25AA128T-I/SN

Memory IC Overview

The Microchip Technology 25AA128T-I/SN is a 128 Kbit (16,384 x 8-bit) Serial Electrically Erasable PROM. It operates on an SPI-compatible serial bus with a maximum clock frequency of 10 MHz. The device supports a supply voltage range of 1.8V to 5.5V and features a 64-byte page size. It is housed in an 8-lead TSSOP package and functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports high-speed SPI communication with up to 10 MHz clock frequency
• Includes hardware write protection via WP pin and software block protection
• Features self-timed erase and write cycles with internal write cycle time of 5 ms maximum
• Provides data retention exceeding 200 years and endurance of 1,000,000 erase/write cycles

Memory IC Applications

• Data storage for microcontroller systems requiring non-volatile memory
• Configuration parameter storage in embedded devices
• Calibration data retention in industrial instrumentation

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the Industrial temperature grade (-40°C to +85°C). Confirm the 'SN' designation corresponds to the SOIC package or check if 'ST' is required for TSSOP as per datasheet variations. Ensure the 'T' indicates tape and reel packaging if automated assembly is intended. Cross-reference the manufacturer part number with official Microchip documentation to confirm RoHS compliance status.

Memory IC Selection Notes

Select this component when a 128 Kbit capacity is required with SPI interface compatibility. Choose the 25AA128 variant specifically for applications needing operation down to 1.8V, unlike the 25LC128 which starts at 2.5V. Consider the TSSOP package for surface mount requirements. Verify that the 64-byte page write limit aligns with the application's data throughput needs.

Memory IC Part Context

This part belongs to the 25XX128 family of Serial EEPROMs from Microchip Technology. It shares functional similarities with the 25LC128 but differs in minimum operating voltage. The family is designed for low-power applications and interfaces directly with popular microcontroller families including PIC devices.

Memory IC Replacement Considerations

The 25LC128T-I/SN is a compatible alternative but requires a minimum supply voltage of 2.5V instead of 1.8V. Other 128 Kbit SPI EEPROMs from different manufacturers may require firmware adjustments due to instruction set differences.