93AA76A-I/ST

Memory IC Overview

The Microchip Technology 93AA76A-I/ST is an 8Kbit serial Electrically Erasable PROM (EEPROM) utilizing low-power CMOS technology. It features a fixed 1024 x 8-bit memory organization and operates within a voltage range of 1.8V to 5.5V. The device supports a maximum clock frequency of 3 MHz at voltages between 4.5V and 5.5V, with reduced speeds at lower voltages. It employs a standard 3-Wire Microwire serial interface and is housed in an 8-lead TSSOP package. The component is rated for industrial temperatures from -40°C to +85°C.

Memory IC Feature Summary

• Fixed 8-bit word organization without external configuration pins
• Self-timed erase and write cycles with automatic ready/busy status polling
• Power-on/off data protection circuitry to prevent corruption during power transitions
• Hardware write protection via Erase/Write Enable and Disable commands

Memory IC Applications

• Low-power nonvolatile data storage in embedded systems
• Configuration parameter retention in industrial control devices
• Calibration data storage for sensor modules
• Device identification and serial number storage

Memory IC Procurement Notes

Verify the specific suffix 'I/ST' corresponds to the Industrial temperature grade (-40°C to +85°C) and the 8-lead TSSOP surface-mount package. Confirm that the 'A' designation indicates the fixed 8-bit organization, distinguishing it from the ORG-pin selectable 'C' version. Ensure compatibility with the required supply voltage range of 1.8V to 5.5V for the target application design.

Memory IC Selection Notes

Select this part when a fixed 8-bit memory width is required without the complexity of an ORG pin. It is suitable for applications needing robust data retention exceeding 200 years and high endurance up to 1,000,000 erase/write cycles. Choose this over the 'B' variant if 16-bit words are not needed, or over the 'C' variant if hardware write protection via the PE pin is unnecessary.

Memory IC Part Context

This component belongs to the 93XX76 family of 8Kbit EEPROMs, which includes variants with different memory organizations ('A' for 8-bit, 'B' for 16-bit, and 'C' for selectable). The 'AA' prefix denotes operation down to 1.8V, unlike 'LC' or 'C' prefixes which have higher minimum voltage requirements. The 'I' suffix specifies the industrial temperature range, while 'ST' identifies the TSSOP package type.

Memory IC Replacement Considerations

Direct functional substitutes within the same family include the 93AA76B-I/ST (16-bit organization) and the 93AA76C-I/ST (selectable organization). Note that these alternatives have different pin functions or logic requirements compared to the fixed 8-bit architecture of the 93AA76A.