFIX
CASE 751BE
• 1.8 V to 5.5 V Supply Voltage Range
• SPI Modes (0,0) & (1,1)
• 64−byte Page Write Buffer
PIN CONFIGURATION
• Additional Identification Page with Permanent Write Protection
• Self−timed Write Cycle
1
CS
SO
WP
V
CC
• Hardware and Software Protection
HOLD
SCK
SI
• Block Write Protection
− Protect 1/4, 1/2 or Entire EEPROM Array
• Low Power CMOS Technology
V
SS
PDIP (L), SOIC (X, V),
• 1,000,000 Program/Erase Cycles
• 100 Year Data Retention
TSSOP (Y), TDFN** (VP2), UDFN (HU4)
** The TDFN−8 (VP2) package is not recommended
for new designs.
• Industrial and Extended Temperature Range
• 8−lead PDIP, SOIC, TSSOP and 8−pad TDFN, UDFN Packages
• This Device is Pb−Free, Halogen Free/BFR Free, and RoHS
Compliant
PIN FUNCTION
†
Pin Name
Function
Chip Select
V
CC
CS
SO
Serial Data Output
Write Protect
SI
WP
CS
V
Ground
SS
CAT25128
SO
WP
SI
Serial Data Input
Serial Clock
HOLD
SCK
SCK
HOLD
Hold Transmission Input
Power Supply
V
CC
V
SS
†The exposed pad for the TDFN/UDFN packages can
be left floating or connected to Ground.
Figure 1. Functional Symbol
* Available for New Product (Rev. E)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 19 of this data sheet.
© Semiconductor Components Industries, LLC, 2012
1
Publication Order Number:
September, 2012 − Rev. 7
CAT25128/D
CAT25128
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameters
Ratings
Units
°C
Operating Temperature
−45 to +130
−65 to +150
−0.5 to +6.5
Storage Temperature
°C
Voltage on any Pin with Respect to Ground (Note 1)
V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. The DC input voltage on any pin should not be lower than −0.5 V or higher than V + 0.5 V. During transitions, the voltage on any pin may
CC
undershoot to no less than −1.5 V or overshoot to no more than V + 1.5 V, for periods of less than 20 ns.
CC
Table 2. RELIABILITY CHARACTERISTICS (Note 2)
Symbol
(Notes 3, 4)
Parameter
Min
1,000,000
100
Units
Program / Erase Cycles
Years
N
Endurance
END
T
DR
Data Retention
2. These parameters are tested initially and after a design or process change that affects the parameter according to appropriate AEC−Q100
and JEDEC test methods.
3. Page Mode, V = 5 V, 25°C.
CC
4. The new product revision (E) uses ECC (Error Correction Code) logic with 6 ECC bits to correct one bit error in 4 data bytes. Therefore, when
a single byte has to be written, 4 bytes (including the ECC bits) are re−programmed. It is recommended to write by multiple of 4 bytes in order
to benefit from the maximum number of write cycles.
Table 3. D.C. OPERATING CHARACTERISTICS − MATURE PRODUCT
(V = 1.8 V to 5.5 V, T = −40°C to +85°C and V = 2.5 V to 5.5 V, T = −40°C to +125°C, unless otherwise specified.)
CC
A
CC
A
Symbol
Parameter
Test Conditions
Min
Max
2
Units
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
V
I
Supply Current
(Read Mode)
Read, V = 5.5 V,
10 MHz / −40°C to 85°C
CCR
CC
SO open
5 MHz / −40°C to 125°C
10 MHz / −40°C to 85°C
5 MHz / −40°C to 125°C
2
I
Supply Current
(Write Mode)
Write, V = 5.5 V,
4
CCW
CC
SO open
4
I
Standby Current
V
IN
= GND or V , CS = V
,
,
T = −40°C to +85°C
1
SB1
CC
CC
A
WP = V , HOLD = V
,
CC
= 5.5 V
CC
T = −40°C to +125°C
A
3
V
CC
I
Standby Current
V
IN
= GND or V , CS = V
T = −40°C to +85°C
A
4
SB2
CC
CC
WP = GND, HOLD = GND,
T = −40°C to +125°C
A
5
V
CC
= 5.5 V
I
L
Input Leakage Current
V
IN
= GND or V
CC
−2
−1
2
I
LO
Output Leakage
Current
CS = V
OUT
,
T = −40°C to +85°C
A
1
CC
V
= GND or V
CC
T = −40°C to +125°C
A
−1
2
V
IL
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Output Low Voltage
Output High Voltage
−0.5
0.3 V
CC
V
IH
0.7 V
V + 0.5
CC
V
CC
V
V
CC
V
CC
V
CC
V
CC
> 2.5 V, I = 3.0 mA
0.4
V
OL1
OH1
OL
V
> 2.5 V, I = −1.6 mA
V
V
− 0.8 V
− 0.2 V
V
OH
CC
V
> 1.8 V, I = 150 mA
0.2
V
OL2
OH2
OL
V
> 1.8 V, I = −100 mA
V
OH
CC
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CAT25128
Table 4. D.C. OPERATING CHARACTERISTICS − NEW PRODUCT (Rev E)
(V = 1.8 V to 5.5 V, T = −40°C to +85°C and V = 2.5 V to 5.5 V, T = −40°C to +125°C, unless otherwise specified.)
