24AA128T-I/SM

Memory IC Overview

The Microchip Technology 24AA128T-I/SM is a 16K x 8 (128 Kbit) Serial Electrically Erasable PROM (EEPROM). It operates on a single supply voltage ranging from 1.7V to 5.5V and supports I2C compatible two-wire serial interface communication with a maximum clock frequency of 400 kHz. The device features a 64-byte page write buffer, hardware write-protect capability, and Schmitt trigger inputs for noise suppression. It is housed in an 8-lead SOIJ package and is rated for industrial temperature operation between -40°C and +85°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using configurable chip address inputs.
• Includes hardware write-protect functionality controlled by the WP pin to inhibit array writes.
• Features output slope control designed to eliminate ground bounce during operation.

Memory IC Applications

• Personal communications systems
• Data acquisition applications
• Advanced low-power electronic designs

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'SM' indicates the 8-lead SOIJ package. Confirm the datasheet revision matches the required specifications. Ensure the component meets RoHS compliance standards as documented in the official manufacturer release notes.

Memory IC Selection Notes

Select this component when a 128 Kbit EEPROM is required with a wide operating voltage range starting at 1.7V. It is suitable for designs needing I2C compatibility with a 400 kHz maximum clock rate. Consider the 64-byte page write buffer for efficient data handling and the hardware write-protect feature for critical data security requirements.

Memory IC Part Context

This part belongs to the 24XX128 family of 128K I2C CMOS Serial EEPROMs manufactured by Microchip Technology. The family includes variants such as the 24LC128 and 24FC128, which share similar architectures but differ in minimum operating voltage and maximum clock frequency specifications.

Memory IC Replacement Considerations

The 24AA128T-I/SN is a confirmed substitute offering identical electrical characteristics and memory organization within the same package family.

Memory IC FAQ

How does the Write-Protect (WP) pin function?

When the WP pin is tied to VCC, write operations are inhibited while read operations remain unaffected. Tying it to VSS enables write operations.

What is the maximum number of devices supported on a single bus?

Up to eight devices can be connected to the same bus by utilizing different combinations of the A0, A1, and A2 chip select pins.