74ACTQ32PC Equivalent & Substitute Parts

Part Overview

The 74ACTQ32PC is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-MDIP packaging. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The 74ACTQ32PC operates within the 74ACT logic family standard, which defines compatible electrical and mechanical parameters across multiple manufacturers.

Substiute Parts

74ACTQ32PC

onsemiIn Stock: 103974ACTQ32PC Datasheet

Current PartRFQ

CD74ACT32E

Harris CorporationIn Stock: 3350CD74ACT32E Datasheet

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SN74ACT32N

Texas InstrumentsIn Stock: 3847SN74ACT32N Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ACTQ32PC are qualified based on the following criteria:

Functional Equivalence: All substitute parts must implement the same logic function (4-channel 2-input OR gate) with identical circuit count and input configuration.

Electrical Compatibility: Supply voltage range (4.5V ~ 5.5V), output drive capability (24mA), and input logic thresholds must match the original specification.

Package Compatibility: All parts must use 14-DIP through-hole packaging with 0.300" (7.62mm) pitch to ensure direct board-level substitution.

Logic Family Standard: All parts conform to the 74ACT logic family standard, which guarantees parameter compatibility across qualified manufacturers.

The following parts meet these substitution criteria: SN74ACT32N (Texas Instruments) and CD74ACT32E (Harris Corporation).

Parameter Comparison

Engineering Selection Recommendations

SN74ACT32N (Texas Instruments) is the primary substitute for new designs and ongoing procurement. This part is actively manufactured, ensuring long-term availability. It maintains identical electrical specifications to the 74ACTQ32PC, including quiescent current (2 µA) and operating temperature range (-40°C ~ 85°C). The SN74ACT32N carries RoHS3 compliance certification, meeting modern environmental standards. Propagation delay is 9ns at 5V with 50pF load, which is within acceptable performance parameters for most applications.

CD74ACT32E (Harris Corporation) is a secondary substitute option. While functionally equivalent and electrically compatible, this part is obsolete and may have limited availability. It exhibits higher quiescent current (4 µA) and longer propagation delay (12.1ns), which may impact power consumption and timing-critical applications. The extended operating temperature range (-55°C ~ 125°C) provides advantage in extreme temperature environments. This part is RoHS non-compliant.

For new designs, SN74ACT32N is the recommended choice due to active production status and modern compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT32N directly replace 74ACTQ32PC on existing PCBs?

A: Yes. Both parts use identical 14-DIP through-hole packaging with 0.300" pitch. Electrical specifications are compatible across all critical parameters: supply voltage, output drive, input thresholds, and logic function. Direct board-level substitution is possible without circuit modification.

Q: What is the difference in propagation delay between these parts?

A: The 74ACTQ32PC has 6.5ns propagation delay at 5V with 50pF load. The SN74ACT32N has 9ns, and the CD74ACT32E has 12.1ns. For most general-purpose logic applications, these differences are not significant. Applications with strict timing requirements should verify that the longer delays do not violate system timing constraints.

Q: Why is the 74ACTQ32PC obsolete?

A: The 74ACTQ32PC is classified as obsolete by onsemi. Substitute parts from active manufacturers (such as Texas Instruments) are necessary to ensure continued component availability and design support.

Q: Are there compliance differences between substitute parts?

A: Yes. The SN74ACT32N is RoHS3 compliant and REACH unaffected. The CD74ACT32E is RoHS non-compliant. For applications requiring environmental compliance certification, SN74ACT32N is the appropriate choice.

Q: Can CD74ACT32E be used in high-temperature applications?

A: The CD74ACT32E operates from -55°C to 125°C, providing a wider temperature range than the 74ACTQ32PC (-40°C to 85°C). However, the part is obsolete and may have procurement limitations. For high-temperature requirements, verify that SN74ACT32N's -40°C to 85°C range meets application needs before considering alternatives.

Q: What is the quiescent current difference, and does it matter?

A: The 74ACTQ32PC and SN74ACT32N both have 2 µA maximum quiescent current. The CD74ACT32E has 4 µA. For battery-powered or low-power applications, this difference may be relevant in designs with many ICs. For standard applications, the difference is negligible.