CC
A
CC
A
Symbol
Parameter
Test Conditions
Min
Max
0.8
1.2
3.0
2.0
Units
I
Supply Current
(Read Mode)
Read, SO open /
V
CC
V
CC
V
CC
= 1.8 V, f
SCK
= 5 MHz
=10 MHz
= 20 MHz
mA
CCR
−40°C to +85°C
= 2.5 V, f
SCK
SCK
= 5.5 V, f
Read, SO open /
−40°C to +125°C
2.5 V< V < 5.5 V,
CC
f
= 10 MHz
= 1.8 V
= 2.5 V
= 5.5 V
SCK
I
Supply Current
(Write Mode)
Write, CS = V
/
V
V
V
1.5
2
mA
CCW
CC
CC
CC
CC
−40°C to +85°C
2
Write, CS = V
/
2.5 V< V < 5.5 V
2
CC
CC
−40°C to +125°C
I
Standby Current
V
= GND or V
CC
= 5.5 V
,
T = −40°C to +85°C
1
3
3
5
2
1
2
mA
mA
SB1
IN
CC
A
CS = V , WP = V
,
CC
T = −40°C to +125°C
A
V
CC
I
Standby Current
V
IN
= GND or V
,
T = −40°C to +85°C
A
SB2
CC
CS = V , WP = GND,
CC
= 5.5 V
T = −40°C to +125°C
A
V
CC
I
L
Input Leakage Current
V
IN
= GND or V
CC
−2
−1
mA
mA
I
Output Leakage
Current
CS = V
T = −40°C to +85°C
A
LO
CC
V
OUT
= GND or V
CC
T = −40°C to +125°C
A
−1
V
Input Low Voltage
Input High Voltage
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Output Low Voltage
Output High Voltage
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
≥ 2.5 V
≥ 2.5 V
< 2.5 V
< 2.5 V
−0.5
0.3 V
CC
V
V
V
V
V
V
V
V
IL1
V
IH1
0.7 V
V
CC
+ 0.5
CC
V
−0.5
0.75 V
0.25 V
CC
IL2
IH2
V
V
CC
+ 0.5
CC
V
≥ 2.5 V, I = 3.0 mA
0.4
OL1
OH1
OL
V
≥ 2.5 V, I = −1.6 mA
V
V
− 0.8 V
− 0.2 V
OH
CC
V
< 2.5 V, I = 150 mA
0.2
OL2
OH2
OL
V
< 2.5 V, I = −100 mA
OH
CC
Table 5. PIN CAPACITANCE (Note 5) (T = 25°C, f = 1.0 MHz, V = +5.0 V)
A
CC
Symbol
Test
Conditions
= 0 V
Min
Typ
Max
8
Units
pF
C
Output Capacitance (SO)
Input Capacitance (CS, SCK, SI, WP, HOLD)
V
OUT
OUT
C
V
IN
= 0 V
8
pF
IN
5. These parameters are tested initially and after a design or process change that affects the parameter according to appropriate AEC−Q100
and JEDEC test methods.
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CAT25128
Table 6. A.C. CHARACTERISTICS − MATURE PRODUCT
(T = −40°C to +85°C (Industrial) and T = −40°C to +125°C (Extended).) (Notes 6, 9)
A
A
V
= 1.8 V − 5.5 V / −405C to +855C
= 2.5 V − 5.5 V / −405C to +1255C
V
= 2.5 V − 5.5 V
CC
CC
V
CC
−405C to +855C
Min
DC
40
Max
Min
Max
Symbol
Parameter
Units
MHz
ns
f
Clock Frequency
5
DC
10
SCK
t
Data Setup Time
Data Hold Time
20
20
40
40
SU
t
H
40
ns
t
SCK High Time
75
ns
WH
t
SCK Low Time
75
ns
WL
t
HOLD to Output Low Z
Input Rise Time
50
2
25
2
ns
LZ
t
RI
(Note 7)
(Note 7)
ms
t
FI
Input Fall Time
2
2
ms
t
t
HOLD Setup Time
HOLD Hold Time
Output Valid from Clock Low
Output Hold Time
Output Disable Time
HOLD to Output High Z
CS High Time
0
0
ns
HD
CD
10
10
ns
t
V
75
40
ns
t
0
0
ns
HO
t
50
20
25
ns
DIS
t
100
ns
HZ
t
140
30
70
15
15
15
15
10
60
ns
CS
t
CS Setup Time
ns
CSS
CSH
CNS
CNH
WPS
WPH
t
t
CS Hold Time
30
ns
CS Inactive Setup Time
CS Inactive Hold Time
WP Setup Time
20
ns
t
20
ns
t
10
ns
t
WP Hold Time
100
ns
t
(Note 8)
