24AA01/SN

Memory IC Overview

The Microchip Technology 24AA01/SN 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 a maximum clock frequency of 400 kHz. The device utilizes low-power CMOS technology, drawing a maximum read current of 1 mA and standby current of 1 µA. It includes an 8-byte page write buffer, hardware write-protect capability via the WP pin, and Schmitt trigger inputs for noise suppression. The component supports self-timed erase/write cycles and offers data retention exceeding 200 years.

Memory IC Feature Summary

• Supports bidirectional 2-wire serial communication protocol with I2C compatibility
• Features hardware write protection to inhibit memory writes when the WP pin is tied high
• Includes internal address pointer for sequential reading and automatic incrementing
• Provides noise suppression through Schmitt trigger inputs and output slope control

Memory IC Applications

• Low-voltage embedded systems requiring non-volatile data storage
• Industrial applications operating within -40°C to +85°C temperature ranges
• Devices utilizing I2C bus architecture for configuration or parameter storage
• Battery-powered equipment benefiting from ultra-low standby current consumption

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the base part number covers multiple physical formats. Confirm the voltage range requirements align with the 1.7V minimum specification for the 24AA01 variant. Ensure the design accounts for the 400 kHz maximum clock speed limitation at voltages above 2.5V. Check for any recent Product Change Notifications regarding assembly or material changes.

Memory IC Selection Notes

Select this component when a 1 Kbit capacity is sufficient for the application's data storage needs. Choose this part over the 24LC01B if operation below 2.5V is required, as the 24LC01B has a 2.5V minimum limit. Consider the 24FC01 if higher clock speeds up to 1 MHz are necessary. Ensure the system design accommodates the open-drain nature of the SDA and SCL lines by including appropriate pull-up resistors.

Memory IC Part Context

The 24AA01 belongs to the 24XX01 family of 1 Kbit serial EEPROMs manufactured by Microchip Technology. This family shares common functional characteristics but differs in electrical specifications such as operating voltage and clock frequency. The 'SN' suffix specifically denotes the 8-lead Small Outline Integrated Circuit (SOIC) package with a 3.90 mm body width. Other variants in the series include the 24LC01B and 24FC01.

Memory IC Replacement Considerations

Public confirmed substitute part numbers: 24AA01T-I/SN, 24AA01HT-I/SN.