23A512T-I/ST

Memory IC Overview

The Microchip Technology 23A512T-I/ST is a 512-Kbit Serial SRAM device featuring SPI, SDI, and SQI interfaces. 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 64K x 8 bits with a 32-byte page structure. Key electrical characteristics include a read current of 3 mA at 5.5V equivalent load and standby current of 4 µA. It utilizes an 8-lead TSSOP package.

Memory IC Feature Summary

• Supports high-speed data transfer via Serial Dual Interface (SDI) and Serial Quad Interface (SQI) modes alongside standard SPI.
• Provides unlimited read and write cycles with zero write time for immediate data availability.
• Includes a Hold function to suspend serial communication sequences without resetting the internal address pointer.
• Operates on low-power CMOS technology suitable for battery-powered or energy-efficient applications.

Memory IC Applications

• Data logging systems requiring frequent small data updates
• Microcontroller cache memory expansion
• Real-time buffer storage in embedded control systems

Memory IC Procurement Notes

Verify that the operating voltage supply matches the 1.7V–2.2V specification for the 23A512 variant, as it differs from the 23LC512 series. Confirm the Industrial temperature grade (-40°C to +85°C) meets environmental requirements. Ensure the host controller supports the required SPI/SDI/SQI protocol commands for proper initialization and mode switching.

Memory IC Selection Notes

Select this component when low-voltage operation between 1.7V and 2.2V is required. Choose the 23A512 over the 23LC512 if the system power rail does not support 2.5V minimum. Consider the TSSOP package for surface-mount assembly constraints. Verify interface compatibility for SDI/SQI modes if higher throughput than standard SPI is needed.

Memory IC Part Context

This part belongs to the 23A512/23LC512 family of 512-Kbit Serial SRAMs. It shares functional similarities with the 23LC512 but is distinguished by its lower voltage operating range (1.7V–2.2V vs. 2.5V–5.5V). Both variants offer identical memory architecture and interface capabilities, differing primarily in power supply specifications and thermal performance limits.

Memory IC Replacement Considerations

The 23LC512T-I/ST is a pin-compatible alternative but requires a 2.5V–5.5V supply. Direct substitution is only valid if the system voltage supports the higher range. No other direct substitutes are confirmed in the provided documentation.