Write Cycle Time
5
5
ms
WC
6. AC Test Conditions:
Input Pulse Voltages: 0.3 V to 0.7 V
CC
CC
Input rise and fall times: ≤ 10 ns
Input and output reference voltages: 0.5 V
CC
Output load: current source I
/I
; C = 50 pF
OL max OH max L
7. This parameter is tested initially and after a design or process change that affects the parameter.
8. t is the time from the rising edge of CS after a valid write sequence to the end of the internal write cycle.
WC
9. All Chip Select (CS) timing parameters are defined relative to the positive clock edge (Figure 2). t
timing specification is valid
CSH
for die revision D and higher. The die revision D is identified by letter “D” or a dedicated marking code on top of the package. For
previous product revision (Rev.C) the t
is defined relative to the negative clock edge.
CSH
Table 7. POWER−UP TIMING (Notes 7, 10)
Symbol
Parameter
Max
1
Units
ms
t
Power−up to Read Operation
Power−up to Write Operation
PUR
t
1
ms
PUW
10.t
and t
are the delays required from the time V is stable until the specified operation can be initiated.
PUR
PUW
CC
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CAT25128
Table 8. A.C. CHARACTERISTICS – NEW PRODUCT (Rev E) (V = 1.8 V to 5.5 V, T = −40°C to +85°C (Industrial) and
CC
A
V
CC
= 2.5 V to 5.5 V, T = −40°C to +125°C, unless otherwise specified.) (Note 11)
A
V
CC
= 1.8 V − 5.5 V
V
CC
= 2.5 V − 5.5 V
V
CC
= 4.5 V − 5.5 V
−405C to +855C
−405C to +1255C
−405C to +855C
Min
DC
20
Max
Min
DC
10
Max
Min
DC
5
Max
Symbol
Parameter
Clock Frequency
Units
MHz
ns
f
5
10
20
SCK
t
Data Setup Time
Data Hold Time
SU
t
H
20
10
5
ns
t
SCK High Time
75
40
20
20
ns
WH
t
SCK Low Time
75
40
ns
WL
t
HOLD to Output Low Z
Input Rise Time
50
2
25
2
25
2
ns
LZ
t
RI
(Note 12)
(Note 12)
ms
t
FI
Input Fall Time
2
2
2
ms
t
t
HOLD Setup Time
HOLD Hold Time
Output Valid from Clock Low
Output Hold Time
Output Disable Time
HOLD to Output High Z
CS High Time
0
0
0
5
ns
HD
CD
10
10
ns
t
V
75
40
20
ns
t
0
0
0
ns
HO
t
50
20
25
20
25
ns
DIS
t
100
ns
HZ
t
80
30
30
20
20
10
10
40
30
30
20
20
10
10
20
15
20
15
15
10
10
ns
CS
t
CS Setup Time
ns
CSS
CSH
CNS
CNH
WPS
WPH
t
t
CS Hold Time
ns
CS Inactive Setup Time
CS Inactive Hold Time
WP Setup Time
ns
t
ns
t
ns
t
WP Hold Time
ns
t
(Note 13)
Write Cycle Time
5
5
5
ms
WC
11. AC Test Conditions:
Input Pulse Voltages: 0.3 V to 0.7 V
CC
CC
Input rise and fall times: ≤ 10 ns
Input and output reference voltages: 0.5 V
CC
Output load: current source I
/I
; C = 30 pF
OL max OH max L
12.This parameter is tested initially and after a design or process change that affects the parameter.
13.t is the time from the rising edge of CS after a valid write sequence to the end of the internal write cycle.
WC
Table 9. POWER−UP TIMING (Notes 12, 14)
Symbol Parameter
Min
0.1
0.1
Max
1
Units
t
Power−up to Read Operation
Power−up to Write Operation
ms
ms
PUR
t
1
PUW
14.t
and t
are the delays required from the time V is stable until the specified operation can be initiated.
PUR
PUW
CC
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CAT25128
Pin Description
Functional Description
The CAT25128 device supports the Serial Peripheral
Interface (SPI) bus protocol, modes (0,0) and (1,1). The
device contains an 8−bit instruction register. The instruction
set and associated op−codes are listed in Table 10.
Reading data stored in the CAT25128 is accomplished by
simply providing the READ command and an address.
