25AA080A-I/ST

Memory IC Overview

The Microchip Technology 25AA080A-I/ST is an 8 Kbit (1024 x 8-bit) Serial Electrically Erasable PROM. It utilizes a standard SPI-compatible interface with a maximum clock frequency of 10 MHz. The device supports a supply voltage range of 1.8 V to 5.5 V and features a 16-byte page size. It operates within an industrial temperature range of -40 °C to +85 °C and is housed in an 8-lead TSSOP package.

Memory IC Feature Summary

• Supports serial communication via a four-wire SPI bus including Chip Select, Serial Clock, Serial Data Input, and Serial Data Output lines.
• Includes programmable block write protection allowing selection of none, one-quarter, one-half, or all memory array segments.
• Features hardware data protection through power-on/off circuitry, a write enable latch, and a dedicated write-protect pin.

Memory IC Applications

• Data storage for configuration parameters in microcontroller systems
• Logging operational history or event records
• Storing calibration constants and device identifiers

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature rating (-40 °C to +85 °C). Confirm the 'ST' designation matches the required 8-lead TSSOP surface-mount package. Ensure the 'A' variant is selected for the specified 16-byte page size rather than the 32-byte 'B' version. Cross-reference the datasheet revision to confirm electrical characteristics remain consistent with current production batches.

Memory IC Selection Notes

Select this component when low-voltage operation starting at 1.8 V is required alongside standard SPI compatibility. Choose the 25AA080A over the 25LC080A if the system design mandates a lower minimum operating voltage. Opt for the TSSOP package when board space constraints necessitate a compact surface-mount footprint compared to PDIP alternatives.

Memory IC Part Context

This part belongs to the 25XX080A/B family of 8 Kbit EEPROMs from Microchip Technology. It shares functional similarities with the 25LC080A but differs in its wider supply voltage range extending down to 1.8 V. The family provides nonvolatile memory solutions for embedded applications requiring reliable data retention and high endurance cycles.

Memory IC Replacement Considerations

The 25AA080A-I/MS serves as a direct package alternative using the MSOP form factor. For systems requiring a 2.5 V minimum supply, the 25LC080A-I/ST offers equivalent functionality. Verify that any substitute maintains the same 16-byte page architecture and SPI timing requirements.