74AHCT257D,118

Signal Switches, Multiplexers, Decoders Overview

The Nexperia 74AHCT257D,118 is a quad 2-input multiplexer with 3-state outputs housed in an SO16 (SOT109-1) plastic small outline package. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL input levels. The device includes overvoltage tolerant inputs up to 5.5 V, Schmitt-trigger action on all inputs, and balanced propagation delays. It supports ambient temperatures from -40 °C to +125 °C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad 2-input multiplexer architecture with non-inverting data paths
• TTL-compatible input switching levels for direct interface with logic families
• Overvoltage tolerant inputs allowing operation in mixed voltage environments
• Schmitt-trigger action at all inputs for improved noise immunity

Signal Switches, Multiplexers, Decoders Applications

• Data routing in mixed voltage systems
• Signal selection circuits requiring high noise immunity
• Bus-oriented transmission applications

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature range. Ensure that the active LOW output enable requirement aligns with system control logic. Confirm RoHS compliance status through official Nexperia channels prior to finalizing procurement specifications.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when TTL-level compatibility is required alongside CMOS performance characteristics. The AHCT series provides balanced propagation delays suitable for high-speed digital signal processing. Verify that the 3-state output configuration meets bus isolation requirements for the intended application design.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the Nexperia 74AHCT family, which combines CMOS low power dissipation with TTL input levels. The 74AHCT257 variant specifically implements a quad multiplexer function. It is distinct from the 74AHC257 by its input voltage thresholds, making it suitable for interfacing directly with Transistor-Transistor Logic sources without additional level shifting.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74AHC257D,118 serves as a functional alternative but requires verification of input voltage threshold compatibility. Other manufacturers may offer equivalent quad 2-input multiplexers; ensure pinout and electrical specifications match before substitution.