23AA02M-I/ST

Memory IC Overview

The Microchip Technology 23AA02M-I/ST is a 2-Mbit (256 k x 8-bit) low-power serial static random-access memory device. It operates within a supply voltage range of 1.7V to 3.6V and supports industrial temperature ranges from -40°C to +85°C. The component utilizes an SPI-compatible interface architecture, supporting Serial Peripheral Interface (SPI), Serial Dual Interface (SDI), and Serial Quad Interface (SQI) modes with a maximum clock frequency of 143 MHz. It features built-in Error Correction Code (ECC) logic for superior reliability and offers user-selectable page sizes of 32 or 256 bytes.

Memory IC Feature Summary

• Supports high-speed data transfer through SPI, SDI, and SQI interface modes with up to 143 MHz clock frequency
• Includes built-in Error Correction Code (ECC) logic to ensure data integrity and operational reliability
• Provides unlimited read and write cycles with zero write time for efficient memory operations
• Features configurable output drive strength and slew rate settings via the STATUS register

Memory IC Applications

• Data logging systems requiring persistent temporary storage
• Industrial control applications needing reliable non-volatile-like SRAM performance
• Embedded systems utilizing SPI-compatible microcontrollers for high-speed data buffering
• Battery-powered devices where low standby current consumption is critical

Memory IC Procurement Notes

Verify that the ordering suffix 'ST' corresponds to the 8-lead TSSOP package, as this specific variant is restricted to 8-pin packages unlike the 14-pin 23LCV02M. Confirm the industrial temperature grade (-40°C to +85°C) matches your environmental requirements. Ensure the design accommodates the 1.7V minimum operating voltage for the 23AA02M series. Check RoHS compliance documentation if halogen-free status is required for your manufacturing process.

Memory IC Selection Notes

Select the 23AA02M-I/ST when a lower minimum operating voltage of 1.7V is required compared to the 2.2V minimum of the 23LCV02M. This part lacks the VBAT pin, making it suitable for designs that do not require external battery backup functionality. Choose this component over EEPROM alternatives when infinite endurance and faster write speeds are prioritized over data retention without power. Ensure the host controller supports the desired interface mode (SPI, SDI, or SQI) to leverage the full performance capabilities.

Memory IC Part Context

This component belongs to the 23XX02M family of 2-Mbit serial SRAM devices manufactured by Microchip Technology. It shares architectural similarities with the 23LCV02M but differs in voltage specifications and package availability. The 23AA02M is exclusively available in 8-lead packages, whereas the 23LCV02M is limited to 14-lead packages. Both variants support identical interface protocols and ECC features, differing primarily in power supply thresholds and backup capabilities.

Memory IC Replacement Considerations

The 23LCV02M-I/ST serves as a functional substitute if the application requires battery backup support and can accommodate a higher minimum voltage of 2.2V. Verify that the replacement part's 14-lead package fits the existing PCB footprint or allows for redesign. Ensure the system voltage rail remains above 2.2V to guarantee proper operation of the replacement device.