74ACT399PC

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74ACT399PC is a quad 2-port register implemented as a quad 2-input multiplexer feeding into four edge-triggered flip-flops. It operates within a supply voltage range of 4.5V to 5.5V and features through-hole 16-PDIP packaging. The device supports output currents of 24mA for both high and low states, with a maximum propagation delay of 9ns at 5V with 50pF load. It functions reliably across an operating temperature range of -40°C to 85°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Integrates four independent 2-to-1 multiplexers directly connected to edge-triggered D-type flip-flops for simultaneous data selection and storage.

Signal Switches, Multiplexers, Decoders Applications

• Parallel data routing in digital systems
• Input selection for microprocessor interfaces
• Data path switching in embedded controllers

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'PC' corresponds to the 16-pin PDIP package variant. Confirm RoHS compliance status for current manufacturing lots. Check component availability as legacy parts may be subject to discontinuation or limited stock from authorized distributors. Ensure pinout compatibility with existing PCB layouts before procurement.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a design requires integrated multiplexing and latching functionality in a single package. It is suitable for applications needing fast signal switching with minimal external components. Consider the 16-pin DIP form factor for prototyping or through-hole assembly requirements. Verify logic level compatibility with the system's 5V power rail.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74ACT series of advanced CMOS logic devices, offering speed comparable to TTL but with lower power consumption. The 74ACT399 specifically addresses needs for multi-channel data acquisition where signal routing and temporary storage are required simultaneously. It serves as a logical equivalent to standard quad multiplexer-register combinations.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Check for direct cross-references from other manufacturers such as onsemi or NXP offering identical pinouts and electrical characteristics. Verify that any substitute maintains the same 16-PDIP footprint and ACT logic family specifications to ensure circuit compatibility without redesign.