Writing to the CAT25128, in addition to a WRITE
command, address and data, also requires enabling the
device for writing by first setting certain bits in a Status
Register, as will be explained later.
SI: The serial data input pin accepts op−codes, addresses
and data. In SPI modes (0,0) and (1,1) input data is latched
on the rising edge of the SCK clock input.
SO: The serial data output pin is used to transfer data out of
the device. In SPI modes (0,0) and (1,1) data is shifted out
on the falling edge of the SCK clock.
SCK: The serial clock input pin accepts the clock provided
by the host and used for synchronizing communication
between host and CAT25128.
CS: The chip select input pin is used to enable/disable the
CAT25128. When CS is high, the SO output is tri−stated (high
impedance) and the device is in Standby Mode (unless an
internal write operation is in progress). Every communication
session between host and CAT25128 must be preceded by a
high to low transition and concluded with a low to high
transition of the CS input.
After a high to low transition on the CS input pin, the
CAT25128 will accept any one of the six instruction
op−codes listed in Table 10 and will ignore all other possible
8−bit combinations. The communication protocol follows
the timing from Figure 2.
The CAT25128, New Product Rev E features an
additional Identification Page (64 bytes) which can be
accessed for Read and Write operations when the IPL bit
from the Status Register is set to “1”. The user can also
choose to make the Identification Page permanent write
protected.
WP: The write protect input pin will allow all write
operations to the device when held high. When WP pin is
tied low and the WPEN bit in the Status Register (refer to
Status Register description, later in this Data Sheet) is set to
“1”, writing to the Status Register is disabled.
Table 10. INSTRUCTION SET
HOLD: The HOLD input pin is used to pause transmission
between host and CAT25128, without having to retransmit
the entire sequence at a later time. To pause, HOLD must be
taken low and to resume it must be taken back high, with the
SCK input low during both transitions. When not used for
pausing, it is recommended the HOLD input to be tied to
Instruction
WREN
WRDI
Opcode
0000 0110
0000 0100
0000 0101
0000 0001
0000 0011
0000 0010
Operation
Enable Write Operations
Disable Write Operations
Read Status Register
Write Status Register
Read Data from Memory
Write Data to Memory
RDSR
WRSR
READ
V , either directly or through a resistor.
CC
WRITE
t
CS
CS
t
t
t
WL
CSS
WH
t
t
t
CNH
CSH
CNS
SCK
SI
t
H
t
RI
t
FI
t
SU
VALID
IN
t
V
t
V
t
DIS
t
HO
HI−Z
HI−Z
VALID
OUT
SO
Figure 2. Synchronous Data Timing
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CAT25128
Status Register
The Status Register, as shown in Table 11, contains a
number of status and control bits.
protected sections of memory. While hardware write
protection is active, only the non−block protected memory
can be written. Hardware write protection is disabled when
the WP pin is high or the WPEN bit is 0. The WPEN bit, WP
pin and WEL bit combine to either permit or inhibit Write
operations, as detailed in Table 13.
The IPL (Identification Page Latch) bit determines
whether the additional Identification Page (IPL = 1) or main
memory array (IPL = 0) can be accessed both for Read and
Write operations. The IPL bit is set by the user with the
WRSR command and is volatile. The IPL bit is
automatically reset after read/write operations.
The LIP bit is set by the user with the WRSR command
and is non−volatile. When set to 1, the Identification Page is
permanently write protected (locked in Read−only mode).
Note: The IPL and LIP bits cannot be set to 1 using the
same WRSR instruction. If the user attempts to set (“1”)
both the IPL and LIP bit in the same time, these bits cannot
be written and therefore they will remain unchanged.
The RDY (Ready) bit indicates whether the device is busy
with a write operation. This bit is automatically set to 1 during
an internal write cycle, and reset to 0 when the device is ready
to accept commands. For the host, this bit is read only.
The WEL (Write Enable Latch) bit is set/reset by the
WREN/WRDI commands. When set to 1, the device is in a
Write Enable state and when set to 0, the device is in a Write
Disable state.
The BP0 and BP1 (Block Protect) bits determine which
blocks are currently write protected. They are set by the user
with the WRSR command and are non−volatile. The user is
allowed to protect a quarter, one half or the entire memory,
by setting these bits according to Table 12. The protected
blocks then become read−only.
The WPEN (Write Protect Enable) bit acts as an enable for
the WP pin. Hardware write protection is enabled when the
WP pin is low and the WPEN bit is 1. This condition
prevents writing to the status register and to the block
Table 11. STATUS REGISTER
7
6
5
0
4
3
2
1
0
WPEN
IPL*
LIP*
BP1
BP0
WEL
RDY
*The IPL and LIP bits are available for the New Product only. The Status Register bit 6 and bit 4 are set to “0” for the older product revisions.
