23K256T-E/ST

Memory IC Overview

The Microchip Technology 23K256T-E/ST is a 256 Kbit Serial SRAM device with a 32,768 x 8-bit organization. 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 an SPI-compatible serial bus for data access and features low-power CMOS technology. It is housed in an 8-lead TSSOP package and is designed for industrial and automotive temperature ranges, specifically -40°C to +125°C.

Memory IC Feature Summary

• Supports flexible operating modes including byte read/write, page mode for 32-byte pages, and sequential mode for continuous array access.
• Includes a 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 a specified voltage limit.

Memory IC Applications

• Data logging systems requiring non-volatile-like temporary storage via external backup
• Microcontroller-based embedded systems needing fast random access memory
• Automotive electronic control units operating under extended temperature conditions

Memory IC Procurement Notes

Verify the specific suffix 'E' confirms the automotive temperature grade (-40°C to +125°C) and the 'T' indicates tape and reel packaging. Confirm the 'ST' designation matches the required 8-lead TSSOP physical footprint. Ensure the source documentation explicitly lists this exact part number variant to avoid confusion with industrial grade or different package types.

Memory IC Selection Notes

Select this component when an SPI interface is preferred over parallel buses to minimize pin count. Choose the 23K256T-E/ST specifically for applications requiring operation up to 125°C ambient temperature. The 256 Kbit capacity suits moderate data buffering needs where power consumption during standby must be minimized.

Memory IC Part Context

This device belongs to the 23X256 family of Serial SRAMs from Microchip Technology. It shares functional similarities with the 23A256 but differs in supply voltage requirements and temperature ratings. The family is designed to interface directly with popular microcontroller families, including PIC microcontrollers, offering a drop-in replacement for standard SPI memory interfaces.

Memory IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing PCB footprints and firmware drivers if considering alternative manufacturers or pin-compatible devices from other vendors.