SN74AHCT157D

Signal Switches, Multiplexers, Decoders Overview

The SN74AHCT157D is a quadruple 2-line to 1-line data selector/multiplexer manufactured by Texas Instruments. It features four independent channels, each capable of selecting one of two data inputs (A or B) based on the state of the select input. The device operates with a supply voltage range of 4.5V to 5.5V and utilizes HCT CMOS technology for compatibility with TTL logic levels. It includes an output enable input that controls all outputs simultaneously, allowing for bus-oriented applications.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides four independent 2-to-1 multiplexing channels within a single package
• Features high-speed CMOS technology ensuring low power consumption and fast switching speeds
• Includes a common output enable input to control all channel outputs simultaneously
• Compatible with standard TTL logic input levels due to HCT design specifications

Signal Switches, Multiplexers, Decoders Applications

• Data routing in digital systems requiring multiple signal paths
• Bus-oriented architectures where shared data lines are utilized
• Address decoding circuits for memory or peripheral selection
• General-purpose multiplexing in industrial control equipment

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'D' indicates the SOIC-16 package variant when sourcing. Confirm the operating temperature range matches your environmental requirements. Ensure supply voltage aligns with the 4.5V to 5.5V specification. Check for automotive qualification if used in vehicle electronics, as standard versions may differ from Q1 variants.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when interfacing with TTL-compatible logic families while requiring CMOS performance benefits. Consider the SN74AHCT series for improved noise immunity compared to older LS counterparts. Evaluate pin count and package size constraints against alternative multiplexers. Verify input voltage thresholds meet system logic level standards before integration.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the Texas Instruments SN74AHCT family of high-speed CMOS logic devices. The AHCT series combines the speed of advanced CMOS with TTL-compatible inputs. The 157 designation specifically refers to the quadruple 2-input multiplexer function. This family is widely used in general-purpose digital logic applications requiring reliable signal selection.

Signal Switches, Multiplexers, Decoders FAQ

What is the function of the output enable input?

The output enable input controls all four channels simultaneously. When activated, it places the outputs in a high-impedance state, isolating them from the circuit.

Is this device suitable for automotive applications?

The standard SN74AHCT157D is not automotive qualified. For automotive use, consider the SN74AHCT157-Q1 variant which meets AEC-Q100 standards.