N74F157AD Equivalent & Substitute Parts

Part Overview

The N74F157AD is a 4 x 2:1 multiplexer logic integrated circuit manufactured by NXP USA Inc. in a 16-SOIC surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The N74F157AD performs digital signal routing and selection functions in logic applications requiring multiplexing of four independent 2:1 channels.

Substiute Parts

N74F157AD,623

NXP USA Inc.In Stock: 892N74F157AD,623 Datasheet

Current PartRFQ

SN74F157AD

Texas InstrumentsIn Stock: 3162SN74F157AD Datasheet

MFR RecommendedRFQ

SN74F157ADR

Texas InstrumentsIn Stock: 2277SN74F157ADR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the N74F157AD is determined by strict equivalence across electrical and mechanical parameters. The following criteria establish valid substitutes:

• Identical circuit configuration: 4 x 2:1 multiplexer topology
• Matching output current specifications: 1 mA high, 20 mA low
• Identical supply voltage range: 4.5V to 5.5V
• Identical operating temperature range: 0°C to 70°C
• Compatible package: 16-SOIC form factor with 0.154" width (3.90mm)
• Surface mount mounting type
• Compliance with ROHS3 and REACH requirements

The substitute parts identified below meet all these criteria and are direct functional and pin-compatible replacements for the N74F157AD.

Parameter Comparison

Engineering Selection Recommendations

The SN74F157ADR manufactured by Texas Instruments is the primary substitute for the obsolete N74F157AD. This part carries Active product status, ensuring long-term availability and supply chain continuity. The SN74F157ADR is supplied in Tape & Reel packaging, which is standard for high-volume production environments.

The SN74F157AD (Tube packaging) represents an alternative substitute with Last Time Buy status. This part remains available but has limited production life. Selection between SN74F157AD and SN74F157ADR should be based on packaging requirements and procurement timelines.

All three parts maintain identical electrical specifications, pin compatibility, and compliance certifications. The choice between substitutes is determined by product lifecycle status and packaging format availability rather than functional or electrical differences.

Frequently Asked Questions (FAQ)

Q: Are the SN74F157AD and SN74F157ADR pin-compatible with the N74F157AD?

A: Yes. All three parts share identical pin configurations, electrical specifications, and 16-SOIC package dimensions. Direct substitution is possible without circuit modification.

Q: What is the difference between SN74F157AD and SN74F157ADR?

A: The primary difference is packaging format. SN74F157AD is supplied in Tube packaging, while SN74F157ADR is supplied in Tape & Reel format. Electrical specifications and performance are identical. Tape & Reel packaging is preferred for automated assembly processes.

Q: Why is the N74F157AD obsolete?

A: The N74F157AD has reached end-of-life status with NXP USA Inc. Texas Instruments continues to manufacture functionally equivalent parts under the SN74F157 series, providing continuity for applications requiring 4 x 2:1 multiplexer logic.

Q: Can I use SN74F157ADR in existing designs that specify N74F157AD?

A: Yes. The SN74F157ADR is a direct functional and electrical equivalent. No design changes are required. Verify that your PCB assembly process supports Tape & Reel packaging if switching from the original Tube format.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The N74F157AD, SN74F157AD, and SN74F157ADR are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What supply voltage range do these multiplexers support?

A: All parts operate within a 4.5V to 5.5V supply voltage range. This specification is identical across the N74F157AD and its Texas Instruments substitutes.