25LC128T-H/SN

Overview

The Microchip Technology 25LC128T-H/SN is a mid-density serial electrically erasable programmable read-only memory (EEPROM) with a storage capacity of 128 Kbit, organized as 16,384 x 8 bits. It operates within a supply voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 5 MHz at voltages between 4.5V and 5.5V, or 3 MHz at 2.5V to less than 4.5V. The device utilizes an SPI-compatible interface and is housed in an 8-lead SOIC package. It features extended temperature operation from -40°C to +150°C.

Feature Summary

• Supports high-temperature operation up to +150°C for demanding environments
• Includes hardware write protection via the WP pin and software block protection
• Features power-on/off data protection circuitry and a write enable latch
• Allows communication suspension through the HOLD input without sequence reset

Applications

• Embedded systems requiring non-volatile data storage in high-temperature conditions
• Industrial control applications needing reliable parameter retention
• Automotive electronics components subject to extreme thermal stress

Procurement Notes

Verify that the ordering suffix 'H' corresponds to the extended temperature grade (-40°C to +150°C) and 'SN' indicates the 8-lead SOIC package. Confirm compatibility with system voltage levels, noting the 2.5V minimum requirement differs from lower-voltage variants. Ensure the design accounts for the 5 MHz maximum speed limit at higher supply voltages.

Selection Notes

Select this component when application environments exceed standard industrial temperature limits. The extended grade ensures reliability where standard commercial parts would fail. Verify that the 2.5V minimum operating voltage aligns with the system power rail, as it does not support 1.8V operation found in other EEPROM families.

Part Context

This part belongs to the 25LCXXX family of mid-density serial EEPROMs. It shares architectural similarities with other densities in the series but is distinguished by its specific 128 Kbit capacity and extended temperature rating. The device interfaces directly with microcontrollers supporting the Serial Peripheral Interface protocol.

Replacement Considerations

The 25LC128T-I/SN serves as a substitute for standard industrial temperature ranges (-40°C to +85°C). Other members of the 25LCXXX family offer different capacities but share similar interface characteristics.