74LCX821MSA

Overview

The Fairchild Semiconductor 74LCX821MSA is a low-voltage 10-bit D-type flip-flop featuring 3-state outputs, designed for bus-organized system applications. It operates within a 2.3V to 3.6V supply range and supports 5V tolerant inputs and outputs, enabling direct interfacing with 5V signal environments. Fabricated using advanced CMOS technology, the device achieves high-speed operation with a maximum propagation delay of 7.0 ns at 3.3V while maintaining low power dissipation. The component provides an output drive capability of ±24 mA at VCC = 3.0V and includes power-down high-impedance states.

Feature Summary

• Supports live insertion and withdrawal capabilities
• Implements patented noise and EMI reduction circuitry
• Provides latch-up performance exceeding 500 mA

Applications

• Bus organized system applications
• Low voltage (2.5V or 3.3V) VCC systems
• Interfacing to 5V signal environments

Procurement Notes

Verify the specific manufacturer source, as this component has been produced by both Fairchild Semiconductor and ON Semiconductor. Confirm that the datasheet revision matches the required specifications, particularly regarding the 7.0 ns propagation delay and 5V tolerance characteristics. Ensure the ceramic LCC-28 package variant aligns with the MSA suffix designation before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring 10-bit storage with high-speed data transfer in low-voltage environments. It is suitable for applications needing 5V compatibility without level shifting. Consider the ±24 mA drive strength for driving multiple loads. Verify that the operating temperature range and ESD protection levels meet the environmental requirements of the target application.

Part Context

The 74LCX821 belongs to the LCX logic family, which is characterized by low voltage operation and 5V tolerance. This series utilizes advanced CMOS technology to balance speed and power consumption. The 74LCX821 specifically functions as a D-type flip-flop, providing edge-triggered data storage with tri-state outputs for efficient bus management in digital circuits.

Replacement Considerations

Public confirmed substitute part numbers include 74LCX821, 74LCX821MSA, and 74LCX821MTC.