24AA04HT-I/ST

Memory IC Overview

The Microchip Technology 24AA04HT-I/ST is a 4-Kbit (512 x 8) Electrically Erasable PROM (EEPROM) featuring a two-wire I2C compatible serial interface. It operates on a single supply voltage ranging from 1.7V to 5.5V and supports clock frequencies up to 400 kHz at VCC ≥ 2.5V, or 100 kHz at lower voltages. The device 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 1 µA and read current of 1 mA. The component is housed in an 8-lead TSSOP package and is rated for industrial temperature operation between -40°C and +85°C.

Memory IC Feature Summary

• Hardware write-protect capability for the upper half of the memory array via the WP pin
• Low-voltage operation down to 1.7V with minimal active and standby power consumption
• I2C compatible two-wire serial interface with Schmitt trigger inputs for noise suppression
• Self-timed erase/write cycles with automatic page write buffer management

Memory IC Applications

• Data logging in battery-powered devices requiring low standby current
• Configuration storage in consumer electronics utilizing I2C buses
• Parameter retention in automotive systems operating within industrial temperature ranges
• Smart card applications requiring half-array write protection

Memory IC Procurement Notes

Verify that the ordering suffix 'T' corresponds to the specific tape-and-reel packaging configuration required for your assembly process. Confirm the 'I' designation matches the necessary industrial temperature range specifications (-40°C to +85°C). Ensure the 'ST' suffix aligns with the 8-lead TSSOP package dimensions needed for your PCB footprint design.

Memory IC Selection Notes

Select this component when a 4-Kbit EEPROM with hardware write-protect features is required. It is suitable for designs needing operation at supply voltages as low as 1.7V. Choose this part over variants like the 24LC04BH if lower minimum voltage operation is necessary, or over the 24FC04H if 400 kHz speed is sufficient instead of 1 MHz requirements.

Memory IC Part Context

This device belongs to the 24XX04H family of serial EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 24LC04BH and 24FC04H but differs in voltage thresholds and maximum clock speeds. The 'HT' suffix indicates a specific tape-and-reel packaging variant within the standard 24AA04H product line.

Memory IC Replacement Considerations

Direct substitutes include the 24AA04H-I/ST for identical electrical characteristics without the reel packaging suffix, or the 24AA04T-I/MC for alternative surface-mount packaging options.