24LC128-I/MS

Memory IC Overview

The Microchip Technology 24LC128-I/MS 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 rated for industrial temperature ranges (-40°C to +85°C) and housed in an 8-lead MSOP package.

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 64-byte page write buffer for efficient data transfer.

Memory IC Applications

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

Memory IC Procurement Notes

Verify that the specific ordering suffix corresponds to the MSOP package type, as other suffixes indicate different physical footprints. Confirm the 'I' designation matches the required industrial temperature range specifications for your application environment. Ensure compatibility with the 2.5V minimum operating voltage requirement before finalizing procurement.

Memory IC Selection Notes

Select this component when a 128 Kbit non-volatile memory solution is required within the 2.5V to 5.5V supply range. The MSOP package is suitable for space-constrained surface mount designs. Consider alternative packages if more than two devices need to be addressed on a single I2C bus due to limited address pins.

Memory IC Part Context

This part belongs to the 24XX128 family, which also includes the 24AA128 and 24FC128 variants. These devices share identical functional architectures but differ in supply voltage ranges and maximum clock frequencies. The 24LC128 specifically targets standard voltage applications compared to the lower voltage capabilities of the 24AA128.

Memory IC Replacement Considerations

Direct substitutes include other 24LC128 variants with different package suffixes such as 24LC128-I/SN or 24LC128-I/ST. Cross-brand replacements require verification of I2C timing parameters and voltage levels.

Memory IC FAQ

How many devices can be connected to the same bus using the MSOP package?

Only two 24LC128 MSOP packages can be connected to the same bus because the A0 and A1 chip select pins are not connected in this package type.

What is the function of the WP pin?

The WP pin provides hardware write protection. When tied to VCC, write operations are inhibited, while tying it to VSS enables write operations.