24AA08/SN

Memory IC Overview

The Microchip Technology 24AA08/SN is an 8-Kbit Electrically Erasable PROM (EEPROM) organized as four blocks of 256 x 8-bit memory. It features a two-wire serial interface compatible with I2C protocols. The device operates on a single supply voltage ranging from 1.7V to 5.5V, supporting maximum clock frequencies of 400 kHz at voltages above 2.5V and 100 kHz below 2.5V. It utilizes low-power CMOS technology with standby currents up to 1 µA and read currents up to 1 mA. The component supports page write operations with a 16-byte buffer and includes hardware write-protect capabilities via the WP pin.

Memory IC Feature Summary

• Supports bidirectional data transmission over a two-wire serial bus using standard I2C-compatible protocols.
• Includes Schmitt trigger inputs and filter circuits on SDA and SCL pins to suppress noise spikes.
• Features output slope control designed to eliminate ground bounce during signal transitions.
• Provides hardware write protection for the entire memory array when the WP pin is tied to VCC.

Memory IC Applications

• Data storage in industrial monitoring systems requiring non-volatile retention.
• Configuration parameter storage in consumer electronics operating at low voltages.
• Device identification and calibration data logging in embedded sensor networks.

Memory IC Procurement Notes

Verify that the ordering suffix 'SN' corresponds specifically to the 8-Lead SOIC package type as defined in the manufacturer's documentation. Confirm the temperature grade matches the required operational environment, as industrial grades are specified for -40°C to +85°C. Ensure compatibility with the system's I2C pull-up resistor values, which vary based on the selected clock frequency and supply voltage conditions.

Memory IC Selection Notes

Select this component when a low-voltage operation down to 1.7V is required alongside standard I2C connectivity. Consider the 16-byte page write buffer for applications needing efficient bulk data transfers. Evaluate the hardware write-protect feature if physical security against accidental overwrites is necessary. Compare against the 24LC08B variant if the application strictly requires a minimum 2.5V supply voltage instead of the 1.7V capability.

Memory IC Part Context

This part belongs to the 24XX08 family of 8-Kbit serial EEPROMs manufactured by Microchip Technology. The family includes variants such as the 24LC08B and 24FC08, which share similar architectural features but differ in supply voltage ranges and maximum clock speeds. The 24AA08 specifically targets applications requiring operation at lower voltages compared to other members of the series.

Memory IC Replacement Considerations

Public confirmed substitute part numbers: 24AA08T/SN, 24AA08-I/P

Memory IC FAQ

How does the Write-Protect (WP) pin function?

When the WP pin is connected to VCC, all write operations to the memory array are inhibited, providing hardware-level protection. Connecting it to VSS enables normal read and write access.

What happens if a page write crosses a physical page boundary?

If a page write command attempts to cross a physical page boundary, the data wraps around to the beginning of the current page, overwriting previously stored data, rather than proceeding to the next page.