74ACT157PC Equivalent & Substitute Parts

Part Overview

The 74ACT157PC is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in a 16-DIP through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74ACT157 series provides multiplexing functionality suitable for digital logic applications requiring signal selection across multiple input channels.

Substiute Parts

74ACT157PC

onsemiIn Stock: 206174ACT157PC Datasheet

Current PartRFQ

CD74ACT157E

Texas InstrumentsIn Stock: 2100CD74ACT157E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT157PC is determined by the following critical parameters that must remain consistent:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Package type: 16-DIP (0.300", 7.62mm) through-hole
• Voltage supply range: 4.5V ~ 5.5V
• Output current capability: 24mA high and low
• Series compatibility: 74ACT logic family
• Independent circuits: 1

The CD74ACT157E from Texas Instruments satisfies all substitution criteria within these allowed parameters. Both parts maintain identical functional specifications and physical packaging, enabling direct replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

The CD74ACT157E from Texas Instruments is the direct substitute for the obsolete 74ACT157PC. Both components share identical electrical specifications and physical packaging, ensuring functional compatibility in circuit applications.

The CD74ACT157E offers extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C) and active product status with RoHS3 compliance, providing advantages for new designs and long-term availability. The Texas Instruments part maintains all critical electrical parameters required for direct replacement.

Selection between these parts should be based on availability, supply chain requirements, and compliance certifications applicable to the end application.

Frequently Asked Questions (FAQ)

Q: Can the CD74ACT157E directly replace the 74ACT157PC?

A: Yes. Both parts are 4 x 2:1 multiplexers in 16-DIP packages with identical voltage supply ranges (4.5V ~ 5.5V), output current ratings (24mA), and logic family specifications. Physical and electrical compatibility is confirmed.

Q: What is the difference in operating temperature range?

A: The 74ACT157PC operates from -40°C to 85°C, while the CD74ACT157E operates from -55°C to 125°C. The extended range of the Texas Instruments part provides greater flexibility for applications requiring operation outside the onsemi specification limits.

Q: Are there packaging differences between these parts?

A: Both parts use identical 16-DIP (0.300", 7.62mm) through-hole packaging. The CD74ACT157E is supplied in tube packaging, while the 74ACT157PC packaging type was not specified. Pin configuration and board layout compatibility are identical.

Q: Why is the 74ACT157PC listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by onsemi. The CD74ACT157E from Texas Instruments remains in active production, making it the recommended source for new procurement.

Q: Are compliance certifications equivalent?

A: Both parts carry REACH Unaffected and EAR99 ECCN classifications. The CD74ACT157E additionally carries RoHS3 compliance certification, meeting current regulatory requirements for electronic components in many markets.