24AA08/ST

Memory IC Overview

The Microchip Technology 24AA08/ST is an 8-Kbit (1K x 8) Electrically Erasable PROM (EEPROM) housed in an 8-lead SOIC package. It operates on a single supply voltage ranging from 1.7V to 5.5V with a maximum clock frequency of 400 kHz at voltages above 2.5V, and 100 kHz below that threshold. The device features a two-wire I2C compatible serial interface, hardware write protection via the WP pin, and a 16-byte page write buffer. It supports industrial temperature ranges (-40°C to +85°C), offers over one million erase/write cycles, and retains data for more than 200 years.

Memory IC Feature Summary

• Supports bidirectional two-wire serial communication protocol compatible with I2C standards
• Includes hardware write protection capability controlled by the dedicated WP pin
• Features Schmitt trigger inputs and output slope control for noise suppression and ground bounce elimination

Memory IC Applications

• Data storage for system configuration parameters
• Calibration value retention in embedded systems
• Identification code storage for peripheral devices

Memory IC Procurement Notes

Verify the specific suffix 'ST' corresponds to the 8-lead SOIC package variant when sourcing. Confirm the required operating voltage range aligns with the 1.7V minimum specification for the 24AA08 series. Ensure the design accommodates the necessary pull-up resistors for the SDA and SCL lines based on the selected bus speed. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Memory IC Selection Notes

Select this component for applications requiring low-power non-volatile memory with standard I2C connectivity. The 24AA08 is suitable for designs needing hardware-level write protection to prevent accidental data corruption. Consider the 8-lead SOIC package for through-hole or surface-mount assembly flexibility. Evaluate the 400 kHz clock speed requirement against the host controller's capabilities to ensure bus compatibility.

Memory IC Part Context

This part belongs to the Microchip 24XX08 family of 8-Kbit serial EEPROMs, which also includes the 24LC08B and 24FC08 variants. While sharing similar memory architecture and interface protocols, these variants differ in minimum operating voltage and maximum clock frequency specifications. The 24AA08 specifically supports operation down to 1.7V, distinguishing it from the 2.5V minimum requirement of the 24LC08B.

Memory IC Replacement Considerations

Direct substitutes within the same package include other 24AA08 variants with different temperature grades or packaging options, such as 24AA08-I/SN or 24AA08-E/MC. Cross-family replacements like the 24LC08B require verification of the minimum supply voltage constraints.