23A512-I/SN

Memory IC Overview

The Microchip Technology 23A512-I/SN is a 512-Kbit Serial SRAM device featuring an SPI-compatible bus interface with support for SDI and SQI modes. It operates within a supply voltage range of 1.7V to 2.2V and supports clock rates up to 20 MHz in Industrial temperature conditions (-40°C to +85°C). The memory is organized as 64K x 8-bit with 32-byte pages, offering Byte, Page, and Sequential access modes. Key electrical characteristics include a typical read current of 3 mA at 20 MHz and a standby current of 4 µA.

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 applications.

Memory IC Applications

• Data logging systems requiring non-volatile-like retention during power loss
• Microcontroller-based embedded systems needing fast temporary storage
• Industrial control devices operating in wide temperature ranges

Memory IC Procurement Notes

Verify that the supply voltage provided to the VCC pin strictly remains within the 1.7V to 2.2V range specified for the 23A512 variant. Ensure the operating environment stays within the Industrial temperature grade limits of -40°C to +85°C. Confirm that the host microcontroller supports the required SPI timing parameters or can be configured to meet the setup and hold times defined in the datasheet.

Memory IC Selection Notes

Select this component when a small, fast volatile memory buffer is needed for SPI-connected microcontrollers. The 23A512 is distinct from the 23LC512 due to its lower voltage operation (1.7V-2.2V vs 2.5V-5.5V). Choose this part if the application requires dual or quad I/O speeds but cannot support the higher voltage requirements of other SRAM families. Verify package availability matches the PCB layout constraints for the 8-lead SOIC option.

Memory IC Part Context

This device belongs to the 23A512/23LC512 family of 512-Kbit Serial SRAMs manufactured by Microchip Technology. It is designed to interface directly with popular microcontroller families, including PIC® devices, providing a simple serial interface solution for expanding system memory capabilities without consuming multiple parallel GPIO pins.

Memory IC Replacement Considerations

The 23LC512 is a pin-compatible alternative within the same family but operates at a higher voltage range (2.5V-5.5V). Ensure any replacement matches the specific voltage and temperature grade requirements of the original design.

Memory IC FAQ

How does the HOLD pin function affect serial communication?

The HOLD pin allows the user to pause serial communication mid-sequence without resetting the address pointer. It must be held low while SCK is low to invoke the pause, and brought high while SCK is low to resume.

What is the difference between Byte, Page, and Sequential modes?

Byte mode accesses a single byte per command. Page mode allows accessing up to 32 bytes within the same page boundary. Sequential mode automatically increments the address across page boundaries, allowing continuous access to the entire memory array.