24FC04HT-E/Q4B

Memory IC Overview

The Microchip Technology 24FC04HT-E/Q4B is a 4-Kbit Electrically Erasable PROM (EEPROM) organized as two blocks of 256 x 8-bit memory. It features a two-wire serial interface compatible with I2C protocols, supporting clock frequencies up to 1 MHz when VCC is between 1.7V and 5.5V. The device operates on a single supply voltage ranging from 1.7V to 5.5V and includes hardware write-protect functionality for the upper half of the memory array (addresses 100h-1FFh). It utilizes low-power CMOS technology with maximum standby current of 3 µA at extended temperatures and active read current of 1 mA. The component is housed in an 8-lead UDFN package and supports page writes of up to 16 bytes.

Memory IC Feature Summary

• Hardware write protection for the upper half of the memory array via the WP pin
• Low-voltage operation down to 1.7V with high noise immunity Schmitt trigger inputs
• I2C compatible two-wire serial interface supporting 1 MHz clock frequency
• Enhanced ESD protection exceeding 4,000V and latch-up resistance

Memory IC Applications

• Industrial control systems requiring non-volatile data storage
• Consumer electronics utilizing low-voltage power supplies
• Automotive applications meeting AEC-Q100 qualification standards
• Embedded systems needing secure configuration parameter retention

Memory IC Procurement Notes

Verify that the ordering suffix 'E' corresponds to the Extended temperature range (-40°C to +125V) and 'Q4B' indicates the specific 8-lead UDFN package variant. Confirm that the 'T' suffix denotes tape and reel packaging if required by automated assembly processes. Ensure compatibility with the host system's I2C bus voltage levels and pull-up resistor requirements for reliable communication at the selected clock speed.

Memory IC Selection Notes

Select this component when application requirements demand operation below 2.5V, as other variants in the family may require higher minimum voltages. Choose the Extended temperature grade if the operating environment exceeds standard industrial limits. The UDFN package is suitable for space-constrained designs, while the half-array write protect feature provides necessary security for critical data segments without software overhead.

Memory IC Part Context

This part belongs to the 24XX04H family of 4-Kbit serial EEPROMs, which also includes the 24AA04H and 24LC04BH variants. While sharing similar architectural features and memory organization, the 24FC04H series is distinguished by its support for higher clock speeds up to 1 MHz compared to the 400 kHz limit of other family members. The specific model integrates the extended temperature rating and compact surface-mount packaging into this unified specification.

Memory IC Replacement Considerations

Direct replacements within the same package and electrical specifications include the 24FC04HT-I/Q4B for industrial temperature ranges. For applications not requiring extended temperature performance, the 24FC04H-I/Q4B serves as a functional equivalent. Verify that any substitute maintains the 1.7V minimum operating voltage and 1 MHz clock capability to ensure signal integrity.