24AA01-I/ST

Memory IC Overview

The Microchip Technology 24AA01-I/ST is a 1 Kbit (128 x 8) serial Electrically Erasable PROM (EEPROM). It operates on a single supply voltage ranging from 1.7V to 5.5V and supports I²C compatible 2-wire serial interfaces with clock frequencies up to 400 kHz at VCC ≥ 2.5V, or 100 kHz at VCC < 2.5V. The device features an 8-byte page write buffer, self-timed erase/write cycles of 5 ms maximum, and hardware write protection via the WP pin. It includes Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.

Memory IC Feature Summary

• Low-power CMOS technology enabling operation down to 1.7V with standby current as low as 1 µA.
• I²C compatible 2-wire serial interface with Schmitt trigger inputs for enhanced noise suppression.
• Hardware write-protect capability that inhibits all write operations when the WP pin is tied to VCC.
• High reliability with over one million erase/write cycles and data retention exceeding 200 years.

Memory IC Applications

• Data logging in industrial monitoring systems
• Configuration storage in consumer electronics
• Parameter memory in automotive sensor modules

Memory IC Procurement Notes

Verify the specific suffix 'I/ST' corresponds to the Industrial temperature range (-40°C to +85°C) and the 8-Lead TSSOP package. Confirm the operating voltage requirements align with the 1.7V minimum specification for the 24AA01 series. Ensure the design accounts for the 400 kHz maximum clock frequency limit at voltages above 2.5V.

Memory IC Selection Notes

Select this component for applications requiring low-voltage operation starting at 1.7V. The 24AA01 differs from the 24LC01B, which requires a minimum of 2.5V. Consider the 8-byte page write buffer size for write efficiency. Verify that the 8-pin TSSOP package fits the PCB layout constraints compared to other available packages like SOIC or MSOP.

Memory IC Part Context

This part belongs to the 24XX01 family, which also includes the 24LC01B and 24FC01. While sharing similar functionality and pinouts, the 24AA01 is distinguished by its lower minimum operating voltage of 1.7V compared to the 24LC01B's 2.5V requirement. The 'I' designation indicates the industrial temperature grade, and '/ST' specifies the 8-lead TSSOP surface-mount package.

Memory IC Replacement Considerations

The 24LC01B-I/ST is a functional substitute but requires a minimum supply voltage of 2.5V. The 24FC01-I/ST offers higher speed compatibility up to 1 MHz but shares the same 1.7V minimum voltage range. Verify package compatibility and voltage thresholds before substitution.