24AA01H-I/SN

Memory IC Overview

The Microchip Technology 24AA01H-I/SN is a 1 Kbit (128 x 8) serial EEPROM featuring an I²C-compatible 2-wire interface. It operates on a single supply voltage ranging from 1.7V to 5.5V, supporting clock frequencies up to 400 kHz at VCC ≥ 2.5V and 100 kHz below that threshold. The device includes hardware write-protect functionality for the upper half of the memory array (addresses 40h-7Fh). It offers high endurance exceeding one million erase/write cycles and data retention greater than 200 years.

Memory IC Feature Summary

• Hardware write-protect capability for half-array protection
• Low-power CMOS technology with standby current as low as 1 μA
• Schmitt trigger inputs and output slope control for noise suppression

Memory IC Applications

• Smart cards and security tokens
• Portable battery-powered devices
• Industrial process controls
• Consumer electronics

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the Industrial temperature range (-40°C to +85°C) and 'SN' denotes the 8-lead SOIC package. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors before finalizing procurement specifications.

Memory IC Selection Notes

Select this component when a small footprint 1 Kbit EEPROM is required with half-array write protection. Ensure the application voltage remains above 1.7V for full functionality. Verify that the 400 kHz bus speed requirement is compatible with the system's power supply level, as speeds are limited to 100 kHz below 2.5V.

Memory IC Part Context

This part belongs to the 24AA01H/24LC01BH family of serial EEPROMs. It shares architectural similarities with other members but is distinguished by its 1.7V minimum operating voltage and specific industrial temperature rating. The device utilizes standard I²C protocols for communication.

Memory IC Replacement Considerations

Direct substitutes include the 24LC01BH, though it requires a minimum supply voltage of 2.5V. Other variants within the 24XX01H family may be considered if package or temperature requirements differ.

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 40h-7Fh), while read operations remain unaffected.

What is the maximum clock frequency supported?

The device supports up to 400 kHz when the supply voltage is between 2.5V and 5.5V. At voltages between 1.7V and 2.5V, the maximum clock frequency is limited to 100 kHz.