25LC128T-I/SN

Overview

The Microchip Technology 25LC128T-I/SN is a 128 Kbit Serial Electrically Erasable PROM featuring a 16,384 x 8-bit organization. It operates via an SPI-compatible serial bus with a maximum clock frequency of 10 MHz at VCC voltages between 4.5V and 5.5V. The device supports a supply voltage range of 2.5V to 5.5V and utilizes an 8-lead SOIC package. It functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Supports self-timed erase and write cycles with a maximum duration of 5 ms.
• Includes built-in hardware write protection via the WP pin and software block protection for none, 1/4, 1/2, or all of the array.
• Features power-on/off data protection circuitry and a write enable latch to prevent inadvertent writes.
• Allows serial communication suspension via the HOLD pin 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 bus interfaces

Procurement Notes

Verify that the ordering suffix 'T' corresponds to tape-and-reel packaging as indicated by distributor listings. Confirm the 'I' suffix matches the required industrial temperature range (-40°C to +85°C). Ensure the 'SN' suffix aligns with the specific 8-lead SOIC package dimensions required for the design. Cross-reference the full part number against the manufacturer's current datasheet to confirm active status and any recent package or material changes.

Selection Notes

Select this component when a 128 Kbit capacity is required with SPI interface compatibility. The 2.5V minimum supply voltage distinguishes it from lower-voltage variants like the 25AA128. The industrial temperature grade suits standard commercial and industrial environments. Consider the page size and write protection features if data integrity during power fluctuations is critical.

Part Context

This part belongs to the 25XX128 family of 128 Kbit SPI EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25AA128 but differs in its minimum operating voltage and temperature specifications. The family offers various package options including DFN, PDIP, SOIC, and TSSOP to accommodate different PCB layout requirements.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.