SN74HC42D

Overview

The SN74HC42D is a single 4-line to 10-line decoder manufactured by Texas Instruments, belonging to the HC logic family. It operates within a supply voltage range of 2 V to 6 V and features a propagation delay of 38 ns. The device is housed in a 16-SOIC package with narrow body dimensions. It supports surface mount installation and functions reliably across an operating temperature range from -40°C to +85°C.

Feature Summary

• Converts four binary input lines into one of ten mutually exclusive active-low outputs
• Utilizes high-speed CMOS technology for low power consumption and noise immunity
• Provides standardized logic levels compatible with various digital systems

Applications

• Address decoding in microprocessor-based systems
• Memory chip selection circuits
• Control signal routing in industrial automation

Procurement Notes

Verify the specific suffix 'D' confirms the SOIC-16 narrow package variant rather than other packaging options like DIP or tape-and-reel formats. Confirm RoHS compliance status and moisture sensitivity level requirements against your assembly process specifications before finalizing procurement orders.

Selection Notes

Select this component when a 4-to-10 decoding function is required in space-constrained designs utilizing surface mount technology. Ensure the system voltage remains within the 2 V to 6 V operational window and that the thermal environment stays between -40°C and +85°C for reliable performance.

Part Context

This part belongs to the SN74HC42 series of decimal decoders produced by Texas Instruments. It serves as a standard logic interface component for converting binary coded decimal inputs into distinct output lines, commonly used in legacy and modern digital circuit architectures requiring simple address mapping.

Replacement Considerations

SN74HC42DR (Tape & Reel version), SN74HC42N (Through-Hole DIP version)