25LC128T-I/SM

Overview

The Microchip Technology 25LC128T-I/SM is a 128 Kbit (16,384 x 8-bit) Serial Electrically Erasable PROM accessed via an SPI-compatible serial bus. It operates within a voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz at 5.5V. The device features a 64-byte page buffer, self-timed erase/write cycles with a maximum duration of 5 ms, and industrial temperature operation from -40°C to +85°C. It is housed in an 8-lead SOIJ package.

Feature Summary

• Supports high-speed SPI communication with a maximum clock frequency of 10 MHz.
• Includes hardware write protection via the WP pin and software block protection for array segments.
• Features power-on/off data protection circuitry and a write enable latch to prevent inadvertent writes.
• Provides a HOLD input to suspend serial transmission without resetting the sequence.

Applications

• Data storage in microcontroller systems requiring non-volatile memory
• Industrial control applications operating within specified temperature ranges
• Embedded systems utilizing SPI interfaces for configuration or parameter storage

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm RoHS compliance status and ensure the component meets AEC-Q100 requirements if automotive qualification is necessary. Check datasheet revisions for any recent packaging or electrical characteristic updates before finalizing procurement specifications.

Selection Notes

Select this component when a 128 Kbit capacity is required with SPI interface compatibility. Ensure the system voltage falls within the 2.5V to 5.5V operational range. Consider the 64-byte page size for write efficiency and verify that the industrial temperature range (-40°C to +85°C) aligns with the application environment constraints.

Part Context

This part belongs to the 25AA128/25LC128 family of 128 Kbit SPI Serial EEPROMs. The 'LC' designation indicates a 2.5V minimum supply voltage, distinguishing it from the 'AA' variant which supports lower voltages. The 'I' suffix denotes the industrial temperature range, while 'SM' specifies the 8-lead SOIJ package format.

Replacement Considerations

The 25LC128T-I/ST is a direct replacement offering the same electrical characteristics in an 8-TSSOP package. Verify that the target PCB footprint accommodates the TSSOP dimensions if substituting the SM package with the ST package variant.