24AA256T-E/SM

Memory IC Overview

The Microchip Technology 24AA256T-E/SM is a 32K x 8 (256 Kbit) Serial Electrically Erasable PROM (EEPROM). It operates across a broad voltage range of 1.7V to 5.5V and supports maximum clock frequencies of 100 kHz for voltages below 2.5V, and 400 kHz for voltages between 2.5V and 5.5V. The device features an extended temperature range from -40°C to +125°C and utilizes a two-wire I2C compatible serial interface.

Memory IC Feature Summary

• Low-power CMOS technology with typical standby current of 1 µA maximum
• Hardware write-protect capability via the WP pin
• Schmitt trigger inputs for enhanced noise suppression
• Output slope control designed to eliminate ground bounce

Memory IC Applications

• Personal communications devices
• Data acquisition systems
• Advanced low-power applications

Memory IC Procurement Notes

Verify that the ordering suffix 'E' confirms the extended temperature range (-40°C to +125°C) and 'SM' specifies the 8-lead MSOP package. Confirm the 'T' suffix indicates tape and reel packaging. Ensure the component matches the specific 24AA256 series electrical characteristics rather than the 24LC or 24FC variants.

Memory IC Selection Notes

Select this part when operation down to 1.7V is required, as opposed to the 2.5V minimum of the 24LC256 variant. Choose the MSOP package for surface mount space constraints. Verify that the 400 kHz maximum clock frequency meets system timing requirements at the operating voltage.

Memory IC Part Context

This component belongs to the 24XX256 family of 256-Kbit Serial EEPROMs manufactured by Microchip Technology. The family includes the 24AA256, 24LC256, and 24FC256 variants, which share similar interfaces but differ in voltage ranges and clock speeds.

Memory IC Replacement Considerations

24AA256-E/SM

Memory IC FAQ

How does the WP pin function?

The Write-Protect (WP) pin inhibits write operations when tied to VCC, while read operations remain unaffected. Tying it to VSS enables write operations.

What is the page write buffer size?

The device supports a page write buffer capable of storing up to 64 bytes of data before initiating an internal self-timed write cycle.