Features
• Serial Peripheral Interface (SPI) Compatible
• Supports SPI Modes 0 (0,0) and 3 (1,1)
• Low-voltage and Standard-voltage Operation
– 5.0 (VCC = 4.5V to 5.5V)
– 2.7 (VCC = 2.7V to 5.5V)
– 1.8 (VCC = 1.8V to 3.6V)
• 3.0 MHz Clock Rate (5V)
• 32-byte Page Mode
• Block Write Protection
– Protect 1/4, 1/2, or Entire Array
SPI Serial
EEPROMs
• Write Protect (WP) Pin and Write Disable Instructions for
both Hardware and Software Data Protection
• Self-timed Write Cycle (5 ms Typical)
• High-reliability
8K (1024 x 8)
16K (2048 x 8)
32K (4096 x 8)
64K (8192 x 8)
– Endurance: One Million Write Cycles
– Data Retention: 100 Years
• Automotive Grade and Extended Temperature Devices Available
• 8-pin PDIP, 8-lead JEDEC SOIC, and 14-lead and 20-lead TSSOP Packages
Description
The AT25080/160/320/640 provides 8192/16384/32768/65536 bits of serial electri-
cally-erasable programmable read only memory (EEPROM) organized as
1024/2048/4096/8192 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 AT25080/160/320/640 is available in space saving 8-pin PDIP, 8-
lead JEDEC SOIC, and 14-lead and 20-lead TSSOP packages.
AT25080
AT25160
AT25320
AT25640
(continued)
Pin Configuration
Pin Name
Function
8-pin PDIP
8-lead SOIC
CS
Chip Select
CS
SO
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
CS
SO
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
SCK
SI
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
WP
WP
GND
GND
SO
GND
VCC
WP
Power Supply
Write Protect
Suspends Serial Input
No Connect
14-lead TSSOP
20-lead TSSOP*
HOLD
NC
CS
1
2
3
4
5
6
7
14
13
12
11
10
9
VCC
HOLD
NC
NC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
NC
SO
NC
CS
SO
VCC
HOLD
HOLD
NC
NC
NC
SO
NC
NC
NC
DC
Don’t Connect
WP
GND
SCK
SI
NC
NC
8
WP
GND
DC
SCK
SI
DC
NC
NC
Note:
*Pins 3, 4 and 17, 18 are internally connected
for 14-lead TSSOP socket compatibility.
Rev. 0675F–08/01
1