25LC128T-I/ST

Overview

The Microchip Technology 25LC128T-I/ST is a 128 Kbit Serial Electrically Erasable PROM featuring an SPI-compatible interface. It utilizes low-power CMOS technology with a supply voltage range of 2.5V to 5.5V and supports clock frequencies up to 10 MHz. The device offers 1,000,000 erase/write cycle endurance and data retention exceeding 200 years. It includes self-timed write cycles of 5 ms maximum, block write protection, and built-in power-on/off data protection. Operating temperature range is -40°C to +85°C.

Feature Summary

• Supports high-speed serial communication via SPI bus with hold functionality for interrupt servicing
• Includes hardware write-protect pin and software-configurable block protection for array security
• Features built-in power-on/off data protection circuitry and write enable latch mechanisms

Applications

• Data storage in microcontroller systems requiring non-volatile memory
• Industrial control applications needing reliable parameter storage
• Embedded systems utilizing SPI interfaces for configuration data

Procurement Notes

Verify the specific suffix 'I' confirms industrial temperature range (-40°C to +85°C) and 'ST' denotes the 8-lead TSSOP package. Confirm RoHS compliance status matches project requirements. Ensure the ordering suffix does not imply different electrical characteristics than the standard datasheet unless explicitly documented by the manufacturer.

Selection Notes

Select this component when SPI interface compatibility is required alongside 128 Kbit capacity. Consider the 2.5V minimum supply voltage constraint compared to lower-voltage alternatives. Evaluate the need for hardware write protection features and page write capabilities within the application design constraints.

Part Context

This part belongs to the 25XX128 family of serial EEPROMs from Microchip Technology. It shares functional similarities with the 25AA128 but differs in supply voltage specifications. The family provides various package options including DFN, PDIP, SOIC, and TSSOP to accommodate diverse PCB layout requirements.

Replacement Considerations

25LC128T-E/SN is a verified alternative offering extended temperature range capability.