25LC640A-H/SN

Overview

The Microchip Technology 25LC640A-H/SN is a 64 Kbit (8192 x 8-bit) Serial Electrically Erasable PROM housed in an 8-lead SOIC package. It operates within a voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 5 MHz. The device features a 32-byte page size, self-timed erase/write cycles with a maximum duration of 6 ms, and an extended operating temperature range from -40°C to +150°C.

Feature Summary

• Supports Serial Peripheral Interface (SPI) compatible communication via SCK, SI, SO, and CS pins.
• Includes a HOLD pin to suspend serial transmission without resetting the sequence.
• Provides hardware write protection through the WP pin and STATUS register configuration.
• Features built-in power-on/off data protection and a write enable latch.

Applications

• Microcontroller systems requiring non-volatile data storage
• Industrial applications demanding extended temperature operation
• Automotive electronics compliant with AEC-Q100 standards

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. Ensure compatibility with system voltage levels and SPI timing requirements before integration. Confirm RoHS compliance status for environmental regulations.

Selection Notes

Select this component for designs requiring high-temperature reliability up to 150°C. The 64 Kbit capacity suits moderate data logging needs. Verify that the 5 MHz speed meets system bus requirements and that the 8-lead SOIC footprint fits the PCB layout constraints.

Part Context

This part belongs to the 25LCXXX family of mid-density serial EEPROMs. It shares architectural similarities with other densities in the series but offers specific memory organization and page sizes tailored for 64 Kbit applications. The 'H' suffix denotes the extended temperature variant.

Replacement Considerations

25LC640A-I/SN