SN74S251N

Signal Switches, Multiplexers, Decoders Overview

The SN74S251N is an 8-input to 1-output multiplexer from the Schottky TTL (74S) series, manufactured by Texas Instruments. It features three-state outputs and is housed in a 16-pin PDIP package. Key electrical parameters include a propagation delay of 12 ns, a maximum power supply current of 62 mA, and a load capacitance of 50 pF. The device operates within a temperature range of 0°C to 70°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides eight selectable data inputs routed to a single output line
• Features three-state outputs for bus-driven applications
• Utilizes Schottky TTL technology for high-speed switching

Signal Switches, Multiplexers, Decoders Applications

• Data routing in communication systems
• Signal selection in digital logic circuits
• Bus structure implementations

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'N' confirms the PDIP-16 through-hole package variant. Confirm the '-25' speed grade if specified in ordering codes, as it denotes the 12 ns propagation delay characteristic. Ensure compatibility with standard 5V TTL logic levels for input and output interfacing requirements.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when high-speed data multiplexing is required using Schottky TTL technology. It is suitable for designs needing three-state output control on shared buses. Consider thermal dissipation limits given the 62 mA maximum supply current during operation at elevated temperatures up to 70°C.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the Texas Instruments 74S series, known for improved speed over standard 74 series logic. The SN74S251 specifically addresses applications requiring fast data selection among multiple sources, serving as a core building block in complex digital signal processing and communication hardware architectures.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Compatible substitutes include other 8:1 multiplexers with three-state outputs such as the SN74LS251 or SN74AS251, though logic family characteristics like speed and power consumption will differ.