24AA04HT-I/SN

Memory IC Overview

The Microchip Technology 24AA04HT-I/SN is a 4-Kbit (512 x 8) Electrically Erasable PROM (EEPROM) featuring a two-wire I2C serial interface. It operates on a single supply voltage ranging from 1.7V to 5.5V with a maximum clock frequency of 400 kHz at VCC ≥ 2.5V, and 100 kHz when VCC is between 1.7V and 2.5V. The device includes hardware write-protect functionality for the upper half of the memory array (addresses 100h-1FFh). It supports page writes up to 16 bytes with a maximum cycle time of 5 ms. The component is housed in an 8-lead TSSOP package and is rated for industrial temperature operation from -40°C to +85°C.

Memory IC Feature Summary

• Hardware write-protect capability for the upper half of the memory array via the WP pin
• Low-power CMOS technology with standby current as low as 1 µA
• Schmitt trigger inputs and output slope control for noise suppression and ground bounce elimination
• Self-timed erase/write cycles with acknowledge polling support

Memory IC Applications

• Data logging in battery-powered devices
• Configuration storage in embedded systems
• Parameter retention in industrial controllers

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'ST' indicates the TSSOP package. Confirm the specific datasheet revision matches the required electrical characteristics, particularly regarding clock frequency limits at lower supply voltages. Ensure the application design accounts for the half-array write protection logic if full array access is needed.

Memory IC Selection Notes

Select this part for applications requiring low-voltage operation down to 1.7V and hardware-level write protection for critical data segments. It is suitable where space is constrained due to the compact TSSOP packaging. Consider the 400 kHz speed limit at standard voltages versus the 100 kHz limit at lower voltages when designing the system bus timing.

Memory IC Part Context

This component belongs to the 24AA04H series of 4-Kbit I2C Serial EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 24LC04BH and 24FC04H variants, differing primarily in minimum operating voltage and maximum clock frequency specifications. The 'HT' designation typically refers to the tape and reel packaging format for surface-mount assembly.

Memory IC Replacement Considerations

Direct functional substitutes within the same family include the 24AA04T-I/SN, which offers identical electrical characteristics but may differ in packaging quantity or reel specifications. Other compatible parts include the 24AA04-I/ST, though verification of the specific suffix requirements for temperature grade and package type is necessary.