SN74HC157ANS Equivalent & Substitute Parts

Part Overview

The SN74HC157ANS is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments. This part is currently in Last Time Buy status, indicating it is being phased out. The SN74HC157ANS operates as a data selector/multiplexer, routing one of two input signals to a single output based on control logic. Due to its Last Time Buy status, identifying functionally equivalent substitute parts is essential for design continuity and long-term component availability.

Substiute Parts

SN74HC157ANS

Texas InstrumentsIn Stock: 1182SN74HC157ANS Datasheet

Current PartRFQ

SN74HC157ANSR

Texas InstrumentsIn Stock: 3120SN74HC157ANSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74HC157ANS is determined by the following critical parameters:

• Circuit Configuration: 4 x 2:1 multiplexer topology
• Packaging: 16-SOIC surface mount package
• Compliance: ROHS3 and REACH status alignment
• Electrical Characteristics: Voltage supply range (2V ~ 6V), output current ratings, and operating temperature range (-40°C ~ 85°C)
• Manufacturer Support: Active product status ensures long-term availability and supply chain stability

The primary substitute part, SN74HC157ANSR, maintains identical circuit functionality and packaging while offering Active product status, making it the direct replacement for the Last Time Buy SN74HC157ANS.

Parameter Comparison

Engineering Selection Recommendations

The SN74HC157ANSR is the direct functional equivalent of the SN74HC157ANS. Both parts share identical circuit topology (4 x 2:1 multiplexer), package form factor (16-SOIC), and compliance certifications (ROHS3, REACH Unaffected, MSL 1). The primary distinction is product status: the SN74HC157ANSR maintains Active status, ensuring continued availability and manufacturing support, whereas the SN74HC157ANS is designated Last Time Buy.

For new designs or component replenishment, the SN74HC157ANSR is the appropriate selection. For existing inventory management of the SN74HC157ANS, the SN74HC157ANSR provides pin-compatible and functionally equivalent replacement capability without design modification.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC157ANSR directly replace the SN74HC157ANS in existing designs?

A: Yes. Both parts are manufactured by Texas Instruments, share the 4 x 2:1 multiplexer circuit configuration, and use identical 16-SOIC packaging. Pin compatibility and functional equivalence are maintained.

Q: What is the significance of the Last Time Buy status on the SN74HC157ANS?

A: Last Time Buy status indicates the manufacturer is discontinuing production. This designation signals the final opportunity to purchase the part before it becomes unavailable. Transition to the Active-status SN74HC157ANSR is recommended for long-term supply chain stability.

Q: Are there compliance differences between the SN74HC157ANS and SN74HC157ANSR?

A: No. Both parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating.

Q: Does the package type differ between these parts?

A: No. Both parts use the 16-SOIC (0.209", 5.30mm Width) surface mount package, ensuring mechanical and electrical compatibility on printed circuit boards.

Q: What is the operating temperature range for these multiplexer parts?

A: The SN74HC157ANSR operates across -40°C to 85°C. This range is standard for industrial-grade logic circuits and supports applications in automotive, industrial, and consumer electronics environments.