23A512-E/ST

Memory IC Overview

The Microchip Technology 23A512-E/ST is a 512-Kbit Serial Static Random Access Memory (SRAM) device. It features an SPI-compatible bus interface supporting standard SPI, Serial Dual Interface (SDI), and Serial Quad Interface (SQI) modes for flexible data throughput. The memory array is organized as 64K x 8 bits with a 32-byte page structure. The device operates within a supply voltage range of 1.7V to 2.2V and supports Industrial (-40°C to +85°C) and Extended (-40°C to +125°C) temperature ranges. It utilizes low-power CMOS technology and offers unlimited read/write cycles with zero write time.

Memory IC Feature Summary

• Supports SPI, SDI, and SQI interface modes for variable data transfer speeds
• Provides unlimited read and write cycles with no write delay
• Includes Hold function to suspend serial communication without resetting the sequence
• Operates on a single power supply with low standby current consumption

Memory IC Applications

• Data acquisition systems requiring non-volatile-like temporary storage
• Embedded microcontroller applications needing fast random access memory
• Industrial control systems operating in extended temperature environments
• Portable devices utilizing low-voltage power supplies

Memory IC Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature grade. The 'E' suffix indicates Extended temperature range capability, while 'ST' denotes the SOIC-8 package. Confirm that the system voltage remains within the 1.7V to 2.2V operational limits defined for the 23A512 variant. Ensure compatibility with the host controller's SPI or SDI/SQI signaling requirements before finalizing procurement.

Memory IC Selection Notes

Select this component when an application requires high-speed serial SRAM with dual or quad I/O capabilities. The 23A512 is suitable for designs needing unlimited endurance compared to EEPROM alternatives. Choose the Extended temperature version if the environment exceeds standard industrial limits. Ensure the host processor supports the necessary clock frequencies and interface modes for optimal performance.

Memory IC Part Context

This part belongs to the 23A512/23LC512 family of 512-Kbit Serial SRAMs manufactured by Microchip Technology. The family differentiates primarily by operating voltage ranges, with the 23A512 supporting lower voltages (1.7V-2.2V) compared to the 23LC512 (2.5V-5.5V). Both share identical pinouts, instruction sets, and interface protocols, allowing for potential design flexibility based on power supply constraints.

Memory IC Replacement Considerations

The 23LC512 series serves as a voltage-compatible alternative if the system operates at 2.5V or higher. Verify that any substitute maintains the same SOIC-8 package dimensions and pin configuration. Ensure the replacement supports the required Industrial or Extended temperature ratings and interface modes (SPI/SDI/SQI) specified in the design.