SN74HC42D Equivalent & Substitute Parts

Part Overview

The SN74HC42D is a 1 x 4:10 decoder logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design requirements and production needs. The decoder function remains consistent across qualified substitutes, provided electrical and mechanical parameters align within specified tolerances.

Substiute Parts

SN74HC42D

Texas InstrumentsIn Stock: 7009SN74HC42D Datasheet

Current PartRFQ

SN74HC42DR

Texas InstrumentsIn Stock: 570030SN74HC42DR Datasheet

DirectRFQ

74HC42D,653

Nexperia USA Inc.In Stock: 1759874HC42D,653 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HC42D is determined by the following critical parameters:

• Decoder function: 1 x 4:10 circuit configuration
• Output current capability: 5.2mA high and low
• Supply voltage range: 2V to 6V minimum compatibility
• Package type: 16-SOIC surface mount form factor
• RoHS and MSL compliance status

Two qualified substitutes meet these criteria with variations in manufacturer, product status, and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

SN74HC42DR is the direct equivalent substitute from Texas Instruments. It maintains identical electrical specifications and operating temperature range (-40°C to 85°C) as the original SN74HC42D. This part is currently active in production with substantial inventory availability. Selection of this substitute preserves design continuity with the original manufacturer.

74HC42D,653 from Nexperia USA Inc. is a qualified upgrade substitute. It provides extended operating temperature range (-40°C to 125°C) while maintaining all other critical electrical and mechanical parameters. This part is active in production. The extended temperature capability may provide additional design margin for applications requiring operation at elevated temperatures.

Both substitutes are ROHS3 compliant and carry MSL 1 rating, meeting environmental and reliability requirements equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can SN74HC42DR be used as a direct replacement for SN74HC42D?

A: Yes. The SN74HC42DR is electrically and mechanically identical to the SN74HC42D. Both parts share the same decoder function, output current specifications, supply voltage range, operating temperature range, and 16-SOIC package configuration. The primary difference is packaging format (Cut Tape & Digi-Reel® versus Tube) and product status (Active versus Discontinued).

Q: What is the advantage of using 74HC42D,653 over SN74HC42DR?

A: The 74HC42D,653 extends the maximum operating temperature to 125°C compared to 85°C for both the original SN74HC42D and SN74HC42DR. All other electrical and mechanical specifications remain identical. Selection depends on application temperature requirements.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 16-SOIC package with identical pinout and mechanical dimensions (0.154", 3.90mm Width). PCB layout and footprint requirements are identical.

Q: Do packaging format differences affect circuit performance?

A: No. Packaging format (Tube, Cut Tape, or Digi-Reel®) affects only handling, storage, and supply chain logistics. Electrical performance and reliability are unaffected by packaging format.

Q: Are all substitutes RoHS and MSL compliant?

A: Yes. All three parts are ROHS3 compliant and carry MSL 1 (Unlimited) rating, meeting environmental and moisture sensitivity requirements.