74AC157PC Equivalent & Substitute Parts

Part Overview

The 74AC157PC is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in a 16-DIP package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74AC157 series provides single-supply multiplexing functionality suitable for digital logic applications requiring channel selection and data routing.

Substiute Parts

74AC157PC

onsemiIn Stock: 66974AC157PC Datasheet

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CD74AC157E

Texas InstrumentsIn Stock: 2016CD74AC157E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74AC157PC is determined by the following critical parameters:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Package type: 16-DIP (0.300", 7.62mm) through-hole mounting
• Output current capability: 24mA high and low
• Single-supply voltage operation
• Base product series: 74AC157

The CD74AC157E from Texas Instruments qualifies as a direct substitute based on matching circuit configuration, identical package specification, equivalent output current ratings, and compatible voltage supply architecture. Substitution is valid when the substitute part's electrical operating ranges encompass or match the application requirements of the original component.

Parameter Comparison

Engineering Selection Recommendations

The CD74AC157E is a qualified substitute for the 74AC157PC. The substitute part maintains active product status with Texas Instruments, ensuring long-term availability and supply chain continuity. Both components share identical package specifications and electrical output characteristics, enabling direct pin-compatible replacement in 16-DIP through-hole applications.

The CD74AC157E provides extended operating temperature range (-55°C to 125°C versus -40°C to 85°C) and lower minimum supply voltage (1.5V versus 2V), offering broader application flexibility. Both parts maintain REACH compliance and EAR99 export classification. The substitute part's RoHS3 compliance status provides additional regulatory alignment for new designs.

Frequently Asked Questions (FAQ)

Q: Can the CD74AC157E directly replace the 74AC157PC in existing designs?

A: Yes. Both parts feature identical 16-DIP package dimensions, matching pin configurations, and equivalent output current specifications (24mA high and low). Direct pin-for-pin substitution is valid for applications operating within the overlapping voltage range (2V to 5.5V) and temperature range (-40°C to 85°C).

Q: What are the key differences between these parts?

A: The primary differences are manufacturer (onsemi versus Texas Instruments), product status (obsolete versus active), and operating specifications. The CD74AC157E supports lower minimum supply voltage (1.5V) and extended temperature range (-55°C to 125°C). These differences favor the substitute part for new designs and applications requiring broader environmental specifications.

Q: Are there packaging or mounting differences?

A: No. Both parts use identical 16-DIP (0.300", 7.62mm) through-hole packages. No PCB layout modifications or mechanical changes are required for substitution.

Q: What compliance certifications apply to the substitute part?

A: The CD74AC157E is RoHS3 compliant and maintains REACH unaffected status. Both parts share EAR99 export classification and identical HTSUS commodity codes (8542.39.0001).

Q: Is the substitute part suitable for new production designs?

A: Yes. The CD74AC157E's active product status, extended operating specifications, and regulatory compliance make it the appropriate choice for new designs requiring 4 x 2:1 multiplexer functionality in 16-DIP through-hole packages.