24LC128T-I/MF

Memory IC Overview

The Microchip Technology 24LC128T-I/MF 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 I2C compatible two-wire serial interface communication 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 housed in an 8-lead DFN package and is rated for industrial temperature operation from -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 writing operations.
• Features hardware write protection via the WP pin to inhibit array writes when tied to VCC.
• Incorporates Schmitt trigger inputs on SDA and SCL pins to suppress noise spikes.

Memory IC Applications

• Personal communications systems requiring non-volatile data storage
• Data acquisition applications needing low-power memory solutions
• Industrial control systems utilizing I2C bus architectures

Memory IC Procurement Notes

Verify that the ordering suffix MF corresponds specifically to the 8-lead DFN package type. Confirm the temperature grade 'I' matches the required industrial range of -40°C to +85°C. Ensure the voltage specification aligns with the 2.5V minimum requirement distinct from other variants in the series.

Memory IC Selection Notes

Select this component when a 128Kb EEPROM with I2C interface is required within the 2.5V to 5.5V operating range. The Industrial temperature grade (-40°C to +85°C) suits standard commercial and industrial environments. The DFN package offers a compact footprint suitable for space-constrained designs compared to larger packages like SOIC or PDIP.

Memory IC Part Context

This part belongs to the 24XX128 family, which includes the 24AA128, 24LC128, and 24FC128. While sharing core architecture, the 24LC128 variant specifically requires a minimum supply voltage of 2.5V, unlike the 24AA128 and 24FC128 which support operation down to 1.7V. The 'MF' suffix denotes the specific 8-lead DFN physical packaging.

Memory IC Replacement Considerations

Direct replacements include other 24LC128 variants with different packages such as 24LC128T-I/ST (TSSOP) or 24LC128T-I/MNY (TDFN), provided the board layout accommodates the pinout differences. Cross-family substitutes like 24AA128 or 24FC128 are functionally similar but differ in minimum voltage requirements and maximum clock speeds.

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 configuring the chip select bits A0, A1, and A2.

What is the purpose of the WP pin?

The Write-Protect (WP) pin allows hardware protection of the entire memory array. Tying it to VCC inhibits write operations, while tying it to VSS enables them.

Does the device support sequential reads?

Yes, the device contains an internal address pointer that increments automatically, allowing sequential reading of multiple bytes until a Stop condition is generated.