SN74HC257NG4 Equivalent & Substitute Parts

Part Overview

The SN74HC257NG4 is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in the 74HC series. This component is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design and production requirements. The part functions as a data selector, routing one of two input signals to a single output based on control logic, with applications in signal switching and data multiplexing circuits.

Substiute Parts

SN74HC257NG4

Texas InstrumentsIn Stock: 1129SN74HC257NG4 Datasheet

Current PartRFQ

SN74HC258N

Texas InstrumentsIn Stock: 1272SN74HC258N Datasheet

Parametric EquivalentRFQ

SN74HC257N

Texas InstrumentsIn Stock: 2567SN74HC257N Datasheet

MFR RecommendedRFQ

SN74HC157N

Texas InstrumentsIn Stock: 3600SN74HC157N Datasheet

Parametric EquivalentRFQ

SN74HC158N

Texas InstrumentsIn Stock: 2270SN74HC158N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74HC257NG4 is determined by strict equivalence across the following parameters: multiplexer circuit configuration (4 x 2:1), output current specifications (7.8mA high and low), supply voltage range (2V ~ 6V), operating temperature range (-40°C ~ 85°C), package type (16-DIP), and compliance certifications (ROHS3, REACH Unaffected). All substitute parts listed maintain identical electrical and mechanical specifications, ensuring direct functional replacement in existing circuit designs. The primary distinction among substitutes is product status and packaging format (tube vs. other formats).

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts—SN74HC258N, SN74HC257N, SN74HC157N, and SN74HC158N—are active products from Texas Instruments and maintain full compliance with ROHS3 and REACH requirements. The SN74HC257N is the manufacturer-recommended substitute, offering the highest inventory availability (2460 pcs) and direct functional equivalence. SN74HC157N provides the largest stock position (3584 pcs), while SN74HC258N and SN74HC158N offer alternative base product numbers with comparable availability. All substitutes are supplied in tube packaging and are suitable for direct replacement in applications requiring 4 x 2:1 multiplexer functionality within the specified electrical and thermal parameters.

Frequently Asked Questions (FAQ)

Q: Can SN74HC257N directly replace SN74HC257NG4 in existing designs? A: Yes. Both parts share identical electrical specifications, package type (16-DIP), and compliance certifications. The primary difference is product status; SN74HC257N is active while SN74HC257NG4 is discontinued.

Q: What distinguishes SN74HC257N, SN74HC258N, SN74HC157N, and SN74HC158N from each other? A: These parts are functionally equivalent multiplexers with identical circuit configurations (4 x 2:1), output current ratings, supply voltage ranges, and operating temperatures. The differences lie in their base product numbers and internal logic configurations, which do not affect substitution compatibility for standard 4 x 2:1 multiplexer applications.

Q: Are all substitute parts available in the same package format? A: All substitute parts are supplied in 16-PDIP (16-DIP) through-hole packages with 0.300" (7.62mm) spacing, ensuring mechanical compatibility with existing PCB layouts.

Q: Do the substitute parts meet the same compliance requirements? A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance profile of the original SN74HC257NG4.

Q: Which substitute part offers the best availability? A: SN74HC157N currently has the highest inventory level at 3584 pcs. SN74HC257N, the manufacturer-recommended substitute, has 2460 pcs in stock.