Table 12. BLOCK PROTECTION BITS
Status Register Bits
BP1
BP0
Array Address Protected
None
Protection
No Protection
0
0
1
1
0
1
0
1
3000−3FFF
Quarter Array Protection
Half Array Protection
Full Array Protection
2000−3FFF
0000−3FFF
Table 13. WRITE PROTECT CONDITIONS
WPEN
WP
X
WEL
Protected Blocks
Protected
Unprotected Blocks
Status Register
Protected
Writable
0
0
1
1
X
X
0
1
0
1
0
1
Protected
Writable
Protected
Writable
Protected
Writable
X
Protected
Low
Low
High
High
Protected
Protected
Protected
Protected
Writable
Protected
Protected
Protected
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CAT25128
WRITE OPERATIONS
The CAT25128 device powers up into a write disable
instruction to the CAT25128. Care must be taken to take the
CS input high after the WREN instruction, as otherwise the
Write Enable Latch will not be properly set. WREN timing
is illustrated in Figure 3. The WREN instruction must be
sent prior to any WRITE or WRSR instruction.
The internal write enable latch is reset by sending the
WRDI instruction as shown in Figure 4. Disabling write
operations by resetting the WEL bit, will protect the device
against inadvertent writes.
state. The device contains a Write Enable Latch (WEL)
which must be set before attempting to write to the memory
array or to the status register. In addition, the address of the
memory location(s) to be written must be outside the
protected area, as defined by BP0 and BP1 bits from the
status register.
Write Enable and Write Disable
The internal Write Enable Latch and the corresponding
Status Register WEL bit are set by sending the WREN
CS
SCK
1
1
0
SI
0
0
0
0
0
HIGH IMPEDANCE
SO
Dashed Line = mode (1, 1)
Figure 3. WREN Timing
CS
SCK
1
0
0
SI
0
0
0
0
0
HIGH IMPEDANCE
SO
Dashed Line = mode (1, 1)
Figure 4. WRDI Timing
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CAT25128
Byte Write
Following completion of the write cycle, the CAT25128 is
automatically returned to the write disable state.
Once the WEL bit is set, the user may execute a write
sequence, by sending a WRITE instruction, a 16−bit address
and data as shown in Figure 5. Only 14 significant address
bits are used by the CAT25128. The rest are don’t care bits,
as shown in Table 14. Internal programming will start after
the low to high CS transition. During an internal write cycle,
all commands, except for RDSR (Read Status Register) will
be ignored. The RDY bit will indicate if the internal write
cycle is in progress (RDY high), or the device is ready to
accept commands (RDY low).
Write Identification Page
The additional 64−byte Identification Page (IP) can be
written with user data using the same Write commands
sequence as used for Page Write to the main memory array
(Figure 6). The IPL bit from the Status Register must be set
(IPL = 1) using the WRSR instruction, before attempting
to write to the IP.
The address bits [A15:A6] are Don’t Care and the
[A5:A0] bits define the byte address within the
Identification Page. In addition, the Byte Address must point
to a location outside the protected area defined by the BP1,
BP0 bits from the Status Register. When the full memory
array is write protected (BP1, BP0 = 1,1), the write
instruction to the IP is not accepted and not executed.
Also, the write to the IP is not accepted if the LIP bit from
the Status Register is set to 1 (the page is locked in
Read−only mode).
Page Write
After sending the first data byte to the CAT25128, the host
may continue sending data, up to a total of 64 bytes,
according to timing shown in Figure 6. After each data byte,
the lower order address bits are automatically incremented,
while the higher order address bits (page address) remain
unchanged. If during this process the end of page is
exceeded, then loading will “roll over” to the first byte in the
page, thus possibly overwriting previously loaded data.
Table 14. BYTE ADDRESS
Address Significant Bits
Address Don’t Care Bits
A15 − A14
# Address Clock Pulses
Main Memory Array
Identification Page*
*New Product only.
A13 − A0
A5 − A0
16
16
A15 − A6
CS
0
1
2
3
4
5
6
7
8
21 22 23 24 25 26 27 28 29 30 31
SCK
OPCODE
DATA IN
BYTE ADDRESS*
D7 D6 D5 D4 D3 D2 D1 D0
SI
0
0
0
0
0
0
1
0
A
N
A
0
HIGH IMPEDANCE
Dashed Line = mode (1, 1)
SO
* Please check the Byte Address Table (Table 14)
Figure 5. Byte WRITE Timing
CS
24+(N−1)x8−1 .. 24+(N−1)x8
21 22 23 24−31 32−39
0
1
2
3
4
5
6
7
8
24+Nx8−1
SCK
SI
Data Byte N
7..1
BYTE ADDRESS*
OPCODE
DATA IN
A
N
A
0
0
0
0
0
0
0
1
0
0
Data Data Data
Byte 1 Byte 2 Byte 3
HIGH IMPEDANCE
SO
Dashed Line = mode (1, 1)
* Please check the Byte Address Table (Table 14)
Figure 6. Page WRITE Timing
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9
CAT25128
Write Status Register
Write Protection
The Status Register is written by sending a WRSR
instruction according to timing shown in Figure 7. Only bits
2, 3, 4, 6 and 7 can be written using the WRSR command.
