24LC128T-I/ST14

Memory IC Overview

The Microchip Technology 24LC128T-I/ST14 is a 16K x 8 (128 Kbit) Serial Electrically Erasable PROM (EEPROM). It operates with a supply voltage range of 2.5V to 5.5V and supports I2C compatible two-wire serial interface at clock frequencies up to 400 kHz. The device features a 64-byte page write buffer, hardware write-protect capability, and Schmitt trigger inputs for noise suppression. It is available in an 8-TSSOP package and functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using functional address lines A0, A1, and A2.
• Includes a 64-byte page write buffer to facilitate efficient data storage operations.
• Features hardware write protection via the WP pin to inhibit array writes when tied to VCC.
• Incorporates Schmitt trigger inputs and output slope control to suppress noise and eliminate ground bounce.

Memory IC Applications

• Personal communications systems requiring non-volatile data retention
• Data acquisition applications needing low-power memory solutions
• Industrial control systems operating within extended temperature ranges

Memory IC Procurement Notes

Verify that the ordering suffix 'ST' corresponds to the 8-TSSOP package type as specified in the manufacturer's documentation. Confirm that the 'I' designation aligns with the required industrial temperature range specifications for your specific application environment before finalizing procurement.

Memory IC Selection Notes

Select this component when a 128 Kbit EEPROM with I2C interface is required. Ensure the system voltage meets the minimum 2.5V requirement, as lower voltages are not supported by the LC variant. Consider the 64-byte page size limitations for write operations and verify that the TSSOP package dimensions fit the target PCB layout constraints.

Memory IC Part Context

This part belongs to the 24XX128 family, which includes the 24AA128 and 24FC128 variants. While sharing similar architecture, the 24LC128 specifically requires a higher minimum supply voltage compared to the AA and FC series. It is designed for low-power CMOS technology applications where non-volatile storage is essential.

Memory IC Replacement Considerations

The 24LC128T-I/MS serves as a direct package alternative in MSOP format. Cross-referencing with 24AA128 or 24FC128 models requires verifying voltage compatibility, as these variants support operation down to 1.7V unlike the 2.5V minimum of the 24LC128.

Memory IC FAQ

How many devices can be connected to the same I2C bus?

Up to eight 24LC128 devices can be connected to the same bus by utilizing different combinations of the chip select bits A0, A1, and A2.

What is the function of the WP pin?

The Write-Protect (WP) pin inhibits write operations to the entire array when tied to VCC. When tied to VSS, write operations are enabled.