MC74ACT158N

Signal Switches, Multiplexers, Decoders Overview

The MC74ACT158N is a high-speed silicon-gate CMOS quad 2-input data selector/multiplexer manufactured by onsemi. It features inverted outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides 24 mA source/sink output current capability and utilizes a 16-pin plastic DIP package with a 0.300-inch width. It functions as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs.

Signal Switches, Multiplexers, Decoders Feature Summary

• Routes two nibbles (A or B) to a single port based on select input
• Provides inverted output form for data presentation
• Maintains identical pinout compatibility with LS/ALS138, HC/HCT138 series

Signal Switches, Multiplexers, Decoders Applications

• Interfacing TTL or NMOS outputs to High Speed CMOS inputs
• Level conversion applications
• Data selection and multiplexing in digital circuits

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the manufacturer designation carefully, as the 'MC' prefix typically indicates Motorola/Freescale/NXP lineage. Confirm that the specific MC74ACT158N variant from onsemi matches your required pinout and electrical specifications against official datasheets before procurement to ensure functional equivalence with legacy designs.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when inverted multiplexer outputs are required for system logic. Ensure the design accommodates the 4.5 V to 5.5 V operating voltage range. Verify that the 16-pin DIP package fits the board layout constraints and that the 24 mA drive strength meets the load requirements of the destination circuitry.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74ACT logic family, designed for high-speed CMOS applications with TTL-compatible input levels. It serves as a direct replacement for older LS/ALS technology in systems requiring faster switching speeds while maintaining backward compatibility with standard logic interfaces.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct pin-compatible substitutes include IN74ACT158N from IK Semicon and KK74ACT158 from KODENSHI_AUK CORP. These alternatives share the same quad 2-input multiplexer functionality and pinout configuration.