25LC080B-E/ST

Overview

The Microchip Technology 25LC080B-E/ST is an 8 Kbit (1024 x 8) Serial Electrically Erasable PROM featuring a 32-byte page size. It operates on a 2.5V to 5.5V supply voltage with a maximum clock frequency of 10 MHz. The device utilizes a standard SPI-compatible interface and supports an industrial temperature range of -40°C to +125°C. It is housed in an 8-lead TSSOP package.

Feature Summary

• Supports 32-byte page write operations for efficient data storage
• Includes hardware write protection via the WP pin and software block protection
• Features self-timed erase and write cycles with automatic latch reset
• Provides high reliability with over one million erase/write cycle endurance

Applications

• Microcontroller system configuration storage
• Calibration parameter retention
• Data logging applications requiring non-volatile memory

Procurement Notes

Verify that the 'B' suffix corresponds to the 32-byte page size variant, distinct from the 'A' version's 16-byte pages. Confirm the '-E' suffix indicates the automotive-grade temperature range (-40°C to +125°C). Ensure the '/ST' designation matches the required 8-lead TSSOP package for your PCB layout.

Selection Notes

Select this component when a 32-byte page buffer is required for optimized write performance compared to the 16-byte 'A' series. The '-E' rating ensures operation at elevated temperatures up to +125°C. Verify that the host microcontroller supports the necessary SPI modes and voltage levels within the 2.5V to 5.5V operating range.

Part Context

This part belongs to the 25LC080 family of 8 Kbit SPI EEPROMs. The 'B' revision specifically increases the page size to 32 bytes, improving write throughput over previous versions. It shares the same pinout and instruction set as the 25LC080A but differs in page architecture and temperature grading.

Replacement Considerations

• 25LC080A-E/ST

FAQ

What is the difference between the 25LC080A and 25LC080B page sizes?

The 25LC080B supports a 32-byte page size, whereas the 25LC080A is limited to a 16-byte page size.

How does the HOLD pin function during serial communication?

Pulling the HOLD pin low pauses serial communication without resetting the sequence, allowing the host to service higher priority interrupts. Communication resumes when the pin is pulled high while SCK is low.