93AA56AT-I/OT

Memory IC Overview

The Microchip Technology 93AA56AT-I/OT is a 2Kbit low-voltage serial Electrically Erasable PROM (EEPROM) utilizing Microwire-compatible 3-wire serial I/O. It features an industrial temperature range of -40°C to +85°C and operates within a supply voltage range of 1.8V to 5.5V. The device employs advanced CMOS technology for low-power consumption, offering 1,000,000 erase/write cycles and data retention exceeding 200 years. It includes power-on/off data protection and supports sequential read functions.

Memory IC Feature Summary

• Microwire compatible 3-wire serial interface with dedicated clock, data input, and data output pins
• Self-timed erase and write cycles with automatic ready/busy status signaling on the data output pin
• Power-on/off data protection circuitry prevents accidental programming during voltage transitions
• Erase/write enable/disable commands provide additional security against unintended memory alterations

Memory IC Applications

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

Memory IC Procurement Notes

Verify the specific suffix 'I/OT' corresponds to the Industrial temperature grade (-40°C to +85°C) and SOT-23 package configuration. Confirm that the 'A' variant designation indicates fixed 8-bit word organization without an external ORG pin selection capability. Ensure compatibility with the host controller's Microwire protocol timing requirements before finalizing procurement.

Memory IC Selection Notes

Select this component when a compact SOT-23 footprint is required for space-constrained designs. The 1.8V minimum operating voltage makes it suitable for battery-powered applications where lower supply rails are utilized. The fixed 8-bit organization simplifies software drivers compared to word-selectable variants, reducing code complexity for standard byte-oriented data logging tasks.

Memory IC Part Context

This device belongs to the 93XX56 series of 2Kbit EEPROMs from Microchip Technology. The series encompasses various voltage grades and package options, including PDIP, SOIC, MSOP, TSSOP, DFN, and SOT-23. The 'A' suffix denotes 8-bit organization, while 'B' denotes 16-bit. The 'T' indicates tape and reel packaging, and 'OT' specifies the SOT-23 package with Industrial temperature rating.

Memory IC Replacement Considerations

Direct substitutes include other 93AA56 variants with different packages such as 93AA56A-I/SN or 93AA56A-I/MS, provided the physical footprint allows for redesign. Cross-reference with 93LC56AT-I/OT if the application requires a higher minimum supply voltage of 2.5V instead of 1.8V.