74HCT42N,652 Equivalent & Substitute Parts

Part Overview

The 74HCT42N,652 is a 1 x 4:10 decoder logic integrated circuit manufactured by NXP USA Inc. in a 16-DIP package. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations. The decoder function remains consistent across compatible alternatives, provided electrical and mechanical parameters align within specified tolerances.

Substiute Parts

74HCT42N,652

NXP USA Inc.In Stock: 112274HCT42N,652 Datasheet

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CD74HCT42E

Texas InstrumentsIn Stock: 1489CD74HCT42E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HCT42N,652 is determined by the following critical parameters:

• Decoder Circuit Configuration: Must be 1 x 4:10 to maintain functional equivalence
• Output Current Specifications: Must support 4mA high and 4mA low output current
• Supply Voltage Range: Must operate within 4.5V to 5.5V single supply specification
• Package and Pinout: Must use 16-DIP (0.300", 7.62mm) through-hole package for mechanical compatibility
• Series Compatibility: 74HCT series logic ensures TTL-compatible switching characteristics

The CD74HCT42E from Texas Instruments meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

The CD74HCT42E is a direct functional substitute for the 74HCT42N,652. Selection of the Texas Instruments alternative is supported by:

• Active Product Status: The CD74HCT42E maintains active manufacturing status, ensuring long-term availability and supply chain reliability
• Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements
• Electrical Equivalence: All critical electrical parameters—decoder configuration, output current, and supply voltage—are identical
• Mechanical Compatibility: 16-DIP through-hole package ensures direct board-level substitution without layout modification
• Extended Temperature Range: The CD74HCT42E supports -55°C to 125°C operation, providing broader environmental tolerance than the original part

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT42E replace the 74HCT42N,652 in existing designs?

A: Yes. The CD74HCT42E is electrically and mechanically equivalent. Both parts share identical decoder configuration (1 x 4:10), output current (4mA/4mA), supply voltage (4.5V–5.5V), and 16-DIP package specifications. Direct substitution is supported without circuit modification.

Q: What is the primary reason for substitution?

A: The 74HCT42N,652 is classified as obsolete. The CD74HCT42E, manufactured by Texas Instruments, is actively produced and provides equivalent functionality with improved long-term availability.

Q: Are there differences in operating temperature ranges?

A: The CD74HCT42E supports -55°C to 125°C, while the original part operates from -40°C to 125°C. The Texas Instruments part provides extended low-temperature capability, making it suitable for a broader range of environmental conditions.

Q: Do both parts require the same PCB footprint?

A: Yes. Both use the 16-DIP (0.300", 7.62mm) through-hole package. No PCB layout changes are necessary for substitution.

Q: Are compliance certifications equivalent?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronics manufacturing and distribution.