24AA01T-I/OT

Memory IC Overview

The Microchip Technology 24AA01T-I/OT is a 1 Kbit (128 x 8) Electrically Erasable PROM (EEPROM) featuring a 2-wire I2C compatible serial interface. It operates on a single supply voltage ranging from 1.7V to 5.5V with an industrial temperature range of -40°C to +85°C. The device supports a maximum clock frequency of 400 kHz and includes an 8-byte page write buffer. Key electrical characteristics include a maximum standby current of 1 µA, a typical access time of 900 ns at VCC ≥ 2.5V, and hardware write protection via the WP pin.

Memory IC Feature Summary

• Low-power CMOS technology enabling operation down to 1.7V with minimal active and standby currents.
• Integrated 8-byte page write buffer for efficient data transfer and reduced bus overhead.
• Hardware write-protect capability that inhibits all memory writes when the WP pin is tied high.
• Schmitt trigger inputs and noise filtering on SDA and SCL lines to suppress signal spikes.

Memory IC Applications

• Data logging in battery-powered portable devices
• Configuration storage in embedded systems
• Parameter retention in industrial control modules

Memory IC Procurement Notes

Verify the specific suffix 'I/OT' corresponds to the Industrial temperature grade (-40°C to +85°C) and the 5-Lead SOT-23 package type. Confirm RoHS compliance status and ensure the ordering quantity matches the manufacturer's standard tape and reel specifications for this package variant.

Memory IC Selection Notes

Select this component for applications requiring low-voltage operation starting at 1.7V and robust noise immunity in compact designs. The 5-lead SOT-23 package offers space efficiency compared to larger footprints. Ensure the system design accommodates the 400 kHz I2C speed limit and utilizes the hardware write-protect feature if data integrity against accidental writes is required.

Memory IC Part Context

This part belongs to the 24XX01 family of 1 Kbit serial EEPROMs, which also includes the 24LC01B and 24FC01 variants. While sharing the same memory architecture and interface protocol, the 24AA01 series is distinguished by its lower minimum operating voltage of 1.7V compared to the 2.5V requirement of the 24LC01B.

Memory IC Replacement Considerations

Direct functional substitutes within the same package and specification include the 24AA01T-E/OT for extended temperature ranges or other 24AA01 variants in the SOT-23-5 package. Cross-family replacements like the 24LC01B require verification of the higher minimum voltage requirement.