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Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
Low Voltage and Standard Voltage Operation
5.0 (V
CC
= 4.5V to 5.5V)
2.7 (V
CC
= 2.7V to 5.5V)
1.8 (V
CC
= 1.8V to 3.6V)
2.1 MHz Clock Rate
32-Byte Page Mode
Block Write Protection
Protect 1/4, 1/2, or Entire Array
Write Protect (WP) Pin and Write Disable Instructions for
Both Hardware and Software Data Protection
Self-Timed Write Cycle (5 ms Typical)
High Reliability
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
SPI Serial
E
2
PROMs
128K (16384 x 8)
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.
AT25128
Preliminary
(continued)
Pin Configurations
Pin Name
CS
SCK
SI
SO
GND
V
CC
WP
HOLD
NC
DC
Function
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Power Supply
Write Protect
Suspends Serial Input
No Connect
Don鈥檛 Connect
CS
SO
WP
GND
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
CS
SO
NC
NC
NC
WP
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VCC
HOLD
NC
NC
NC
SCK
SI
8-Pin PDIP
14-Pin SOIC
16-Lead SOIC
CS
SO
NC
NC
NC
NC
WP
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
HOLD
NC
NC
NC
NC
SCK
SI
NC
CS
SO
SO
NC
NC
WP
GND
DC
NC
20-Lead TSSOP*
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
NC
SCK
SI
DC
NC
* Note: Pins 3, 4 and 17, 18 are internally connected for 14-lead TSSOP socket compatibility.