23K256T-I/SN

Memory IC Overview

The Microchip Technology 23K256T-I/SN is a 256-Kbit Serial SRAM device accessed via a SPI-compatible serial bus. It features a 32,768 x 8-bit organization with a 32-byte page size. The component operates within a supply voltage range of 2.7V to 3.6V and supports clock frequencies up to 20 MHz. It utilizes low-power CMOS technology, offering standby current as low as 4 µA at +85°C. The device is housed in an 8-lead SOIC package and supports industrial temperature ranges from -40°C to +85°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 higher priority interrupt servicing.
• Features high reliability with ESD protection on all pins and RoHS compliance.

Memory IC Applications

• Direct interface with microcontrollers possessing built-in SPI ports, such as PIC families.
• Systems requiring non-volatile data storage emulation using discrete I/O lines programmed to match SPI protocol.
• Applications necessitating pauseable serial communication for handling critical interrupts.

Memory IC Procurement Notes

Verify the specific suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'SN' denotes the 8-lead SOIC package. Confirm the 'T' indicates tape and reel packaging if required by assembly equipment. Ensure the voltage rating aligns with the 2.7V to 3.6V specification for the 23K256 variant, distinct from the lower voltage 23A256 series.

Memory IC Selection Notes

Select this component when SPI interface compatibility is required for fast random access memory needs. Choose the 23K256 over the 23A256 if the system operates above 1.95V, as the latter is limited to 1.5V–1.95V. Consider the SOIC package for standard surface mount applications. Verify that the 20 MHz maximum clock speed meets the system's timing requirements.

Memory IC Part Context

This part belongs to the 23X256 family of 256-Kbit Serial SRAM devices. It shares functional similarities with the 23A256 but differs in supply voltage requirements. The family is designed for low-power applications and offers various package options including PDIP, SOIC, and TSSOP. The 23K256 specifically targets industrial environments with broader voltage tolerance compared to automotive or low-voltage variants.

Memory IC Replacement Considerations

The 23K256T-E/ST serves as an alternative with Automotive temperature qualification (-40°C to +125°C) and TSSOP packaging. The 23A256 series is compatible functionally but requires a lower supply voltage (1.5V–1.95V). Ensure voltage levels and thermal specifications match the target application before substitution.