25LC640-I/SNG

Overview

The Microchip 25LC640-I/SN is a serial EEPROM featuring 64 Kbit (8K x 8) storage capacity. It utilizes an SPI interface with clock frequencies up to 10 MHz and operates within a voltage range of 2.5V to 5.5V. The device supports page writes of up to 32 bytes and offers data retention of 200 years. It functions in industrial temperatures from -40°C to +85°C and is housed in an 8-pin SOIC package.

Feature Summary

• Serial EEPROM architecture with SPI interface
• High-speed read access up to 10 MHz
• Page write capability for efficient data handling
• Industrial temperature range operation

Applications

• Data logging systems
• Configuration storage in embedded controllers
• Parameter retention in industrial equipment

Procurement Notes

Verify the exact suffix against official Microchip documentation, as 'I/SNG' may indicate specific tape-and-reel or packaging variations not standard to bulk tubes. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process before ordering.

Selection Notes

Select this component for applications requiring non-volatile memory with simple serial connectivity. Ensure the host controller supports SPI mode compatible with the device's command set. Consider the 32-byte page size when designing write algorithms to optimize performance.

Part Context

Part of the 25LC640 family of serial EEPROMs from Microchip Technology. This series provides reliable data retention and low power consumption for general-purpose memory applications where I/O pin count is limited.

Replacement Considerations

Microchip 25AA640A-I/SN offers similar functionality with extended voltage support down to 1.8V. Verify interface compatibility and package dimensions before substituting.