74AC32PC OR Gate IC Equivalent & Substitute Parts

Part Overview

The 74AC32PC is a 4-channel 2-input OR gate logic IC manufactured by onsemi, housed in a 14-MDIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74AC32 series represents a standard logic gate function across multiple manufacturers, enabling direct functional substitution where electrical and mechanical parameters align.

Substiute Parts

74AC32PC

onsemiIn Stock: 123774AC32PC Datasheet

Current PartRFQ

CD74AC32E

Harris CorporationIn Stock: 2628CD74AC32E Datasheet

SimilarRFQ

SN74AC32N

Texas InstrumentsIn Stock: 2315SN74AC32N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74AC32PC is determined by strict alignment of the following parameters:

• Logic function: 4-channel 2-input OR gate
• Output drive capability: 24mA high and low
• Propagation delay: 7.5ns @ 5V, 50pF
• Supply voltage range: 2V ~ 6V
• Operating temperature range: -40°C ~ 85°C
• Package form factor: 14-DIP through-hole configuration

The substitute parts CD74AC32E and SN74AC32N maintain the core logic function and package compatibility. Variations in quiescent current, input logic levels, and supply voltage ranges are noted but do not prevent functional substitution within the specified operating parameters of the 74AC32PC.

Parameter Comparison

Engineering Selection Recommendations

SN74AC32N (Texas Instruments) is the preferred substitute for the 74AC32PC. This part maintains identical electrical specifications for supply voltage, quiescent current, output drive, and propagation delay. The SN74AC32N carries Active product status, ensuring continued availability and manufacturing support. The part is RoHS3 compliant, meeting modern environmental and regulatory requirements. The 14-PDIP package is mechanically compatible with the original 14-MDIP footprint for through-hole applications.

CD74AC32E (Harris Corporation) functions as an alternative substitute where supply voltage flexibility is required. This part operates across a wider supply range (1.5V ~ 5.5V) and extended temperature range (-55°C ~ 125°C), supporting applications with broader environmental specifications. The propagation delay of 9.5ns @ 5V, 50pF exceeds the original specification by 2ns, which may impact timing-critical designs. The CD74AC32E is classified as obsolete, limiting long-term procurement reliability.

For new designs and ongoing production, SN74AC32N is the recommended primary choice. CD74AC32E may be considered only where the extended operating temperature range or lower supply voltage floor provides specific design advantages and timing margins accommodate the increased propagation delay.

Frequently Asked Questions (FAQ)

Q: Can the CD74AC32E replace the 74AC32PC in all applications?

A: The CD74AC32E provides functional substitution with compatible logic operation and package form factor. However, the propagation delay increases from 7.5ns to 9.5ns. Applications with timing constraints must verify that this 2ns increase does not violate system timing requirements. The extended supply voltage range (1.5V ~ 5.5V) versus the original (2V ~ 6V) may benefit designs operating at lower supply voltages.

Q: Is the SN74AC32N a direct replacement for the 74AC32PC?

A: Yes. The SN74AC32N matches the 74AC32PC across all critical electrical parameters: supply voltage (2V ~ 6V), quiescent current (2 µA), output drive (24mA), and propagation delay (7.5ns @ 5V, 50pF). The 14-PDIP package is mechanically compatible with the original 14-MDIP footprint. Active product status ensures ongoing availability.

Q: What is the difference between 14-MDIP and 14-PDIP packaging?

A: Both designations refer to 14-pin dual in-line packages with 0.300" (7.62mm) row spacing. The packages are mechanically and electrically compatible for through-hole PCB applications. MDIP and PDIP represent different manufacturer nomenclature for the same physical form factor.

Q: Why is the 74AC32PC obsolete?

A: The 74AC32PC is classified as obsolete by onsemi, indicating discontinued manufacturing. Substitute parts from active manufacturers (such as Texas Instruments SN74AC32N) ensure design continuity and procurement reliability for applications requiring this logic function.

Q: Can I use the CD74AC32E in a design originally specified for the 74AC32PC?

A: Functional substitution is possible where timing margins accommodate the 9.5ns propagation delay. The extended operating temperature range (-55°C ~ 125°C) and wider supply voltage range (1.5V ~ 5.5V) may introduce compatibility considerations. Verify that system timing requirements and supply voltage specifications align with the CD74AC32E parameters before implementation.

Q: Are there RoHS compliance differences between these parts?

A: The SN74AC32N is RoHS3 compliant, meeting current environmental regulations. The CD74AC32E is RoHS non-compliant. For applications subject to RoHS requirements, the SN74AC32N is the appropriate selection.