25LC640A-I/MS

Overview

The Microchip Technology 25LC640A-I/MS is a 64-Kbit (8192 x 8-bit) Serial Electrically Erasable PROM accessed via an SPI-compatible bus. It operates within a voltage range of 2.5V to 5.5V and supports clock frequencies up to 10 MHz at higher voltages. The device features industrial temperature ratings from -40°C to +85°C and utilizes an 8-lead MSOP package.

Feature Summary

• Low-power CMOS technology with standby current as low as 1 µA
• Built-in write protection including power-on/off data protection and block write protection
• High reliability with 1,000,000 erase/write cycle endurance and over 200 years data retention

Applications

• Microcontroller system memory for storing configuration parameters
• Data logging applications requiring non-volatile storage
• Industrial control systems needing reliable data retention

Procurement Notes

Verify the specific suffix 'I' confirms the Industrial temperature range (-40°C to +85°C). Confirm the 'MS' suffix corresponds to the 8-lead MSOP package type. Ensure the '25LC' prefix indicates the 2.5V minimum operating voltage requirement rather than the 1.8V variant.

Selection Notes

Select this component when a 64-Kbit capacity is required with SPI interface compatibility. The 2.5V minimum supply voltage distinguishes it from the 25AA640A series which supports lower voltages down to 1.8V. The MSOP package is suitable for surface-mount designs requiring compact footprints.

Part Context

This part belongs to the 25XX640A family of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25AA640A but differs in its specified operating voltage range. The device is designed for direct interfacing with popular microcontroller families supporting standard SPI protocols.

Replacement Considerations

The 25AA640A-I/MS is a pin-compatible alternative within the same family, offering support for lower supply voltages down to 1.8V while maintaining identical pinouts and functionality.