24AA256T-E/ST

Memory IC Overview

The Microchip Technology 24AA256T-E/ST is a 32K x 8 (256-Kbit) Serial Electrically Erasable PROM (EEPROM). It operates on a single supply voltage ranging from 1.7V to 5.5V and supports a maximum clock frequency of 400 kHz via an I2C compatible two-wire serial interface. The device features a page write buffer of up to 64 bytes, with a maximum page write time of 5 ms. It is housed in an 8-lead TSSOP package and is rated for extended temperature operation from -40°C to +125°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using hardware address inputs.
• Includes Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.
• Features hardware write protection controlled by the WP pin to inhibit array writes.

Memory IC Applications

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

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required temperature grade and package type. Confirm the presence of the 'T' suffix indicates tape and reel packaging. Ensure the 'E' designation aligns with the extended industrial temperature range requirements of the target application environment.

Memory IC Selection Notes

Select this component when a 256-Kbit non-volatile memory solution is required with I2C compatibility. The 24AA256 series is suitable for applications needing operation down to 1.7V. Verify that the system design accommodates the 400 kHz maximum clock speed and the specific 8-TSSOP footprint constraints.

Memory IC Part Context

This part belongs to the 24XX256 family, which includes the 24AA256, 24LC256, and 24FC256 variants. These devices share similar functional architectures but differ in minimum operating voltage and maximum clock frequency specifications. The 24AA256 specifically supports operation down to 1.7V.

Memory IC Replacement Considerations

Compatible substitutes within the same family include the 24AA256-I/ST for industrial temperature ranges or the 24LC256-E/ST if the minimum voltage requirement is 2.5V. Cross-referencing datasheets is necessary to confirm voltage and speed compatibility.