24AA02HT-I/OT

Memory IC Overview

The Microchip Technology 24AA02HT-I/OT is a 2 Kbit (256 x 8) serial EEPROM featuring an I²C 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 includes hardware write-protect capabilities for the upper half of the memory array and supports page writes of up to 8 bytes. It is housed in a 5-lead SOT-23 package and functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Hardware write-protect capability for the upper half of the memory array via the WP pin
• Schmitt trigger inputs and output slope control for noise suppression and ground bounce elimination
• Supports both 100 kHz and 400 kHz clock frequencies depending on supply voltage
• Includes an 8-byte page write buffer to optimize data transfer efficiency

Memory IC Applications

• Industrial systems requiring non-volatile data storage
• Embedded controllers needing configuration parameter retention
• Low-power portable devices operating at voltages down to 1.7V

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the 'I' indicates the industrial temperature grade and 'OT' specifies the SOT-23 packaging. Confirm that the application design accommodates the half-array write-protect feature if full memory access is required by tying the WP pin appropriately. Ensure the host controller supports the I²C protocol timing specifications defined in the datasheet.

Memory IC Selection Notes

Select this component when a small footprint is necessary due to its 5-lead SOT-23 package. It is suitable for designs requiring operation at supply voltages as low as 1.7V. Consider the hardware write-protect feature if protection against accidental overwriting of the upper memory addresses is needed without software intervention.

Memory IC Part Context

This part belongs to the 24XX02H family of 2 Kbit serial EEPROMs manufactured by Microchip Technology. The family shares common electrical characteristics and interface protocols but differs in package options and minimum operating voltages between the AA and LC variants. The 24AA02H variant specifically supports lower voltage operation starting at 1.7V.

Memory IC Replacement Considerations

• 24LC02BH

Memory IC FAQ

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

When tied to VSS, normal read/write operations are enabled for the entire memory. When tied to VCC, write operations are inhibited for the upper half of the array (addresses 80h-FFh), while read operations remain unaffected.

What is the maximum page write size?

The device features an 8-byte page write buffer, allowing up to 8 bytes of data to be written in a single transaction before a Stop condition initiates the internal write cycle.