The Write Protect (WP) pin can be used to protect the
Block Protect bits BP0 and BP1 against being inadvertently
altered. When WP is low and the WPEN bit is set to “1”,
write operations to the Status Register are inhibited. WP
going low while CS is still low will interrupt a write to the
status register. If the internal write cycle has already been
initiated, WP going low will have no effect on any write
operation to the Status Register. The WP pin function is
blocked when the WPEN bit is set to “0”. The WP input
timing is shown in Figure 8.
CS
0
1
2
3
4
5
6
7
1
8
9
6
10
5
11
4
12
13
2
14
1
15
0
SCK
SI
OPCODE
0
DATA IN
3
0
0
0
0
0
0
7
MSB
HIGH IMPEDANCE
Dashed Line = mode (1, 1)
SO
Figure 7. WRSR Timing
t
t
WPH
WPS
CS
SCK
WP
WP
Dashed Line = mode (1, 1)
Figure 8. WP Timing
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10
CAT25128
READ OPERATIONS
Read from Memory Array
address register defined by [A5:A0] bits is automatically
incremented and the next data byte from the IP is shifted out.
The byte address must not exceed the 64−byte page
boundary.
To read from memory, the host sends a READ instruction
followed by a 16−bit address (see Table 14 for the number
of significant address bits).
After receiving the last address bit, the CAT25128 will
respond by shifting out data on the SO pin (as shown in
Figure 9). Sequentially stored data can be read out by simply
continuing to run the clock. The internal address pointer is
automatically incremented to the next higher address as data
is shifted out. After reaching the highest memory address,
the address counter “rolls over” to the lowest memory
address, and the read cycle can be continued indefinitely.
The read operation is terminated by taking CS high.
Read Status Register
To read the status register, the host simply sends a RDSR
command. After receiving the last bit of the command, the
CAT25128 will shift out the contents of the status register on
the SO pin (Figure 10). The status register may be read at
any time, including during an internal write cycle. While the
internal write cycle is in progress, the RDSR command will
output the full content of the status register (New product,
Rev. E) or the RDY (Ready) bit only (i.e., data out = FFh) for
previous product revisions C, D (Mature product). For easy
detection of the internal write cycle completion, both during
writing to the memory array and to the status register, we
recommend sampling the RDY bit only through the polling
routine. After detecting the RDY bit “0”, the next RDSR
instruction will always output the expected content of the
status register.
Read Identification Page
Reading the additional 64−byte Identification Page (IP) is
achieved using the same Read command sequence as used
for Read from main memory array (Figure 9). The IPL bit
from the Status Register must be set (IPL = 1) before
attempting to read from the IP. The [A5:A0] are the address
significant bits that point to the data byte shifted out on the
SO pin. If the CS continues to be held low, the internal
CS
20 21 22 23 24 25 26 27 28 29 30
0
1
2
3
4
5
6
7
8
9
10
SCK
SI
OPCODE
BYTE ADDRESS*
A
0
A
N
0
0
0
0
0
0
1
1
DATA OUT
HIGH IMPEDANCE
SO
7
6
5
4
3
2
1
0
Dashed Line = mode (1, 1)
* Please check the Byte Address Table (Table 14)
MSB
Figure 9. READ Timing
CS
0
1
2
3
4
5
1
6
0
7
1
8
9
10
11
12
13
14
SCK
OPCODE
0
0
0
0
0
SI
DATA OUT
3
HIGH IMPEDANCE
Dashed Line = mode (1, 1)
5
7
6
4
2
1
0
SO
MSB
Figure 10. RDSR Timing
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11
CAT25128
Hold Operation
The CAT25128 device powers up in a write disable state
and in a low power standby mode. A WREN instruction
must be issued prior to any writes to the device.
The HOLD input can be used to pause communication
between host and CAT25128. To pause, HOLD must be
taken low while SCK is low (Figure 11). During the hold
condition the device must remain selected (CS low). During
the pause, the data output pin (SO) is tri−stated (high
impedance) and SI transitions are ignored. To resume
communication, HOLD must be taken high while SCK is low.
After power up, the CS pin must be brought low to enter
a ready state and receive an instruction. After a successful
byte/page write or status register write, the device goes into
a write disable mode. The CS input must be set high after the
proper number of clock cycles to start the internal write
cycle. Access to the memory array during an internal write
cycle is ignored and programming is continued. Any invalid
op−code will be ignored and the serial output pin (SO) will
remain in the high impedance state.
