24AA04-I/ST

Memory IC Overview

The Microchip Technology 24AA04-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 voltages of 2.5V or higher, with 100 kHz compatibility below 2.5V. The device includes a 16-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. It is rated for industrial temperatures (-40°C to +85°C), offers over one million erase/write cycles, and provides data retention exceeding 200 years.

Memory IC Feature Summary

• Low-power CMOS technology enabling operation down to 1.7V with minimal standby current
• I²C compatible two-wire serial interface supporting standard and fast mode speeds
• Hardware write-protect capability allowing entire memory array locking when WP pin is high
• Integrated output slope control to eliminate ground bounce during switching

Memory IC Applications

• Embedded systems requiring non-volatile storage for configuration parameters
• Industrial control devices needing reliable data logging under varying temperature conditions
• Consumer electronics utilizing low-voltage power supplies for persistent memory retention

Memory IC Procurement Notes

Verify that the ordering suffix 'ST' corresponds to the 8-Lead TSSOP package type as specified in the datasheet. Confirm the 'I' suffix indicates the Industrial temperature range (-40°C to +85°C). Ensure the component meets RoHS compliance requirements if applicable to your manufacturing standards. Cross-reference the specific revision level of the datasheet DS20001708P to guarantee electrical characteristic alignment.

Memory IC Selection Notes

Select this component when a 4-Kbit EEPROM is required with I²C connectivity and low-voltage support starting at 1.7V. It is suitable for designs where space is constrained due to the available TSSOP packaging option. Consider this part for applications demanding high endurance and long-term data retention without the need for complex external circuitry for write protection.

Memory IC Part Context

This device belongs to the 24XX04 family, which also includes the 24LC04B and 24FC04 variants. While sharing similar architectural features like the 4-Kbit capacity and I²C interface, the 24AA04 is distinguished by its lower minimum operating voltage of 1.7V compared to the 2.5V minimum of the 24LC04B. It shares the same physical package options but differs in electrical specifications regarding speed and voltage thresholds.

Memory IC Replacement Considerations

Direct substitutes within the same family include the 24AA04T-I/ST (tape and reel version) or other packages like 24AA04-I/SN (SOIC). For broader replacements, consider the 24LC04B series if the system voltage does not drop below 2.5V, or the 24FC04 series if higher clock speeds up to 1 MHz are required.