74F399PC

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74F399PC is a high-speed Quad 2-Port Register housed in a 16-Lead Plastic Dual-In-Line Package (PDIP). It functions as four edge-triggered flip-flops fed by a common Select input that chooses between two 4-bit data sources. The device operates with a supply voltage range of +4.5V to +5.5V and supports an input clock frequency up to 100 MHz at 0°C to +70°C. Propagation delays from Clock to Output range from 3.0 ns to 8.5 ns depending on temperature, with setup times of 3.0 ns for data inputs and 7.5 ns for the select input.

Signal Switches, Multiplexers, Decoders Feature Summary

• Selects four bits of data from either of two independent sources under control of a common Select input
• Transfers selected data to a 4-bit output register synchronous with the rising edge of the Clock input
• Features fully positive edge-triggered operation for predictable data capture

Signal Switches, Multiplexers, Decoders Applications

• Data routing between multiple sources to a single destination
• Synchronous digital systems requiring multi-port register functionality
• High-speed logic circuits utilizing standard TTL-compatible interfaces

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify package integrity upon receipt, as the PDIP housing requires through-hole mounting. Confirm the specific ordering code matches the required lead frame dimensions. Ensure static-safe handling procedures are followed during storage and assembly to prevent electrostatic discharge damage to the internal circuitry.

Signal Switches, Multiplexers, Decoders Selection Notes

Choose this component when a design requires switching between two distinct 4-bit data streams into a synchronized register. The 74F series offers higher speed performance compared to standard 74LS counterparts. Verify that the system clock frequency remains within the specified limits for the intended operating temperature range to ensure reliable timing margins.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74F logic family, known for high-speed performance in standard digital applications. Manufactured originally by Fairchild Semiconductor, it represents a specialized register configuration combining multiplexing and storage capabilities in a single integrated circuit package suitable for complex data path management.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Check datasheets for pinout compatibility before substituting. Ensure replacement devices support the same 16-pin DIP form factor and meet the required propagation delay specifications for the target application environment.