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Features
? Serial Peripheral Interface (SPI) Compatible
? Supports SPI Modes 0 (0,0) and 3 (1,1)
? Low-voltage and Standard-voltage Operation
– 2.7 (V CC = 2.7V to 5.5V)
– 1.8 (V CC = 1.8V to 5.5V)
?
?
?
3.0 MHz Clock Rate (5V)
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: One Million Write Cycles
– Data Retention: 100 Years
Automotive Grade Devices Available
8-lead PDIP, 8-lead JEDEC SOIC and 14-lead TSSOP Packages
SPI Serial
EEPROMs
8K (1024 x 8)
16K (2048 x 8)
Description
The AT25080/160/320/640 provides 8192/16384/32768/65536 bits of serial electri-
cally-e ra sa ble pro gramma ble re ad on ly memo r y ( EEPROM ) or ga nize d a s
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-lead PDIP, 8-
lead JEDEC SOIC and 14-lead TSSOP packages.
The AT25080/160/320/640 is enabled through the Chip Select pin (CS) and accessed
via a 3-wire interface consisting of Serial Data Input (SI), Serial Data Output (SO), and
Serial Clock (SCK). All programming cycles are completely self-timed, and no sepa-
rate ERASE cycle is required before WRITE.
32K (4096 x 8)
64K (8192 x 8)
AT25080
AT25160
AT25320
AT25640
Pin Configuration
8-lead PDIP
Pin Name
CS
Function
Chip Select
CS
SO
WP
GND
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
SCK
Serial Data Clock
SI
Serial Data Input
8-lead SOIC
SO
GND
VCC
Serial Data Output
Ground
Power Supply
CS
SO
WP
GND
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
WP
HOLD
Write Protect
Suspends Serial Input
14-lead TSSOP
CS
1
14
VCC
NC
DC
No Connect
Don’t Connect
SO
NC
NC
NC
WP
GND
2
3
4
5
6
7
13
12
11
10
9
8
HOLD
NC
NC
NC
SCK
SI
0675M–SEEPR–9/03
1
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