24LC256T-E/ST16KVAO

Memory IC Overview

The Microchip Technology 24LC256T-E/ST16KVAO is a 32K x 8 (256-Kbit) Serial Electrically Erasable PROM (EEPROM). It operates with a supply voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 400 kHz via an I²C compatible two-wire serial interface. The device features a 64-byte page write buffer, hardware write-protect capability, and Schmitt trigger inputs for noise suppression. It is qualified under the AEC-Q100 automotive standard and offers data retention exceeding 200 years with over one million erase/write cycles.

Memory IC Feature Summary

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

Memory IC Applications

• Automotive electronic systems requiring AEC-Q100 qualification
• Data acquisition applications needing non-volatile storage
• Personal communication devices utilizing low-power CMOS technology

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type, temperature grade, and reel specifications. Confirm the presence of the '16KVAO' designation aligns with your manufacturing requirements. Ensure compatibility with the 2.5V minimum operating voltage before finalizing procurement orders.

Memory IC Selection Notes

Select this component when an I²C interface is required for memory expansion in space-constrained designs. The TSSOP package suits surface-mount assembly processes. Consider the 400 kHz speed limit and 2.5V minimum voltage threshold against system power rails and bus timing constraints.

Memory IC Part Context

This part belongs to the 24XX256 family of 256-Kbit serial EEPROMs manufactured by Microchip Technology. The family includes variants like the 24AA256 and 24FC256, which differ primarily in voltage ranges and clock speeds. The 24LC256 variant specifically targets applications requiring a 2.5V to 5.5V supply range.

Memory IC Replacement Considerations

Direct substitutes within the same family include the 24LC256-E/ST or 24LC256T-I/ST. Verify that alternative packages or temperature grades meet the specific environmental and form-factor requirements of the design.

Memory IC FAQ

How does the hardware write-protect feature function?

The WP pin allows users to write-protect the entire array. When tied to VCC, write operations are inhibited, while read operations remain unaffected. When tied to VSS, write protection is disabled.

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 bits.