Design Considerations
The CAT25128 device incorporates Power−On Reset
(POR) circuitry which protects the internal logic against
powering up in the wrong state. The device will power up
into Standby mode after VCC exceeds the POR trigger level
and will power down into Reset mode when VCC drops
below the POR trigger level. This bi−directional POR
behavior protects the device against ‘brown−out’ failure
following a temporary loss of power.
Delivery State
The CAT25128 is shipped erased, i.e., all bytes are FFh.
CS
t
t
CD
CD
SCK
t
HD
t
HD
HOLD
SO
t
HZ
HIGH IMPEDANCE
t
LZ
Dashed Line = mode (1, 1)
Figure 11. HOLD Timing
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12
CAT25128
PACKAGE DIMENSIONS
PDIP−8, 300 mils
CASE 646AA−01
ISSUE A
SYMBOL
MIN
NOM
MAX
A
5.33
A1
A2
b
0.38
2.92
0.36
3.30
0.46
1.52
0.25
9.27
4.95
0.56
1.78
0.36
10.16
b2
c
1.14
0.20
9.02
E1
D
E
E1
e
7.62
6.10
7.87
6.35
8.25
7.11
2.54 BSC
7.87
2.92
10.92
3.80
eB
L
PIN # 1
IDENTIFICATION
3.30
D
TOP VIEW
E
A2
A1
A
c
b2
L
eB
e
b
SIDE VIEW
END VIEW
Notes:
(1) All dimensions are in millimeters.
(2) Complies with JEDEC MS-001.
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13
CAT25128
PACKAGE DIMENSIONS
SOIC 8, 150 mils
CASE 751BD−01
ISSUE O
SYMBOL
MIN
NOM
MAX
1.35
A
A1
b
1.75
0.25
0.51
0.25
0.10
0.33
0.19
c
E1
E
D
E
E1
e
4.80
5.80
3.80
5.00
6.20
4.00
1.27 BSC
h
0.25
0.40
0º
0.50
1.27
8º
L
PIN # 1
IDENTIFICATION
θ
TOP VIEW
D
h
A1
θ
A
c
e
b
L
SIDE VIEW
END VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MS-012.
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14
CAT25128
PACKAGE DIMENSIONS
SOIC−8, 208 mils
CASE 751BE−01
ISSUE O
SYMBOL
MIN
NOM
MAX
A
A1
b
2.03
0.25
0.48
0.25
5.33
8.26
5.38
0.05
0.36
0.19
5.13
7.75
5.13
c
E
E1
D
E
E1
e
1.27 BSC
0.51
0.76
L
0º
8º
θ
PIN#1 IDENTIFICATION
TOP VIEW
D
A
q
e
b
L
c
A1
SIDE VIEW
END VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with EIAJ EDR-7320.
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15
CAT25128
PACKAGE DIMENSIONS
TSSOP8, 4.4x3
CASE 948AL−01
ISSUE O
b
SYMBOL
MIN
NOM
MAX
A
A1
A2
b
1.20
0.15
1.05
0.30
0.20
3.10
6.50
4.50
0.05
0.80
0.19
0.09
2.90
6.30
4.30
0.90
E
c
E1
D
3.00
6.40
E
E1
e
4.40
0.65 BSC
1.00 REF
0.60
L
L1
0.50
0.75
0º
8º
θ
e
TOP VIEW
D
c
A2
A
q1
A1
L1
L
SIDE VIEW
END VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MO-153.
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16
CAT25128
PACKAGE DIMENSIONS
TDFN8, 2x3
CASE 511AK−01
ISSUE A
D
A
e
b
E2
E
PIN#1
IDENTIFICATION
A1
PIN#1 INDEX AREA
D2
L
TOP VIEW
SIDE VIEW
BOTTOM VIEW
SYMBOL
MIN
0.70
0.00
0.45
NOM
MAX
0.80
0.05
0.65
A
A1
A2
A3
b
0.75
0.02
A2
0.55
0.20 REF
0.25
A3
0.20
1.90
1.30
2.90
1.20
0.30
2.10
1.50
3.10
1.40
D
2.00
FRONT VIEW
D2
E
1.40
3.00
E2
e
1.30
0.50 TYP
0.30
L
0.20
0.40
Notes:
(1) All dimensions are in millimeters.
(2) Complies with JEDEC MO-229.
