24LC128T-I/SN

Memory IC Overview

The Microchip Technology 24LC128T-I/SN is a 128 Kbit (16K x 8) serial electrically erasable programmable read-only memory (EEPROM). It operates on a single supply voltage ranging from 2.5V to 5.5V and supports I²C two-wire serial interface with clock frequencies up to 400 kHz. The device features a 64-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. It is housed in an 8-lead SOIC 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 configurable chip select pins A0, A1, and A2.
• Includes a 64-byte page write buffer to facilitate efficient data storage operations.
• Provides hardware write protection capability through the dedicated WP pin.
• Features Schmitt trigger inputs designed to suppress noise spikes on the SDA and SCL lines.

Memory IC Applications

• Personal communications systems
• Data acquisition applications
• Industrial control systems

Memory IC Procurement Notes

Verify that the ordering suffix 'I' confirms the industrial temperature grade (-40°C to +85°C) and 'SN' specifies the 8-lead SOIC package. Confirm the 'T' suffix indicates tape and reel packaging. Ensure the component matches the 24LC128 series specifications, specifically the 2.5V minimum operating voltage, distinct from the 1.7V variants found in other family members.

Memory IC Selection Notes

Select this part when a 128 Kbit non-volatile memory solution is required with I²C compatibility. It is suitable for designs needing hardware write protection and high endurance. Consider the 2.5V minimum voltage requirement; if lower voltage operation down to 1.7V is necessary, the 24AA128 or 24FC128 variants should be evaluated instead.

Memory IC Part Context

This component belongs to the 24XX128 family, which includes the 24AA128, 24LC128, and 24FC128. These devices share identical pinouts and functional interfaces but differ in operating voltage ranges and maximum clock frequencies. The 24LC128 variant is optimized for standard 2.5V to 5.5V supply rails.

Memory IC Replacement Considerations

• 24LC128-I/SN
• 24LC128T-I/SM
• 24LC128T-I/ST