25LC128X-I/ST

Overview

The Microchip Technology 25LC128X-I/ST is a 128 Kbit (16,384 x 8-bit) Serial Electrically Erasable PROM accessed via an SPI-compatible serial bus. It operates within a supply voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz at higher voltages. The device features a 64-byte page buffer for efficient data writing and includes self-timed erase/write cycles with a maximum duration of 5 ms. It is housed in an 8-lead TSSOP package and is rated for industrial temperature operation from -40°C to +85°C.

Feature Summary

• Integrated hardware write protection mechanisms including a dedicated WP pin and software-configurable block protection bits.

Applications

• Configuration data storage in microcontroller systems
• Calibration parameter persistence
• Device identification and tracking information

Procurement Notes

Verify the specific suffix 'X' against official Microchip documentation to confirm if it denotes a standard variant or a specific revision, as datasheets primarily reference 25LC128-I/ST. Ensure the Industrial temperature grade (-40°C to +85°C) matches application requirements. Confirm RoHS compliance status for the specific manufacturing lot.

Selection Notes

Select this component when a non-volatile memory solution requires SPI interface compatibility with standard microcontrollers. It is suitable for applications needing moderate storage density with robust write protection features. Consider the 64-byte page size limitation for write operations and ensure the system voltage aligns with the 2.5V to 5.5V operating range.

Part Context

This part belongs to the 25LC128 family of serial EEPROMs from Microchip Technology. It shares functional similarities with the 25AA128 but differs in minimum operating voltage and temperature range specifications. The family is designed for low-power, high-reliability data storage applications requiring simple serial communication protocols.

Replacement Considerations

25LC128-I/ST