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17
CAT25128
PACKAGE DIMENSIONS
UDFN8, 2x3 EXTENDED PAD
CASE 517AZ−01
ISSUE O
b
D
e
A
L
DAP SIZE 1.8 x 1.8
E2
E
PIN #1
IDENTIFICATION
A1
PIN #1 INDEX AREA
D2
TOP VIEW
SIDE VIEW
BOTTOM VIEW
SYMBOL
MIN
0.45
0.00
NOM
MAX
A
A1
A3
b
0.50
0.02
0.55
0.05
0.127 REF
0.25
A3
A
DETAIL A
0.065 REF
0.20
1.95
1.35
2.95
1.25
0.30
2.05
1.45
3.05
1.35
D
2.00
FRONT VIEW
D2
E
1.40
3.00
E2
e
1.30
0.50 REF
0.30
L
0.25
0.35
0.065 REF
Copper Exposed
A3 0.0 - 0.05
DETAIL A
Notes:
(1) ꢀAll dimensions are in millimeters.
(2) Refer JEDEC MO-236/MO-252.
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18
CAT25128
Table 15. ORDERING INFORMATION (Notes 15 − 18)
Specific
Device
Marking*
Package
Type
Device Order Number
Temperature Range
Lead Finish
Shipping (Note 20)
CAT25128LI−G
25128E
PDIP−8
TSSOP−8
TSSOP−8
TSSOP−8
TSSOP−8
UDFN−8
UDFN−8
I = Industrial
NiPdAu
Tube, 50 Units / Tube
(−40°C to +85°C)
CAT25128YI−G
S28E
I = Industrial
(−40°C to +85°C)
NiPdAu
NiPdAu
NiPdAu
NiPdAu
NiPdAu
NiPdAu
NiPdAu
NiPdAu
NiPdAu
NiPdAu
NiPdAu
NiPdAu
Matte−Tin
Matte−Tin
Tube, 100 Units / Tube
CAT25128YI−GT3
CAT25128YE−G
S28E
I = Industrial
(−40°C to +85°C)
Tape & Reel,
3,000 Units / Reel
S28E
E = Extended
(−40°C to +125°C)
Tube, 100 Units / Tube
CAT25128YE−GT3
CAT25128HU4I−GT3
CAT25128HU4E−GT3
CAT25128VI−G
S28E
E = Extended
(−40°C to +125°C)
Tape & Reel,
3,000 Units / Reel
S7U
I = Industrial
(−40°C to +85°C)
Tape & Reel,
3,000 Units / Reel
S7U
E = Extended
(−40°C to +125°C)
Tape & Reel,
3,000 Units / Reel
25128E
25128E
25128E
25128E
S7T
SOIC−8,
JEDEC
I = Industrial
(−40°C to +85°C)
Tube, 100 Units / Tube
CAT25128VI−GT3
CAT25128VE−G
SOIC−8,
JEDEC
I = Industrial
(−40°C to +85°C)
Tape & Reel,
3,000 Units / Reel
SOIC−8,
JEDEC
E = Extended
(−40°C to +125°C)
Tube, 100 Units / Tube
CAT25128VE−GT3
SOIC−8,
JEDEC
E = Extended
(−40°C to +125°C)
Tape & Reel,
3,000 Units / Reel
CAT25128VP2I−GT3
(Note 19)
TDFN−8
I = Industrial
(−40°C to +85°C)
Tape & Reel,
3,000 Units / Reel
CAT25128VP2E−GT3
(Note 19)
S7T
TDFN−8
E = Extended
(−40°C to +125°C)
Tape & Reel,
3,000 Units / Reel
CAT25128XI−T2
25128E
25128E
SOIC−8,
JEDEC
I = Industrial
(−40°C to +85°C)
Tape & Reel,
2,000 Units / Reel
CAT25128XE−T2
SOIC−8,
JEDEC
E = Extended
(−40°C to +125°C)
Tape & Reel,
2,000 Units / Reel
15.All packages are RoHS−compliant (Lead-free, Halogen-free).
16.The standard lead finish is NiPdAu.
17.For additional package and temperature options, please contact your nearest ON Semiconductor Sales office.
18.For detailed information and a breakdown of device nomenclature and numbering systems, please see the ON Semiconductor Device
Nomenclature document, TND310/D, available at www.onsemi.com
19.The TDFN 2x3 (VP2) package is not recommended for new design. Please replace with UDFN 2x3 (HU4).
20.For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
* Marking for New Product (Rev E)
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19
CAT25128
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks,
copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC
reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any
particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without
limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications
and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC
does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for
surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where
personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and
its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly,
any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture
of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
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Order Literature: http://www.onsemi.com/orderlit
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Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
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Email: orderlit@onsemi.com
For additional information, please contact your local
Sales Representative
CAT25128/D
相关型号：
CAT25128VET3
16KX8 SPI BUS SERIAL EEPROM, PDSO8, 0.150 INCH, HALOGEN FREE AND ROHS COMPLIANT, MS-012, SOIC-8
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