25A512T-I/ST

Memory IC Overview

The Microchip Technology 25A512T-I/ST is a 512 Kbit (64K x 8) serial EEPROM utilizing an SPI-compatible interface. It operates within a supply voltage range of 1.7V to 3.0V and supports clock frequencies up to 10 MHz at 2.0V or higher. The device features a 128-byte page size, sector write protection for 16KB segments, and hardware data protection circuits. It offers high reliability with one million erase/write cycles and over 200 years of data retention. Available in TSSOP-8 packages, it functions across the industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports byte, page, sector, and chip erase operations via SPI protocol without requiring prior sector erasure for writes.
• Includes programmable sector write protection allowing selective locking of memory blocks.
• Features built-in power-on/off data protection and a dedicated hold pin to pause serial communication.

Memory IC Applications

• Data logging and storage in industrial sensor networks
• Configuration parameter storage in embedded microcontroller systems
• Calibration data retention in low-power electronic devices

Memory IC Procurement Notes

Verify that the ordering suffix 'I' confirms the industrial temperature range (-40°C to +85°C) and 'ST' specifies the TSSOP-8 package. Confirm the voltage range matches application requirements as this part is limited to 3.0V maximum. Ensure compatibility with the host controller's SPI mode and voltage levels before integration.

Memory IC Selection Notes

Select this component when non-volatile storage is required with sector-level erase capabilities typically found in flash memory but with EEPROM endurance characteristics. It is suitable for applications needing frequent updates to small data blocks. Verify that the system voltage does not exceed 3.0V, as higher voltages require different device variants.

Memory IC Part Context

This part belongs to the 25A512 family of serial EEPROMs from Microchip Technology. It shares functional similarities with other SPI EEPROMs but is distinguished by its specific 512 Kbit capacity and integrated sector erase functionality. The 'T' indicates tape and reel packaging, while 'I/ST' defines the temperature grade and physical package type.

Memory IC Replacement Considerations

Direct substitutes include other 512 Kbit SPI EEPROMs with similar voltage ranges and package types. Verify pinout compatibility and instruction set alignment if replacing with parts from different manufacturers. Check datasheets for equivalent endurance ratings and operating temperature specifications.