25LC128XT-I/ST

Overview

The Microchip Technology 25LC128XT-I/ST is a 128 Kbit Serial Electrically Erasable PROM accessed via an SPI-compatible serial bus. It features a 16,384 x 8-bit organization with a 64-byte page size. The device operates within a supply voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz. It includes self-timed erase and write cycles with a maximum duration of 5 ms. The component offers block write protection for none, 1/4, 1/2, or all of the array and provides built-in power-on/off data protection. It is housed in an 8-lead TSSOP package.

Feature Summary

• Supports high-speed SPI communication with a maximum clock frequency of 10 MHz.
• Includes hardware write-protect pin and software-controlled block protection for specific array segments.
• Features built-in power-on/off data protection circuitry and a write enable latch.
• Provides hold functionality to pause serial transmission without resetting the sequence.

Applications

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

Procurement Notes

Verify the exact part number against official Microchip documentation, as the 'XT' suffix is not explicitly defined in the provided datasheet for this series. Confirm temperature grade and package details match project requirements. Ensure compatibility with system voltage levels and SPI protocol settings before integration.

Selection Notes

Select this component for applications requiring 128 Kbit of non-volatile storage with SPI interface. Consider the 2.5V to 5.5V operating voltage range and industrial temperature specifications. Evaluate the need for hardware write protection and page write capabilities when designing the system architecture.

Part Context

This device belongs to the 25XX128 family of Serial EEPROMs from Microchip Technology. It shares functional similarities with the 25AA128 but differs in operating voltage ranges and temperature grades. The family is designed for direct interfacing with popular microcontroller families supporting SPI protocols.

Replacement Considerations

Public confirmed substitute part numbers: 25LC128T-I/ST, 25LC128-E/ST, 25LC128-I/P.