SN54LS157J Equivalent & Substitute Parts

Part Overview

The SN54LS157J is a QUADRUPLE 2-LINE TO 1-LINE DATA selector/multiplexer manufactured by Texas Instruments, classified as a Logic component. This 4 x 2:1 data selector is designed for applications requiring high-speed data routing and selection across multiple input lines. The part is currently Active in product status with 1,298 units in stock. Finding equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate different packaging or operational requirements across various application environments.

Substiute Parts

SN54LS157J

Texas InstrumentsIn Stock: 1317SN54LS157J Datasheet

Current PartRFQ

SN74LS157N

Texas InstrumentsIn Stock: 13698SN74LS157N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN54LS157J is determined by the following critical parameters:

Functional Equivalence: Both the main part and substitute must maintain the same circuit configuration (4 x 2:1 multiplexer) and logic function as a data selector.

Electrical Compatibility: Voltage supply range, output current specifications, and logic family (LS-series) must support the intended application. The SN54LS157J operates across -55°C to 125°C with a supply voltage of 4.5V to 5.5V.

Package Compatibility: The 16-CDIP and 16-DIP packages are mechanically compatible for through-hole mounting applications, with identical pin counts and spacing (0.300", 7.62mm).

Compliance and Status: Both parts must maintain Active product status and ROHS3 compliance to ensure long-term availability and regulatory adherence.

The SN74LS157N qualifies as a direct substitute based on these parameters, with the primary distinction being its commercial-grade operating temperature range (0°C to 70°C) versus the military-grade range of the SN54LS157J.

Parameter Comparison

Engineering Selection Recommendations

For Military and Extended Temperature Applications: The SN54LS157J is the appropriate selection when operating temperature requirements extend beyond 0°C to 70°C, particularly for applications requiring the -55°C to 125°C range. This part maintains Active product status and ROHS3 compliance.

For Commercial-Grade Applications: The SN74LS157N serves as a suitable substitute for applications operating within the 0°C to 70°C temperature range. Both parts share identical logic functionality, package footprint, and compliance certifications. The SN74LS157N offers higher output low current (8mA versus 4mA) and a narrower supply voltage window (4.75V to 5.25V versus 4.5V to 5.5V).

Supply Chain Considerations: The SN74LS157N maintains significantly higher inventory availability (13,652 units) compared to the SN54LS157J (1,298 units), making it preferable for high-volume production when temperature specifications permit.

Compliance Assurance: Both parts maintain Active product status and ROHS3 compliance, ensuring regulatory adherence and long-term manufacturability.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS157N replace the SN54LS157J in all applications?

A: The SN74LS157N is functionally equivalent for applications operating within 0°C to 70°C. Applications requiring extended temperature operation (-55°C to 125°C) must use the SN54LS157J. Verify your operating temperature requirements before substitution.

Q: What is the difference between the 16-CDIP and 16-DIP packages?

A: Both packages are mechanically compatible for through-hole mounting with identical pin spacing (0.300", 7.62mm) and pin count. CDIP denotes ceramic dual in-line package, while DIP denotes plastic dual in-line package. Pin-to-pin compatibility is maintained.

Q: Are there voltage supply differences between these parts?

A: The SN54LS157J operates at 4.5V to 5.5V, while the SN74LS157N operates at 4.75V to 5.25V. The SN54LS157J provides a wider supply voltage tolerance. Verify your power supply specifications before substitution.

Q: What is the significance of the output current difference (4mA versus 8mA)?

A: The SN74LS157N provides higher output low current (8mA) compared to the SN54LS157J (4mA). This difference affects load-driving capability. Applications with higher current demands may benefit from the SN74LS157N, while applications with lower current requirements are compatible with either part.

Q: Are both parts ROHS3 compliant?

A: Yes, both the SN54LS157J and SN74LS157N are ROHS3 compliant, meeting regulatory requirements for hazardous substance restrictions.