74HC257N,652 Equivalent & Substitute Parts

Part Overview

The 74HC257N,652 is a 4 x 2:1 multiplexer logic integrated circuit manufactured by NXP USA Inc. in a 16-DIP through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74HC257 series provides single-supply operation across a 2V to 6V range with symmetrical output current characteristics, making it suitable for digital signal routing and selection applications in legacy and new designs requiring compatible alternatives.

Substiute Parts

74HC257N,652

NXP USA Inc.In Stock: 97174HC257N,652 Datasheet

Current PartRFQ

CD74HC257E

Harris CorporationIn Stock: 1930CD74HC257E Datasheet

MFR RecommendedRFQ

SN74HC257N

Texas InstrumentsIn Stock: 2567SN74HC257N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HC257N,652 is determined by strict equivalence across the following critical parameters:

• Multiplexer circuit configuration (4 x 2:1)
• Output current specifications (7.8mA symmetrical)
• Supply voltage range (2V ~ 6V minimum overlap)
• Package form factor (16-DIP through-hole)
• Base product number (74HC257 series)

The identified substitute parts CD74HC257E and SN74HC257N meet these core electrical and mechanical requirements. Variations in operating temperature range, product status, and compliance certifications are secondary considerations that do not affect functional substitutability within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring the 74HC257N,652, the following selection criteria apply:

SN74HC257N (Texas Instruments) is the primary substitute option. This part maintains full electrical equivalence, operates within the required voltage and current specifications, and carries active product status with ROHS3 compliance. The operating temperature range of -40°C to 85°C covers standard industrial applications; designs requiring the full -40°C to 125°C range should evaluate thermal requirements against actual operating conditions.

CD74HC257E (Harris Corporation) provides electrical equivalence and extended temperature coverage (-55°C to 125°C) but carries obsolete product status and RoHS non-compliance. This option is suitable only for legacy system maintenance where RoHS compliance is not a procurement requirement and component availability from existing inventory is confirmed.

Both substitutes are mechanically and electrically compatible with the original 74HC257N,652 within the specified parameter envelope. Selection should prioritize product availability, compliance requirements, and long-term supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC257E and SN74HC257N be used interchangeably with the 74HC257N,652?

A: Yes, both parts are functionally equivalent within the specified electrical parameters (4 x 2:1 multiplexer configuration, 7.8mA output current, 2V ~ 6V supply range, 16-DIP package). Differences in operating temperature range and product status do not affect substitutability for standard applications.

Q: What is the significance of the operating temperature range differences?

A: The 74HC257N,652 and SN74HC257N specify -40°C to 85°C or -40°C to 125°C respectively. The CD74HC257E extends to -55°C. For applications operating within -40°C to 85°C, all three parts are suitable. Applications requiring operation above 85°C should use the 74HC257N,652 or CD74HC257E.

Q: Does RoHS compliance affect substitutability?

A: RoHS compliance is a regulatory and procurement requirement, not a functional parameter. The ROHS3-compliant SN74HC257N and 74HC257N,652 are preferred for new designs and regulated markets. The RoHS non-compliant CD74HC257E is restricted to legacy applications where compliance exemptions apply.

Q: Are there package or pinout differences between these parts?

A: No. All three parts use the 16-DIP (0.300", 7.62mm) through-hole package with identical pinout and mechanical dimensions, ensuring direct board-level substitution.

Q: Why is the 74HC257N,652 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production. Substitute parts with active or obsolete status provide equivalent functionality. The SN74HC257N maintains active status, making it the recommended long-term alternative for new procurement.