24AA04HT-I/MS

Memory IC Overview

The Microchip Technology 24AA04HT-I/MS 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 supports page writes up to 16 bytes with a maximum write cycle time of 5 ms. It includes hardware write-protect functionality for the upper half of the memory array (addresses 100h-1FFh) via the WP pin. Packaged in an 8-lead MSOP, it is rated for industrial temperatures 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 automatic end-of-write detection

Memory IC Applications

• Smart cards and security tokens requiring data retention
• Industrial control systems operating in noisy environments
• Consumer electronics utilizing I2C communication protocols
• Automotive applications meeting AEC-Q100 qualification standards

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the Industrial temperature range (-40°C to +85°C) and 'MS' denotes the 8-lead MSOP package. Confirm that the 'T' indicates tape and reel packaging if required for automated assembly. Ensure the device version matches the latest datasheet revision DS20002119C to validate electrical characteristics and pinout compatibility before finalizing procurement orders.

Memory IC Selection Notes

Select this component when a 4-Kbit non-volatile memory solution is needed with hardware-level write protection for critical data segments. It is suitable for designs requiring operation down to 1.7V, making it ideal for battery-powered or low-voltage systems. Choose this part over variants like 24LC04BH if lower voltage operation below 2.5V is required, or over 24FC04H if 400 kHz speed is sufficient instead of 1 MHz.

Memory IC Part Context

This device belongs to the 24XX04H family of 4-Kbit I2C Serial EEPROMs, which also includes the 24LC04BH and 24FC04H models. While sharing similar architecture and interfaces, these variants differ in minimum operating voltage and maximum clock frequency. The 24AA04H specifically supports operation down to 1.7V with a 400 kHz limit, distinguishing it from the higher-speed 24FC04H and the 2.5V-only 24LC04BH.

Memory IC Replacement Considerations

Direct substitutes within the same package include other 24AA04H variants such as 24AA04H-I/SN (SOIC) or 24AA04H-I/P (PDIP). Cross-family replacements like 24LC04BH require verifying that the system voltage does not drop below 2.5V. Higher-performance alternatives like 24FC04H offer 1 MHz speeds but must be evaluated for power consumption and voltage compatibility.