23K640-I/P

Memory IC Overview

The Microchip Technology 23K640-I/P is a 64 Kbit Serial SRAM device organized as 8192 words by 8 bits. It interfaces via a standard SPI-compatible serial bus requiring SCK, SI, and SO lines, controlled by the CS input. The supply voltage range is 2.7 V to 3.6 V. Maximum clock frequency reaches 20 MHz with a typical access time of 32 ns at this speed. Operating current is 3 mA at 1 MHz and 10 mA at 20 MHz. Standby current is 4 µA maximum at +85°C. The Industrial temperature range spans -40°C to +85°C. It features a 32-byte page size and includes a HOLD pin for pausing transmission.

Memory IC Feature Summary

• Supports flexible operating modes including Byte, Page (32-byte), and Sequential read/write operations.
• Includes a dedicated HOLD pin that suspends serial communication without resetting the sequence, allowing host interruption handling.
• Low-power CMOS technology ensures minimal standby current consumption while maintaining high-speed data transfer capabilities.
• Compatible with standard SPI protocols, enabling direct interface with microcontrollers lacking built-in hardware SPI ports.

Memory IC Applications

• Data logging in industrial monitoring systems
• Configuration storage for embedded controllers
• Temporary buffer memory in sensor networks
• Non-volatile state retention in battery-backed circuits

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the Industrial temperature range (-40°C to +85°C) and 'P' denotes the PDIP package. Confirm RoHS compliance status through official manufacturer documentation. Ensure voltage requirements match system design constraints. Check for automotive variants if higher temperature ratings are needed.

Memory IC Selection Notes

Select this component when SPI-based volatile memory with low power consumption is required. Consider the 23K640-E variant for extended temperature applications up to +125°C. Evaluate the 23A640 series if lower voltage operation near 1.8V is necessary. Ensure PCB layout supports the 8-lead PDIP footprint and SPI signal integrity.

Memory IC Part Context

This part belongs to the 23X640 family of 64 Kbit Serial SRAMs from Microchip Technology. The family includes variants like 23K640, 23A640, and 23K256. These devices share similar functional architectures but differ in voltage ranges, capacities, and temperature specifications. The 23K640 specifically targets general-purpose industrial applications requiring reliable serial data storage.

Memory IC Replacement Considerations

Direct substitutes within the same family include the 23K640-E/P for extended temperature ranges. Cross-family replacements may require verification of voltage compatibility and pinout alignment. Always consult official datasheets to confirm functional equivalence before substitution.