24AA08H-I/MS

Memory IC Overview

The Microchip Technology 24AA08H-I/MS is an 8 Kbit Electrically Erasable PROM organized as four blocks of 256 x 8-bit memory. It features a 2-wire I2C compatible serial interface with a maximum clock frequency of 400 kHz for VCC between 2.5V and 5.5V, and 100 kHz for VCC between 1.7V and 2.5V. The device operates on a single supply voltage ranging from 1.7V to 5.5V. It includes a 16-byte page write buffer, hardware write-protect capability for the upper half of the array (addresses 200h-3FFh), and Schmitt trigger inputs for noise suppression. The component is housed in an 8-lead MSOP package and supports industrial temperature ranges.

Memory IC Feature Summary

• Supports low-voltage operation down to 1.7V with minimal active and standby current consumption.
• Provides hardware write protection for the upper half of the memory array via the WP pin.
• Features a 16-byte page write buffer to enhance bus throughput during data programming.
• Includes Schmitt trigger inputs and output slope control to suppress noise and eliminate ground bounce.

Memory IC Applications

• Data logging in battery-powered portable devices
• Configuration storage in consumer electronics
• Parameter retention in industrial instrumentation

Memory IC Procurement Notes

Verify that the ordering suffix matches the required package type and temperature grade. Confirm the specific voltage range requirements align with the 1.7V to 5.5V specification. Ensure compatibility with the I2C bus protocol and check for any recent Product Change Notifications regarding packaging or material composition updates before finalizing procurement.

Memory IC Selection Notes

Select this component when an 8 Kbit EEPROM with low-voltage support is required. The MSOP package is suitable for space-constrained surface-mount designs. Consider the hardware write-protect feature if security for the upper memory half is necessary. Verify that the system's I2C bus speed does not exceed 400 kHz at the operating voltage.

Memory IC Part Context

This part belongs to the 24AA08H/24LC08BH family of 8 Kbit serial EEPROMs. It shares functional similarities with other members of the series but differs in minimum operating voltage and package options. The 'I' suffix indicates an industrial temperature rating, while 'MS' denotes the Mini-Small Outline Package variant.

Memory IC Replacement Considerations

Direct substitutes within the same family include the 24AA08H-I/SN (SOIC) and 24AA08H-I/P (PDIP). Cross-family replacements like the 24LC08B require verification of the higher minimum voltage requirement of 2.5V.

Memory IC FAQ

How is the hardware write-protect function implemented?

The WP pin controls write protection. Tying WP to VCC inhibits write operations to the upper half of the memory array (addresses 200h-3FFh), while tying it to VSS enables full read/write access.

What is the behavior of the address pointer during a page write?

During a page write, the lower-order bits of the address pointer increment internally for each byte written. If more than 16 bytes are transmitted, the pointer rolls over, causing new data to overwrite existing data in the current page.