SN74ALS158NG4 Equivalent & Substitute Parts

Part Overview

The SN74ALS158NG4 is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 16-DIP package. This part is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design work and component procurement. The multiplexer function selects one of two input signals and routes it to a single output, with four independent multiplexer circuits integrated on a single chip. Equivalent parts maintain identical electrical performance and mechanical compatibility while offering active product status and improved availability.

Substiute Parts

SN74ALS158NG4

Texas InstrumentsIn Stock: 1282SN74ALS158NG4 Datasheet

Current PartRFQ

SN74ALS158N

Texas InstrumentsIn Stock: 2356SN74ALS158N Datasheet

MFR RecommendedRFQ

SN74ALS157AN

Texas InstrumentsIn Stock: 1611SN74ALS157AN Datasheet

Parametric EquivalentRFQ

SN74AS157N

Texas InstrumentsIn Stock: 2119SN74AS157N Datasheet

Parametric EquivalentRFQ

SN74AS158N

Texas InstrumentsIn Stock: 2065SN74AS158N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74ALS158NG4 is determined by strict equivalence across the following critical parameters: multiplexer circuit configuration (4 x 2:1), output current specifications (400µA high, 8mA low), supply voltage range (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C), and physical package format (16-DIP). All substitute parts listed maintain identical electrical characteristics and mechanical compatibility. Substitutes are grouped by product status and series designation. The primary substitute SN74ALS158N is the direct equivalent with active product status. Secondary parametric equivalents SN74ALS157AN, SN74AS157N, and SN74AS158N share all critical electrical and mechanical parameters while differing in series designation (74ALS versus 74AS logic families) and base product numbering.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the discontinued SN74ALS158NG4, select SN74ALS158N. This part maintains identical series designation, electrical specifications, and package format while offering active product status and higher inventory availability (2330 pcs in stock). Both parts are ROHS3 compliant and REACH unaffected, ensuring regulatory compliance continuity.

The parametric equivalents SN74ALS157AN, SN74AS157N, and SN74AS158N are suitable alternatives when SN74ALS158N is unavailable. All four substitute parts meet the electrical and mechanical requirements of the original part. The 74AS series variants (SN74AS157N, SN74AS158N) represent a different logic family within the same functional class and maintain full parameter compatibility. Selection among these alternatives should be based on inventory availability and procurement lead times, as all parts are active and fully compliant with applicable standards.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS158N directly replace SN74ALS158NG4 in existing designs?

A: Yes. SN74ALS158N is the direct equivalent with identical electrical specifications, output current ratings, supply voltage range, operating temperature range, and 16-DIP package format. The only difference is product status (active versus discontinued) and packaging designation (Tube versus standard).

Q: What is the difference between 74ALS and 74AS series multiplexers?

A: Both series maintain the same electrical parameters specified for this application: 4 x 2:1 circuit configuration, 400µA output high current, 8mA output low current, 4.5V ~ 5.5V supply voltage, and 0°C ~ 70°C operating temperature. The series designation indicates different logic family implementations by Texas Instruments. Both are functionally equivalent for this multiplexer application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (SN74ALS158N, SN74ALS157AN, SN74AS157N, SN74AS158N) are ROHS3 compliant and REACH unaffected, matching the compliance status of the original SN74ALS158NG4.

Q: What is the physical package compatibility?

A: All parts use the 16-DIP (0.300", 7.62mm) package format with 16-PDIP supplier device package designation. Through-hole mounting is identical across all parts, ensuring direct PCB compatibility without layout modifications.

Q: Which substitute part has the best availability?

A: SN74ALS158N offers the highest inventory level at 2330 pcs in stock, followed by SN74AS157N (2072 pcs), SN74AS158N (1968 pcs), and SN74ALS157AN (1547 pcs). All parts are currently active and available for procurement.