23A1024-I/SN

Memory IC Overview

The Microchip Technology 23A1024-I/SN is a 1 Mbit Serial SRAM device featuring an SPI-compatible interface with support for SDI and SQI modes. It operates within a supply voltage range of 1.7V to 2.2V and supports clock frequencies up to 20 MHz in industrial temperature conditions (-40°C to +85°C). The memory organization is 128K x 8-bit with 32-byte pages, offering unlimited read/write cycles and zero write time.

Memory IC Feature Summary

• Supports SPI, SDI, and SQI bus interfaces for flexible data transfer rates
• Provides unlimited read and write cycles with zero write time latency
• Operates on low-power CMOS technology with standby current as low as 4 µA
• Available in 8-lead SOIC, TSSOP, and PDIP packages

Memory IC Applications

• Data logging applications requiring non-volatile-like persistence during power loss
• Embedded systems using microcontrollers with built-in SPI ports
• Industrial control systems operating in extended temperature ranges
• Automotive electronics requiring high reliability and wide voltage tolerance

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the Industrial temperature grade (-40°C to +85°C) and 'SN' denotes the 8-lead SOIC package. Confirm the part number corresponds to the 23A1024 variant, which specifies the 1.7V to 2.2V supply voltage range, distinct from the 23LC1024 series. Ensure documentation matches DS20005142C for accurate electrical characteristics.

Memory IC Selection Notes

Select this component when a 1 Mbit serial RAM solution is required with dual or quad I/O capabilities for increased throughput. It is suitable for designs needing unlimited endurance without wear-leveling algorithms. Consider the 1.7V-2.2V operating range if the system voltage is lower than standard 3.3V or 5V logic levels. Verify that the host controller supports the required SPI modes or can implement them via firmware.

Memory IC Part Context

This device belongs to the 23A1024/23LC1024 family of 1 Mbit Serial SRAMs. The 23A1024 variant is specifically designed for lower voltage applications (1.7V-2.2V), whereas the 23LC1024 supports 2.5V-5.5V. Both share identical pinouts and functional behaviors, differing primarily in supply voltage specifications and temperature grades.

Memory IC Replacement Considerations

The 23LC1024 is functionally similar but requires a higher supply voltage (2.5V-5.5V). Direct substitution is only valid if the system voltage falls within the 2.5V-5.5V range. Other Microchip serial SRAMs may require pinout or command set verification.