23K256-I/SN

Memory IC Overview

The Microchip Technology 23K256-I/SN is a 256 Kbit Serial SRAM device housed in an 8-lead SOIC package. It operates within a supply voltage range of 2.7V to 3.6V and supports industrial temperature conditions from -40°C to +85°C. The memory organization is 32,768 x 8 bits, accessed via a standard SPI compatible serial bus with a maximum clock frequency of 20 MHz. Key electrical characteristics include a read current of 3 mA at 1 MHz and a standby current of 4 µA maximum at +85°C.

Memory IC Feature Summary

• Supports flexible operating modes including byte, page, and sequential access for efficient data management.
• Features a HOLD pin that allows suspension of communication to service higher priority interrupts without resetting the sequence.
• Utilizes low-power CMOS technology to minimize energy consumption during active and standby states.

Memory IC Applications

• Direct interface with microcontrollers lacking built-in SPI ports using discrete I/O lines.
• Data logging applications requiring non-volatile-like temporary storage with high-speed access.
• Embedded systems needing additional RAM for buffer operations or variable storage.

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature range (-40°C to +85°C) and 'SN' denotes the 8-lead SOIC package. Confirm RoHS compliance and lead-free status as per the manufacturer's environmental declarations. Ensure the design accounts for the required CS setup and hold times specified in the AC characteristics table for reliable SPI communication.

Memory IC Selection Notes

Select this component when a 256 Kbit volatile memory solution is required with SPI compatibility. The 23K256 variant is chosen over the 23A256 for applications requiring a 2.7V to 3.6V supply voltage rather than the lower 1.5V to 1.95V range. Consider the SOIC package for through-hole or standard surface mount assembly needs within the industrial temperature grade.

Memory IC Part Context

This part belongs to the 23X256 family of 256-Kbit Serial SRAM devices from Microchip Technology. The family includes variants like 23K256 and 23A256, differentiated primarily by supply voltage ranges and temperature grades. These devices are designed to provide simple, low-pin-count memory expansion for embedded systems using standard serial interfaces.

Memory IC Replacement Considerations

Public confirmed substitute part numbers: None identified in source material.