25LC256-E/SN16KVAO

Overview

The Microchip Technology 25LC256-E/SN16KVAO is a 256 Kbit (32,768 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. The device features a 64-byte page size, self-timed erase/write cycles with a maximum duration of 5 ms, and high reliability including 1,000,000 erase/write cycles and data retention exceeding 200 years. It is housed in an 8-lead SOIC package and qualified for automotive applications under AEC-Q100 standards.

Feature Summary

• Integrated block write protection allowing selective array segment locking
• Built-in power-on/off data protection circuitry with write enable latch
• Hold pin functionality to pause serial communication without sequence reset

Applications

• Automotive electronic systems requiring AEC-Q100 qualification
• Microcontroller-based data logging and configuration storage
• Industrial control systems needing non-volatile memory retention

Procurement Notes

Verify the specific suffix '16KVAO' against official Microchip documentation to confirm packaging details such as reel quantity or tape specifications. Ensure the extended temperature grade (-40°C to +125°C) matches system requirements. Confirm RoHS compliance status through current datasheets or environmental files before finalizing procurement orders.

Selection Notes

Select this component when SPI interface compatibility is required alongside high endurance and long-term data retention. The extended temperature range makes it suitable for harsh environments. Consider the 64-byte page write limit and block protection features for application-specific security needs. Verify voltage levels align with the 2.5V to 5.5V operating range.

Part Context

This part belongs to the 25LC256 family of serial EEPROMs from Microchip Technology. It shares functional characteristics with other variants like the 25AA256 but differs in supply voltage ranges. The 'E' designation indicates extended temperature operation, while 'SN' specifies the 8-lead SOIC package type. It is designed for direct interfacing with popular microcontroller families.

Replacement Considerations

Check for compatible parts within the same 25LC256 family offering different packages or temperature grades. Verify that any substitute maintains SPI compatibility and similar electrical characteristics. Ensure the replacement meets AEC-Q100 requirements if automotive qualification is necessary.