24AA04T-I/SN

Memory IC Overview

The Microchip Technology 24AA04T-I/SN is a 4-Kbit Electrically Erasable PROM (EEPROM) organized as two blocks of 256 x 8-bit memory. It features a Two-Wire Serial Interface compatible with I2C protocols and operates on a single supply voltage ranging from 1.7V to 5.5V. The device supports a maximum clock frequency of 400 kHz at voltages above 2.5V, or 100 kHz when the supply voltage is between 1.7V and 2.5V. It utilizes low-power CMOS technology, ensuring standby current remains at a maximum of 1 µA in industrial temperature ranges.

Memory IC Feature Summary

• Supports bidirectional data transmission via a standard Two-Wire Serial Interface compatible with I2C protocols.
• Includes hardware write-protect functionality controlled by the WP pin to inhibit write operations across the entire memory array.
• Features Schmitt Trigger inputs and filter circuits on SCL and SDA lines to suppress noise spikes and ensure reliable operation.
• Incorporates a 16-byte page write buffer that allows multiple bytes to be temporarily stored before being written to memory upon a Stop condition.

Memory IC Applications

• Data logging applications requiring non-volatile storage for sensor readings or system parameters.
• Configuration storage in embedded systems where small amounts of user-defined settings must be retained during power loss.
• Device identification and calibration data retention in consumer electronics and industrial controllers.

Memory IC Procurement Notes

Verify the specific suffix 'I' indicates the Industrial temperature range (-40°C to +85°C) and 'SN' denotes the 8-Lead SOIC package. Confirm the 'T' suffix corresponds to tape-and-reel packaging if bulk quantities are required. Ensure the application voltage meets the minimum 1.7V requirement for full feature compatibility. Cross-reference the datasheet revision date to confirm electrical characteristics match the production batch.

Memory IC Selection Notes

Select this component when a 4-Kbit capacity is sufficient for the application's data retention needs. Choose this part over the 24LC04B variant if operation below 2.5V is required, as the 24LC04B requires a minimum of 2.5V. Consider the 24FC04 only if a higher clock speed of 1 MHz is necessary at all operating voltages. Verify that the 8-SOIC package dimensions fit the available PCB space and that the host controller supports the I2C protocol timing requirements.

Memory IC Part Context

This device belongs to the 24XX04 family of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 24LC04B and 24FC04 but differs in voltage thresholds and clock speeds. The 24AA04 specifically targets low-voltage applications starting at 1.7V, whereas other family members may have different operational limits. All variants utilize the same basic I2C interface and memory organization structure.

Memory IC Replacement Considerations

The 24AA04-I/SN is a direct equivalent to the 24AA04T-I/SN, differing only in tube versus tape-and-reel packaging. The 24LC04B-I/SN serves as a functional substitute but requires a minimum supply voltage of 2.5V. The 24FC04-I/SN offers faster 1 MHz operation but maintains the same 1.7V lower voltage limit. Ensure any replacement matches the specific temperature grade and package footprint.