24FC128-I/ST

Memory IC Overview

The Microchip Technology 24FC128-I/ST is a 16K x 8 (128 Kbit) Serial Electrically Erasable PROM (EEPROM). It operates with a single supply voltage ranging from 1.7V to 5.5V and supports I2C compatible two-wire serial interfaces at clock frequencies up to 1 MHz. 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 TSSOP package and functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports high-speed I2C communication with 1 MHz compatibility at voltages above 2.5V
• Includes a 64-byte page write buffer for efficient data transfer operations
• Features hardware write protection via the WP pin to secure memory arrays
• Utilizes Schmitt trigger inputs on SDA and SCL lines to suppress noise spikes

Memory IC Applications

• Personal communications devices requiring low-power non-volatile storage
• Data acquisition systems needing reliable parameter retention
• Industrial control applications operating across wide voltage ranges
• Embedded systems utilizing cascaded I2C bus architectures

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature grade (-40°C to +85°C) and '/ST' indicates the 8-lead TSSOP package. Confirm the specific voltage and speed requirements align with the 24FC128 series specifications rather than the 24LC128 or 24AA128 variants. Ensure the application design accounts for the 1.7V minimum operating voltage for this specific part number.

Memory IC Selection Notes

Select this component when operation below 2.5V is required alongside high-speed 1 MHz I2C performance. The 24FC128 differs from the 24LC128 by supporting lower voltage operation down to 1.7V while maintaining higher clock speeds. Consider the 64-byte page write buffer size for system throughput requirements and verify that the TSSOP package fits the available PCB footprint constraints.

Memory IC Part Context

This device belongs to the 24XX128 family, which includes the 24AA128, 24LC128, and 24FC128. These parts share identical pinouts and functional descriptions but differ in voltage ranges and maximum clock frequencies. The 24FC128 specifically bridges the gap between low-voltage operation and high-speed interface requirements within this memory series.

Memory IC Replacement Considerations

The 24LC128T-I/ST offers similar functionality but operates only from 2.5V to 5.5V and supports a maximum clock frequency of 400 kHz. The 24AA128 also supports 1.7V operation but is limited to 400 kHz clock speeds. Verify voltage headroom and bus speed requirements before substituting these alternatives.