23A512T-E/ST

Memory IC Overview

The Microchip Technology 23A512T-E/ST is a 512-Kbit Serial Static Random Access Memory (SRAM) device. It features a SPI-compatible bus interface supporting standard, Dual I/O (SDI), and Quad I/O (SQI) modes with a maximum clock frequency of 20 MHz. The memory organization is 64K x 8 bits. The device operates within a supply voltage range of 1.7V to 2.2V and supports an extended industrial temperature range from -40°C to +125°C. It is housed in an 8-lead Thin Shrink Small Outline package (TSSOP).

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 with minimal standby current consumption.

Memory IC Applications

• Data logging and storage in battery-powered embedded systems requiring low standby current.
• High-speed buffer memory for microcontrollers utilizing SDI or SQI interfaces.
• Industrial control applications operating within extended temperature environments.

Memory IC Procurement Notes

Verify that the specific ordering suffix 'E' corresponds to the Extended Temperature grade (-40°C to +125°C) and the 'T' indicates tape-and-reel packaging. Confirm the voltage range requirement aligns with the 1.7V to 2.2V specification, as this variant differs from the 2.5V-5.5V versions. Ensure the host system supports the required SPI protocol commands for mode selection.

Memory IC Selection Notes

Select this component when an application requires non-volatile-like speed with volatile SRAM characteristics but needs operation at lower supply voltages than standard 5V devices. The Extended temperature rating makes it suitable for harsh environments. Consider the TSSOP package if space constraints require a smaller footprint compared to SOIC or PDIP options.

Memory IC Part Context

This part belongs to the 23A512/23LC512 family of 512-Kbit Serial SRAMs. The '23A' designation specifically denotes the 1.7V-2.2V voltage range, distinguishing it from the '23LC' series which supports 2.5V-5.5V. Both series share identical pinouts and functional interfaces, allowing for potential design flexibility based on available supply rails.

Memory IC Replacement Considerations

The 23LC512T-E/ST serves as a direct functional substitute if the system power supply allows for the higher 2.5V-5.5V operating range. Other packages such as SN (SOIC) or P (PDIP) are available for the same electrical specifications if a different form factor is required.