23K256-E/ST

Memory IC Overview

The Microchip Technology 23K256-E/ST is a 256 Kbit Serial SRAM device organized as 32,768 x 8 bits. It operates within a supply voltage range of 2.7 V to 3.6 V and supports a maximum clock frequency of 20 MHz. The component utilizes a Serial Peripheral Interface (SPI) compatible bus for data access. It features low-power CMOS technology with a standby current of 4 µA maximum at +85°C. The device is housed in an 8-lead TSSOP package and is rated for an extended operating temperature range from -40°C to +125°C.

Memory IC Feature Summary

• Supports flexible operating modes including byte read/write, page mode with 32-byte pages, and sequential mode for continuous array access.
• Includes a dedicated HOLD pin that allows suspension of serial communication without resetting the sequence, facilitating host interrupt servicing.
• Provides high reliability with ESD protection on all pins and data retention capabilities down to 1.2 V.

Memory IC Applications

• Data logging systems requiring non-volatile-like temporary storage via SPI interfaces
• Microcontroller-based embedded systems needing fast random access memory
• Industrial control applications operating in extended temperature environments

Memory IC Procurement Notes

Verify the specific suffix 'E' confirms the automotive temperature grade (-40°C to +125°C) and the 'ST' indicates the 8-lead TSSOP package. Confirm RoHS compliance and lead-free status through official manufacturer documentation or authorized distributor datasheets prior to integration.

Memory IC Selection Notes

Select this part when an SPI-compatible SRAM is required for applications demanding operation up to 125°C ambient temperature. Ensure the system voltage aligns with the 2.7 V to 3.6 V range. Consider the 32-byte page size if optimizing for burst write operations within page boundaries.

Memory IC Part Context

This component belongs to the 23X256 family of 256 Kbit Serial SRAMs manufactured by Microchip Technology. The family includes variants such as the 23A256, which supports lower voltage ranges. The 23K256 series is designed for direct interface with popular microcontroller families supporting standard SPI protocols.

Memory IC Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Verify compatibility with alternative SPI SRAM devices based on pinout, voltage, and timing specifications.