24LC128-E/MS

Memory IC Overview

The Microchip Technology 24LC128-E/MS 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 supports a maximum clock frequency of 400 kHz via an I2C compatible two-wire serial interface. The device features a 64-byte page write buffer, hardware write-protect capability, and Schmitt trigger inputs for noise suppression. It is housed in an 8-lead MSOP package and is rated for an industrial temperature range of -40°C to +125°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using configurable chip address inputs.
• Includes hardware write-protect functionality controlled by the WP pin to inhibit write operations.
• Features output slope control designed to eliminate ground bounce during operation.

Memory IC Applications

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

Memory IC Procurement Notes

Verify that the ordering suffix correctly identifies the MSOP package type and Extended temperature grade. Confirm the specific datasheet revision matches the required electrical characteristics. Ensure compatibility with the target system's I2C bus voltage levels and timing requirements before finalizing procurement.

Memory IC Selection Notes

Select this component when an extended temperature range up to 125°C is required alongside standard I2C connectivity. The MSOP package offers a compact surface-mount solution suitable for space-constrained designs. Consider the 64-byte page write buffer efficiency for applications requiring frequent data updates.

Memory IC Part Context

This part belongs to the 24XX128 family of 128K I2C Serial EEPROMs manufactured by Microchip Technology. The family includes variants like the 24AA128 and 24FC128, which differ primarily in minimum operating voltage and maximum clock speed specifications while sharing similar functional architectures.

Memory IC Replacement Considerations

Direct substitutes within the same package and temperature grade include other 24LC128 variants such as 24LC128T-E/MS or 24LC128-E/ST if pin-compatible packages are acceptable. Verify that any replacement maintains the 2.5V to 5.5V operating voltage range and 400 kHz interface speed.

Memory IC FAQ

How many devices can be connected to the same I2C bus using the 24LC128-E/MS?

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

What is the function of the WP pin on the 24LC128-E/MS?

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