25LC010A-E/ST

Overview

The Microchip Technology 25LC010A-E/ST is a 1 Kbit (128 x 8) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It operates within a supply voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz. The device utilizes an SPI-compatible serial bus for communication, featuring a write page mode capable of handling up to 16 bytes per cycle. It includes self-timed erase and write cycles with a maximum duration of 5 ms. The component is housed in an 8-lead TSSOP package and is rated for an industrial temperature range of -40°C to +125°C.

Feature Summary

• Supports block write protection allowing selection of none, one-quarter, one-half, or the entire array.
• Includes built-in power-on/off data protection circuitry and a dedicated write-protect pin.
• Features a hold input that suspends transmission without resetting the serial sequence.

Applications

• Microcontroller system configuration storage
• Calibration parameter retention
• Data logging applications

Procurement Notes

Verify the specific suffix 'E' indicates the automotive temperature grade (-40°C to +125°C) and 'ST' denotes the 8-lead TSSOP package. Confirm RoHS compliance status and ensure the ordering quantity matches the manufacturer's standard tube packaging requirements for this specific package type.

Selection Notes

Select this part when an SPI interface is required for non-volatile storage in high-temperature environments. Ensure the application voltage remains above 2.5V. Consider the 16-byte page write limit and verify that the host controller can manage the internal write cycle timing via status register polling.

Part Context

This component belongs to the 25LC010A series of 1 Kbit SPI EEPROMs from Microchip Technology. It shares architectural similarities with the 25AA010A but differs in minimum operating voltage. The 'E' suffix designates the extended temperature range variant suitable for demanding industrial conditions.

Replacement Considerations

The 25LC010A-I/ST serves as a direct functional substitute with identical specifications except for a reduced maximum operating temperature of +85°C. Verify package compatibility and temperature ratings before substitution.

FAQ

How does the HOLD pin function during operation?

The HOLD pin allows the user to pause serial communication without resetting the sequence. Transitions on SI, SCK, and SO are ignored while held low, and communication resumes when the pin is brought high while SCK is low.

What happens if a page write crosses a physical boundary?

If a page write attempts to cross a physical page boundary, the data wraps around to the beginning of the current page, overwriting existing data instead of proceeding to the next page.