SN74LS157NG4 Equivalent & Substitute Parts

Part Overview

The SN74LS157NG4 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 and substitute parts necessary for ongoing design support and production requirements. The device functions as a data selector, routing one of two input signals to a single output based on control logic, with applications in signal routing, data selection, and logic circuit design.

Substiute Parts

SN74LS157NG4

Texas InstrumentsIn Stock: 1073SN74LS157NG4 Datasheet

Current PartRFQ

SN74LS158N

Texas InstrumentsIn Stock: 2430SN74LS158N Datasheet

Parametric EquivalentRFQ

SN74LS298N

onsemiIn Stock: 20322SN74LS298N Datasheet

Parametric EquivalentRFQ

SN74LS157N

Texas InstrumentsIn Stock: 13698SN74LS157N Datasheet

MFR RecommendedRFQ

SN74LS399N

Texas InstrumentsIn Stock: 2735SN74LS399N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74LS157NG4 is determined by strict equivalence across the following critical parameters:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Output current specifications: 400µA (high), 8mA (low)
• Supply voltage range: 4.75V ~ 5.25V
• Operating temperature range: 0°C ~ 70°C
• Package type: 16-DIP (0.300", 7.62mm)
• Mounting method: Through Hole

All substitute parts listed maintain identical electrical and mechanical specifications within these parameters. Differences in product status, packaging format (tube vs. other), and compliance certifications are noted but do not affect functional interchangeability in applications requiring these core specifications.

Parameter Comparison

Engineering Selection Recommendations

SN74LS157N is the manufacturer-recommended substitute. This part is produced by Texas Instruments, maintains active product status, and carries ROHS3 compliance certification. It is functionally identical to the SN74LS157NG4 across all electrical and mechanical parameters.

SN74LS158N is a parametric equivalent with active product status and ROHS3 compliance. Texas Instruments manufactures this part, ensuring consistent quality and availability.

SN74LS399N is a parametric equivalent with active product status and ROHS3 compliance, also manufactured by Texas Instruments. This part provides an alternative source for continued supply.

SN74LS298N is a parametric equivalent manufactured by onsemi. This part carries obsolete product status and does not meet ROHS3 compliance requirements. Selection of this part should be limited to applications where RoHS compliance is not mandated and long-term availability is not a concern.

For new designs and production requiring regulatory compliance, SN74LS157N, SN74LS158N, or SN74LS399N are preferred selections due to active status and ROHS3 certification.

Frequently Asked Questions (FAQ)

Q: Can SN74LS157N be used as a direct replacement for SN74LS157NG4?

A: Yes. Both parts share identical electrical specifications (4 x 2:1 multiplexer configuration, 400µA/8mA output current, 4.75V–5.25V supply voltage, 0°C–70°C operating temperature) and mechanical specifications (16-DIP through-hole package). The primary difference is product status; SN74LS157N is active while SN74LS157NG4 is discontinued.

Q: What is the difference between SN74LS157N and SN74LS158N?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The difference lies in the base product number (74LS157 vs. 74LS158), which reflects different internal logic designs. Both are suitable substitutes for the SN74LS157NG4 in applications requiring a 4 x 2:1 multiplexer with the specified parameters.

Q: Is SN74LS298N suitable for new production?

A: SN74LS298N is a parametric equivalent but carries obsolete product status and does not meet ROHS3 compliance. It should not be selected for new production designs where regulatory compliance or long-term supply assurance is required.

Q: Are all substitute parts available in the same packaging format?

A: The substitute parts are available in tube packaging, while the original SN74LS157NG4 packaging format is not specified in the provided data. All parts maintain the same 16-DIP (0.300", 7.62mm) physical package, ensuring mechanical compatibility in through-hole PCB applications.

Q: What compliance certifications apply to these substitute parts?

A: SN74LS157N, SN74LS158N, and SN74LS399N are ROHS3 compliant. SN74LS298N is RoHS non-compliant. All parts are EAR99 classified and REACH unaffected.