25LC256XT-I/ST

Overview

The Microchip Technology 25LC256XT-I/ST is a 256 Kbit (32K x 8) Serial Electrically Erasable PROM. It utilizes an SPI-compatible serial bus for data access, supporting clock frequencies up to 10 MHz. The device operates within a supply voltage range of 2.5 V to 5.5 V and features low-power CMOS technology with standby current as low as 1 µA. It includes hardware write protection, block protection, and self-timed erase/write cycles. The component is housed in an 8-lead TSSOP package and supports industrial temperature ranges.

Feature Summary

• Supports high-speed SPI communication with sequential read capabilities
• Includes built-in power-on/off data protection and write enable latch
• Features programmable block write protection for array security
• Provides hold functionality to pause serial transmission without resetting the sequence

Applications

• Microcontroller system data storage
• Configuration parameter retention
• Calibration value storage
• General-purpose non-volatile memory applications

Procurement Notes

Verify that the ordering suffix 'XT' corresponds to the specific tape-and-reel packaging or variant details defined in the official Microchip datasheet DS20001822H. Confirm the 'I' designation indicates the Industrial temperature range (-40°C to +85°C). Ensure the TSSOP package type matches the design requirements before finalizing procurement.

Selection Notes

Select this component when a 256 Kbit capacity is required with SPI interface compatibility. It is suitable for designs needing robust write protection features and low standby power consumption. Consider the TSSOP package constraints and the 2.5 V to 5.5 V operating voltage range during circuit design.

Part Context

This part belongs to the 25AA256/25LC256 family of 256 Kbit Serial EEPROMs from Microchip Technology. The family shares identical functional specifications but differs in supply voltage ranges and temperature grades. The 'L' variant typically denotes the 2.5 V to 5.5 V operation range.

Replacement Considerations

Direct substitutes include other parts within the 25LC256 family with compatible packages and temperature ratings, such as 25LC256-I/ST. Verify pinout and electrical characteristics match before substitution.