23K640T-E/SN

Memory IC Overview

The Microchip Technology 23K640T-E/SN is a 64-Kbit (8192 x 8-bit) low-power CMOS Serial SRAM. It interfaces via an SPI-compatible serial bus with SCK, SI, SO, and CS pins. The device supports a maximum clock frequency of 20 MHz at VCC = 3.0V. Operating voltage ranges from 2.7V to 3.6V. It features a 32-byte page size and includes a HOLD pin for pausing communication. The component meets automotive standards with an extended temperature range of -40°C to +125°C.

Memory IC Feature Summary

• Supports flexible operating modes including byte read/write, 32-byte page mode, and sequential mode.
• Includes a dedicated HOLD input pin to suspend serial transmission without resetting the sequence.
• Provides high reliability with ESD protection on all pins.

Memory IC Applications

• Data logging in industrial control systems
• Configuration storage for microcontroller peripherals
• Non-volatile data backup in automotive electronics

Memory IC Procurement Notes

Verify that the specific suffix 'E' confirms the automotive temperature grade (-40°C to +125°C) and the 'SN' indicates the SOIC-8 package. Confirm the 'T' suffix matches the required reel packaging format. Ensure the supply voltage requirements align with the 2.7V to 3.6V specification before integration.

Memory IC Selection Notes

Select this part when an SPI interface is required for small-scale volatile memory retention. The automotive grade ensures stability in high-temperature environments. Compare against the 23A640 series if a lower 1.7V to 1.95V supply voltage is necessary for the application design.

Memory IC Part Context

This component belongs to the 23X640 family of 64-Kbit Serial SRAM devices manufactured by Microchip Technology. The family shares identical functional architectures and instruction sets, differing primarily in supply voltage ranges and temperature ratings between the 23A640 and 23K640 variants.

Memory IC Replacement Considerations

Public confirmed substitutes include other 23K640 variants with different packages or temperatures, such as 23K640-I/SN or 23K640-E/ST, provided the electrical characteristics remain compatible.