AT25080A/160A/320A/640A is 8192/16384/32768/65536-bit serial electrically-erasable programmable read-only memory (EEPROM) with low power consumption and low operating voltage, which is suitable for automotive electronics applications.
The document details the specifications for the Atmel AT25080A/160A/320A/640A family of electrically-erasable programmable read-only memory (EEPROM) devices. These components are organized as 8K, 16K, 32K, or 64K words of 8 bits each and are optimized for low-power and low-voltage operation in automotive applications.
The datasheet provides comprehensive technical information including absolute maximum ratings, DC and AC electrical characteristics, pin configurations, and a detailed description of the Serial Peripheral Interface (SPI) protocol. It covers operational modes such as read, write, status register access, and hardware/software protection mechanisms like Write Protect (WP) pins and block write protection.
| Memory Capacity (AT25080A) | 8K words of 8 bits each |
|---|---|
| Memory Capacity (AT25320A) | 32K words of 8 bits each |
| Memory Capacity (AT25640A) | 64K words of 8 bits each |
| Operating Temperature Range | -40°C to +125°C |
| Maximum Clock Rate | 5.0 MHz |
| Supply Voltage Range | +2.7V to +5.5V |
| Endurance | One Million Write Cycles |
| Data Retention | 100 Years |
The device supports SPI Modes 0 (0,0) and 3 (1,1), though this datasheet specifically describes Mode 0 operation.
The typical self-timed write cycle time is 2 ms when operating at 5V.
Protection is provided via a Write Protect (WP) pin and through separate program enable/disable instructions in software.