74AC151PC Equivalent & Substitute Parts

Part Overview

The 74AC151PC is a 1 x 8:1 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 74AC151 series provides single-supply multiplexing functionality suitable for digital logic applications requiring data selection from eight input lines.

Substiute Parts

74AC151PC

onsemiIn Stock: 129974AC151PC Datasheet

Current PartRFQ

CD74AC151E

Texas InstrumentsIn Stock: 1683CD74AC151E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74AC151PC is determined by the following critical parameters:

• Circuit configuration: 1 x 8:1 multiplexer topology
• Output current capability: 24mA high and low
• Package type: 16-DIP through-hole form factor
• Supply voltage compatibility: Single supply operation
• Logic family: 74AC series

The CD74AC151E from Texas Instruments qualifies as a direct substitute based on matching circuit configuration, output current specifications, package form factor, and logic family designation. Both components implement identical 1 x 8:1 multiplexer functionality within the same 16-DIP package footprint.

Parameter Comparison

Engineering Selection Recommendations

The CD74AC151E from Texas Instruments is the direct equivalent for the obsolete 74AC151PC. Selection of the Texas Instruments part is supported by:

• Active product status, ensuring long-term availability and supply chain continuity
• RoHS3 compliance, meeting current environmental and regulatory requirements
• Identical circuit topology and output current specifications
• Compatible 16-DIP package footprint for direct board-level substitution
• Extended operating temperature range (-55°C ~ 125°C) providing broader application flexibility
• Expanded supply voltage range (1.5V ~ 5.5V) accommodating wider system designs

The CD74AC151E operates within the supply voltage range of the original part and maintains full functional equivalence for 1 x 8:1 multiplexing applications.

Frequently Asked Questions (FAQ)

Q: Can the CD74AC151E directly replace the 74AC151PC on existing PCBs?

A: Yes. Both components use identical 16-DIP package geometry with matching pin assignments. No PCB modifications are required for substitution.

Q: Are there differences in electrical performance between these parts?

A: Output current specifications are identical at 24mA for both high and low states. The CD74AC151E operates across a wider supply voltage range (1.5V ~ 5.5V versus 2V ~ 6V) and extended temperature range (-55°C ~ 125°C versus -40°C ~ 85°C), making it suitable for more demanding applications.

Q: Why is the 74AC151PC listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by onsemi. The CD74AC151E provides equivalent functionality from an active manufacturer.

Q: What is the significance of the 74AC series designation?

A: The 74AC designation identifies the logic family and functional series. Both the 74AC151PC and CD74AC151E belong to this family, ensuring compatible logic levels and timing characteristics.

Q: Are compliance certifications equivalent between these parts?

A: Both parts carry REACH Unaffected and EAR99 ECCN classifications. The CD74AC151E additionally carries RoHS3 compliance, meeting current environmental standards.