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Description

The AT25128/256 provides 131,072/262,144 bits of serial electrically-erasable programmable read only memory (EEPROM) organized as 16,384/32,768 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 devices are available in space saving 8-lead PDIP (AT25128/256), 8-lead EIAJ SOIC (AT25128/256), 8-lead and 16-lead JEDEC SOIC (AT25128), 14-lead TSSOP (AT25128), 20-lead TSSOP (AT25128/256), and 8-lead Leadless Array (AT25256) packages. In addition, the entire family is available in 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 5.5V) versions.

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 MHz Clock Rate

? 64-byte Page Mode and Byte Write Operation

? 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 Write Cycles

– Data Retention: >200 Years

? Automotive Grade, Extended Temperature and Lead-Free Devices Available

? 8-lead PDIP, 8-lead EIAJ SOIC, 8-lead and 16-lead JEDEC SOIC, 14-lead and 20-lead TSSOP, and 8-lead Leadless Array Packages