74LCX821WM

Overview

The Fairchild Semiconductor 74LCX821WM is a low-voltage 10-bit D-type flip-flop featuring 3-state outputs, designed for bus-organized system applications. It operates within a supply voltage range of 2.3V to 3.6V and supports 5V tolerant inputs and outputs. The device exhibits a maximum propagation delay of 7.0 ns at VCC = 3.3V and a maximum power-down current of 10 µA. It provides ±24 mA output drive capability at VCC = 3.0V and utilizes advanced CMOS technology for high-speed operation with low power dissipation.

Feature Summary

• Integrates ten D-type flip-flops with 3-state outputs for efficient bus management
• Supports live insertion and withdrawal through power-down high impedance states
• Incorporates patented noise and EMI reduction circuitry for signal integrity
• Ensures robust latch-up performance exceeding 500 mA

Applications

• Bus organized system data storage
• Low voltage logic interfacing
• High-speed digital signal processing
• 5V tolerant input/output environments

Procurement Notes

Verify the specific suffix 'WM' against official onsemi or Fairchild documentation to confirm the SOIC-24 package configuration and tape-and-reel orientation. Ensure the component meets RoHS compliance standards required for your manufacturing process. Cross-reference the manufacturer part number with current datasheets to confirm availability status and any potential obsolescence notices before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring 10-bit parallel data latching with tri-state control in low-voltage environments. It is suitable for applications needing 5V tolerance on both inputs and outputs while operating from 2.5V or 3.3V supplies. Consider its 7.0 ns propagation delay and ±24 mA drive strength for timing-critical bus architectures requiring noise immunity and live insertion support.

Part Context

The 74LCX821 belongs to the LCX series of low-voltage CMOS logic devices produced by Fairchild Semiconductor, now part of onsemi. This series is characterized by high speed and low power consumption, specifically engineered for portable and battery-operated applications. The 74LCX821WM variant specifically denotes the wide-body SOIC package version, maintaining the electrical characteristics of the standard LCX821 family.

Replacement Considerations

Public confirmed substitutes include 74LCX821MTC and 74LCX821MSA. Verify pinout compatibility and package dimensions when replacing the WM variant with these alternatives.