Features
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
Low Voltage and Standard Voltage Operation
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5.0 (VCC = 4.5V to 5.5V)
2.7 (VCC = 2.7V to 5.5V)
1.8 (VCC = 1.8V to 3.6V)
2.1 MHz Clock Rate
32-Byte Page Mode
Block Write Protection
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Protect 1/4, 1/2, or Entire Array
SPI Serial
E2PROMs
128K (16384 x 8)
Write Protect (WP) Pin and Write Disable Instructions for
Both Hardware and Software Data Protection
Self-Timed Write Cycle (5 ms Typical)
High Reliability
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Endurance: 100,000 Cycles
Data Retention: 100 Years
Automotive Grade and Extended Temperature Devices Available
8-Pin PDIP, 14-pin, 16-pin JEDEC SOIC, and 20-Pin TSSOP Packages
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AT25128
Preliminary
Description
The AT25128 provides 131,072 bits of serial electrically erasable programmable read
only memory (EEPROM) organized as 16,384 words of 8 bits each. The device is
optimized for use in many industrial and commercial applications where low power
and low voltage operation are essential. The AT25128 is available in space saving
8-pin PDIP, JEDEC SOIC, and 14-pin and 20-pin TSSOP packages.
(continued)
Pin Configurations
Pin Name
Function
CS
Chip Select
8-Pin PDIP
14-Pin SOIC
SCK
SI
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
CS
SO
1
2
3
4
5
6
7
14
13
12
11
10
9
VCC
HOLD
NC
CS
SO
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
NC
SO
NC
NC
WP
NC
NC
GND
VCC
GND
WP
GND
SCK
SI
Power Supply
Write Protect
Suspends Serial Input
No Connect
8
WP
HOLD
NC
DC
Don’t Connect
20-Lead TSSOP*
16-Lead SOIC
NC
CS
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
NC
VCC
HOLD
HOLD
NC
CS
SO
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
SO
HOLD
NC
SO
NC
NC
NC
NC
NC
NC
NC
NC
WP
GND
DC
SCK
SI
NC
NC
WP
GND
SCK
SI
DC
NC
NC
* Note: Pins 3, 4 and 17, 18 are internally connected for 14-lead TSSOP socket compatibility.