SN74HC42NSR

Overview

The SN74HC42NSR is a 4-line to 10-line decoder manufactured by Texas Instruments, belonging to the HC logic family. It features four inputs and ten outputs, housed in a 16-pin SOIC package with a narrow body width of 3.90 mm. The device operates on a single power supply ranging from 2 V to 6 V. Key electrical parameters include a propagation delay of 38 ns and output drive currents of 5.2 mA for both high and low states. It functions within an ambient temperature range of -40°C to +85°C.

Feature Summary

• Performs decoding of four binary input lines into one-of-ten active-low output selections
• Utilizes standard CMOS technology compatible with general-purpose digital systems
• Provides robust output drive capability suitable for interfacing with various loads

Applications

• Address decoding in microprocessor-based memory systems
• Control signal routing in industrial automation equipment
• Data distribution in communication interface circuits

Procurement Notes

Verify the specific suffix 'N' against official manufacturer documentation, as it may denote a non-standard or obsolete variant not currently listed in primary catalogs. Confirm RoHS compliance status and moisture sensitivity level prior to procurement. Ensure the supplier provides traceable origin data matching the exact part number to avoid substitution errors during assembly.

Selection Notes

Select this component when a 4-to-10 decoding function is required within the HC voltage range. Compare performance metrics such as propagation delay and output current against alternative decoders if system timing constraints are tight. Consider package availability and thermal characteristics for PCB layout optimization in dense designs.

Part Context

This decoder belongs to the widely adopted 74HC series of CMOS logic devices. These components are designed for high-speed operation while maintaining low power consumption. The SN74HC42 variant specifically addresses applications requiring multiple distinct output selection signals derived from a compact binary input code.

Replacement Considerations

SN74HC42DR: Surface-mount equivalent in SOIC-16 package. SN74HC42D: Non-reflowable surface-mount version in SOIC-16. SN74HC42N: Through-hole DIP-16 alternative.