74FCT843BSC

Latches Overview

The National Semiconductor 74FCT843BSC is a D-type transparent latch within the FCT logic series. It features one functional channel with nine bits, providing true, non-inverted outputs. The device utilizes CMOS technology and offers tri-state output capability for bus interfacing. It is housed in a 24-pin SOIC package (0.295 inch width). Key electrical characteristics include a propagation delay of 6.8 ns at 5 V and a supply voltage range of 4.75 V to 5.25 V. The component operates within a temperature range of 0 °C to +70 °C.

Latches Feature Summary

• D-type transparent latch architecture with single-channel operation
• Tri-state outputs for effective bus line management
• Non-inverting signal path ensuring true output polarity

Latches Applications

• Parallel data storage in digital systems
• Bus interface buffering applications
• Temporary data holding in microprocessor-based designs

Latches Procurement Notes

Verify the manufacturer origin carefully, as National Semiconductor assets are managed by Texas Instruments. Confirm the specific suffix 'BSC' corresponds to the 24-SOIC package variant. Ensure compatibility with existing board layouts requiring this specific footprint and pin configuration before procurement.

Latches Selection Notes

Select this component when a nine-bit transparent latch with tri-state control is required. It serves as an alternative to other FCT series latches like the 74FCT374. Consider the 6.8 ns propagation delay and 5 V operating voltage constraints. Verify that the SOIC-24 package fits the mechanical design requirements.

Latches Part Context

This part belongs to the FCT (Fast CMOS) family, designed for high-speed performance with standard CMOS compatibility. It functions as a level-sensitive latch rather than a clocked flip-flop, allowing data to pass through while the enable signal is active. This distinguishes it from edge-triggered devices in similar packages.

Latches Replacement Considerations

The CD74FCT843AM from Texas Instruments is a confirmed substitute offering identical logical functionality and pinout compatibility within the same FCT series specifications.