24LC128T-E/SM

Memory IC Overview

The Microchip Technology 24LC128T-E/SM is a 16K x 8 (128 Kbit) Serial Electrically Erasable PROM (EEPROM). It operates on a single supply voltage ranging from 2.5V to 5.5V and features an I2C compatible two-wire serial interface with a maximum clock frequency of 400 kHz. The device supports page write operations with a 64-byte buffer and includes hardware write protection via the WP pin. It is housed in an 8-lead MSOP 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 configurable chip select inputs.
• Includes Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.
• Features a self-timed erase/write cycle with a maximum page write time of 5 ms.

Memory IC Applications

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

Memory IC Procurement Notes

Verify that the ordering suffix 'E' corresponds to the Extended temperature range (-40°C to +125°C) and 'SM' indicates the 8-lead MSOP package. Confirm the specific datasheet revision matches the required electrical characteristics, as parameters like standby current vary between Industrial and Extended grades. Ensure the source documentation explicitly lists this part number within the 24LC128 family specifications.

Memory IC Selection Notes

Select this component when an I2C interface is required with a minimum operating voltage of 2.5V. The Extended temperature grade is necessary for environments exceeding standard industrial limits. The MSOP package is suitable for space-constrained surface-mount designs. Verify that the 400 kHz clock speed meets system timing requirements at the chosen supply voltage.

Memory IC Part Context

This device belongs to the 24XX128 family, which also includes the 24AA128 and 24FC128 variants. While sharing similar memory architecture and interface protocols, the 24LC128 is distinguished by its 2.5V minimum operating voltage compared to the 1.7V capability of other family members. The T suffix denotes tape and reel packaging.

Memory IC Replacement Considerations

Cross-reference with 24LC128T-I/SM for industrial temperature range or 24AA128T-E/SM for lower voltage operation. Verify compatibility with existing PCB footprints and software drivers before substitution.