AT25640AN-10SI-2.7

Memory IC Overview

The AT25640AN-10SI-2.7 is a serial electrically-erasable programmable read-only memory (EEPROM) device manufactured by Microchip Technology, formerly Atmel. It provides 65536 bits of storage organized as 8192 words of 8 bits each. The component utilizes a Serial Peripheral Interface (SPI) compatible interface supporting Modes 0 and 3. It operates within a supply voltage range of 2.7V to 5.5V and supports clock rates up to 20 MHz at 5V. The device features a self-timed write cycle with a maximum duration of 5 ms and includes block write protection capabilities.

Memory IC Feature Summary

• Supports SPI Modes 0 and 3 for synchronous serial communication
• Includes hardware and software data protection via Write Protect pin and instructions
• Features 32-byte page mode for efficient sequential data writing
• Provides non-volatile block write protection for one-quarter, one-half, or the entire array

Memory IC Applications

• Industrial applications requiring low-power operation
• Commercial applications utilizing low-voltage logic
• Systems interfacing with 6805 and 68HC11 microcontrollers
• Data logging and configuration storage in embedded systems

Memory IC Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature range. The 'N' indicates lead-free/halogen-free status, while 'SI' denotes an 8-lead JEDEC SOIC package. Confirm the '-2.7' suffix matches the required operating voltage range of 2.7V to 5.5V. Ensure compatibility with the target system's SPI interface modes and voltage levels before integration.

Memory IC Selection Notes

Select this component when a 64K-bit EEPROM with SPI interface is required. The -2.7 suffix specifies the minimum operating voltage of 2.7V. Consider the 8-lead SOIC package for surface mount assembly. Verify that the application requires the industrial temperature range (-40°C to +85°C) provided by this specific variant.

Memory IC Part Context

This part belongs to the AT25080A/160A/320A/640A family of SPI Serial EEPROMs. These devices are designed for low-power and low-voltage operations. The family shares common instruction sets and functional characteristics, differing primarily in memory density and package options. The AT25640A represents the highest density option in this specific series.

Memory IC Replacement Considerations

Cross-reference tools suggest checking equivalent parts from other manufacturers. However, verify pinout compatibility, specifically the HOLD and WP pins, and ensure the replacement supports the same SPI modes and voltage ranges.