CAT24C21WI-GT3

Memory IC Overview

The CAT24C21WI-GT3 is a 1-kbit (128 x 8) serial EEPROM manufactured by onsemi. It utilizes an I2C interface with a maximum clock frequency of 400 kHz and features a 1 µs access time. The device operates within a supply voltage range of 2.5 V to 5.5 V and supports surface-mount installation in an 8-SOIC package. It offers a data retention period of 100 years and functions across a temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports standard and fast-mode I2C communication protocols for reliable serial data transfer.
• Provides non-volatile memory storage with long-term data retention capabilities.
• Includes write protection functionality to safeguard stored information against unintended modification.

Memory IC Applications

• Consumer electronics requiring small-scale persistent data storage
• Industrial control systems needing configuration parameter retention
• Automotive modules storing calibration or identification data

Memory IC Procurement Notes

Verify the specific suffix GT3 indicates tape-and-reel packaging when sourcing components. Confirm that the 8-SOIC package dimensions align with PCB footprint requirements. Check current availability status as this part may be subject to end-of-life notices or discontinuation, necessitating alternative sourcing strategies for production continuity.

Memory IC Selection Notes

Select this component for applications requiring low pin count and simple two-wire interface connectivity. Ensure the system voltage falls within the 2.5 V to 5.5 V operating range. Consider the 128-byte capacity sufficient for small datasets; larger memories require higher-density variants within the same family.

Memory IC Part Context

This device belongs to the CAT24C series of serial EEPROMs from onsemi. It shares architectural similarities with other members like the CAT24C32 and CAT24C64, differing primarily in storage density. The SOIC-8 package allows for easy integration into compact electronic designs compared to through-hole alternatives.

Memory IC Replacement Considerations

Direct substitutes include other 1-kbit I2C EEPROMs from different manufacturers such as Microchip's 24AA01E48 or STMicroelectronics' M24C01. Verify compatibility regarding I2C address bits and voltage levels before substitution.