SPI Serial EEPROMs
Description
Features
• Serial Peripheral Interface (SPI) Compatible • Supports SPI Modes 0 (0,0) and 3 (1,1) • Low-voltage and Standard-voltage Operation
– 2.
7 (VCC = 2.
7V to 5.
5V) – 1.
8 (VCC = 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
Description
The AT25080/160/320/640 provides 8192/16384/32768/65536 bits of serial electrically-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-lead PDIP, 8lead 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 separate ERASE cycle is required before WRITE.
SPI Serial 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
Function Chip Select
SCK SI SO
Serial Data Clock Serial Data Input Serial Data Output
GND VCC WP HOLD
Ground Power Supply Write Protect Suspends Serial Input
NC No Connect DC Don’t Connect
8-lead PDIP
CS SO WP GND
1 2 3 4
8 VCC 7 HOLD 6 SCK 5 SI
8-lead SOIC
CS SO WP GND
1 2 3 4
8 VCC 7 HOLD 6 SCK 5 SI
14-lead TSSOP
CS SO NC NC NC WP GND
1 2 3 4 5 6 7
14 VCC 13 HOLD 12 NC 11 NC 10 NC
9 SCK 8 SI
0675M–SEEPR–9/03
1
BLOCK WRITE protection is enabled by programming the...
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