24AA16HT-I/OT

Memory IC Overview

The Microchip Technology 24AA16HT-I/OT is a 16-Kbit (2k x 8) serial Electrically Erasable PROM featuring an I²C-compatible two-wire interface. It operates on a single supply voltage ranging from 1.7V to 5.5V with a maximum clock frequency of 400 kHz at voltages above 2.5V, and 100 kHz below 2.5V. The device utilizes low-power CMOS technology, drawing a maximum active read current of 1 mA and standby current of 1 μA in industrial temperature conditions (-40°C to +85°C). It includes hardware write protection for the upper half of the memory array (addresses 400h-7FFh) via the WP pin and supports page writes of up to 16 bytes.

Memory IC Feature Summary

• Hardware write protection mechanism allows selective locking of the upper half of the memory array when the WP pin is tied high.
• Integrated Schmitt trigger inputs and noise suppression filters ensure reliable data transmission on electrically noisy bus environments.
• Supports acknowledge polling to maximize bus throughput by allowing the master to detect completion of internal write cycles.

Memory IC Applications

• Data logging systems requiring non-volatile storage for sensor readings or event timestamps
• Configuration storage for microcontroller-based embedded devices
• Calibration data retention in industrial instrumentation

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the voltage range compatibility with the target system's power supply rails. Ensure the design accounts for the pull-up resistor requirements on the SDA and SCL lines as specified in the electrical characteristics table.

Memory IC Selection Notes

Select this component for applications requiring small footprint surface-mount packaging with integrated write protection. Compare against standard 24AA16 variants if half-array protection is unnecessary. Consider the 24FC16H series if higher clock speeds up to 1 MHz are required within the same voltage range.

Memory IC Part Context

This part belongs to the 24XX16H family of 16-Kbit serial EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 24LC16BH and 24FC16H but is distinguished by its 1.7V minimum operating voltage and 400 kHz maximum clock speed. The 'I' designation indicates industrial temperature rating, while '/OT' specifies the 5-lead SOT-23 package.

Memory IC Replacement Considerations

Direct functional substitutes include other 24AA16H variants in different packages such as 24AA16HT-I/MNY or 24AA16HT-E/ST. Cross-family replacements like 24LC16B require verification of the 2.5V minimum voltage constraint.