鈥?/div>
鈥?5.0 (V
CC
= 4.5V to 5.5V)
鈥?2.7 (V
CC
= 2.7V to 5.5V)
3.0 MHz Clock Rate (5V)
32-byte Page Mode
Block Write Protection
鈥?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
鈥?Endurance: One Million Write Cycles
鈥?Data Retention: 100 Years
8-pin PDIP and 8-lead JEDEC SOIC Packages
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
automotive applications where low-power and low-voltage operation are essential.
The AT25080/160/320/640 is available in space saving 8-pin PDIP and 8-lead JEDEC
SOIC 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.
BLOCK WRITE protection is enabled by programming the status register with one of
four blocks of write protection. Separate program enable and program disable instruc-
tions are provided for additional data protection. Hardware data protection is provided
via the WP pin to protect against inadvertent write attempts to the status register. The
HOLD pin may be used to suspend any serial communication without resetting the
serial sequence.
SPI Serial
Automotive
EEPROMs
8K (1024 x 8)
16K (2048 x 8)
32K (4096 x 8)
64K (8192 x 8)
AT25080
AT25160
AT25320
AT25640
Pin Configuration
Pin Name
CS
SCK
SI
SO
GND
VCC
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
Rev. 3260A鈥揝EEPR鈥?2/02
CS
SO
WP
GND
8-pin PDIP
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
CS
SO
WP
GND
8-lead SOIC
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
1