24LC128-I/P

Memory IC Overview

The Microchip Technology 24LC128-I/P is a 16K x 8 (128 Kbit) Serial Electrically Erasable PROM (EEPROM). It operates with a single supply voltage ranging from 2.5V to 5.5V and features a two-wire serial interface compatible with I2C protocols, supporting clock frequencies up to 400 kHz. The device utilizes low-power CMOS technology, ensuring a maximum write current of 3 mA and a standby current of 1 µA in industrial temperature ranges (-40°C to +85°C). It includes hardware write protection, Schmitt trigger inputs for noise suppression, and output slope control to eliminate ground bounce.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using configurable chip select inputs.
• Includes a 64-byte page write buffer to facilitate efficient data transfer operations.
• Features hardware write-protect capability via the WP pin to secure memory arrays.
• Provides high reliability with over one million erase/write cycles and data retention exceeding 200 years.

Memory IC Applications

• Personal communications equipment requiring persistent configuration storage
• Data acquisition systems needing non-volatile parameter logging
• Industrial controllers utilizing I2C bus architectures for memory expansion

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the voltage range requirements align with the 2.5V minimum specification for the 24LC128 variant, distinct from lower voltage alternatives. Ensure compatibility with existing I2C bus pull-up resistor values for the target clock frequency.

Memory IC Selection Notes

Select this component when an I2C-compatible EEPROM with a 2.5V to 5.5V operating range is required. The Industrial temperature grade (-40°C to +85°C) suits general commercial and industrial environments. Consider alternative packages if surface mount or smaller form factors are necessary, as this part number specifies the PDIP-8 through-hole package.

Memory IC Part Context

This device belongs to the 24XX128 family, which also includes the 24AA128 and 24FC128 variants. While sharing identical memory organization and interface protocols, these siblings differ in minimum operating voltage and maximum clock frequency specifications. The 24LC128 specifically targets applications requiring operation down to 2.5V rather than 1.7V.

Memory IC Replacement Considerations

Public confirmed substitute part numbers: 24LC128-E/P, 24LC128-I/SN, 24LC128-I/ST, 24LC128T-I/SMG, 24LC128-E/SN.