74ACTQ32SCX OR Gate IC Equivalent & Substitute Parts

Part Overview

The 74ACTQ32SCX is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74ACTQ32SCX operates within the 4.5V to 5.5V supply voltage range and is suitable for applications requiring standard TTL-compatible logic gating functions.

Substiute Parts

74ACTQ32SCX

onsemiIn Stock: 179474ACTQ32SCX Datasheet

Current PartRFQ

74ACT32SCX

Fairchild SemiconductorIn Stock: 4880974ACT32SCX Datasheet

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MC74ACT32DG

onsemiIn Stock: 2384MC74ACT32DG Datasheet

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MC74ACT32DR2G

onsemiIn Stock: 1766MC74ACT32DR2G Datasheet

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CD74ACT32M

Harris CorporationIn Stock: 2302CD74ACT32M Datasheet

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CD74ACT32M96

Texas InstrumentsIn Stock: 3001CD74ACT32M96 Datasheet

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SN74ACT32D

Texas InstrumentsIn Stock: 3904SN74ACT32D Datasheet

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SN74ACT32DG4

Texas InstrumentsIn Stock: 932SN74ACT32DG4 Datasheet

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SN74ACT32DR

Texas InstrumentsIn Stock: 7160SN74ACT32DR Datasheet

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SN74ACT32NSR

Texas InstrumentsIn Stock: 850SN74ACT32NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACTQ32SCX is determined by the following criteria:

Primary Substitution Parameters:

• Logic type: OR Gate
• Circuit count: 4 channels
• Input count: 2 inputs per channel
• Supply voltage range: 4.5V ~ 5.5V
• Output current capability: 24mA high and low
• Input logic thresholds: 0.8V low, 2V high
• Package type: 14-SOIC surface mount
• Mounting type: Surface mount

Secondary Considerations:

• Propagation delay specifications
• Operating temperature range
• Quiescent current characteristics
• Product status and availability
• Compliance certifications (RoHS, REACH)

Substitute parts must maintain electrical compatibility across all primary parameters. Variations in propagation delay, quiescent current, and operating temperature range are acceptable provided the substitute meets or exceeds the performance envelope required by the application.

Parameter Comparison

Engineering Selection Recommendations

Preferred Active Substitutes:

For new designs and ongoing procurement, the following parts are recommended based on active product status and full compliance certifications:

• SN74ACT32DR (Texas Instruments): Active status with RoHS3 compliance. Quiescent current and propagation delay match the original 74ACTQ32SCX specification. 7,144 units in stock.

• MC74ACT32DG (onsemi): Active status with RoHS3 compliance. Manufactured by the same supplier as the original part. 2,356 units in stock.

• MC74ACT32DR2G (onsemi): Active status with RoHS3 compliance and Digi-Reel packaging. 1,698 units in stock.

• CD74ACT32M96 (Texas Instruments): Active status with RoHS3 compliance. Extended operating temperature range (-55°C to 125°C) suitable for industrial applications. 2,900 units in stock.

Secondary Substitutes:

• 74ACT32SCX (Fairchild Semiconductor): Active status with standard operating temperature range. Slightly higher quiescent current (4 µA) and propagation delay (9ns). 48,707 units in stock.

Discontinued Parts (Not Recommended for New Designs):

• SN74ACT32D and SN74ACT32DG4 are discontinued at DiGi Electronics and should not be selected for new designs.

Package Consideration:

• SN74ACT32NSR uses a 14-SO package (0.209", 5.30mm width) rather than the standard 14-SOIC (0.154", 3.90mm width). This part is electrically equivalent but physically incompatible with PCB layouts designed for the narrower SOIC package.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts directly in place of the 74ACTQ32SCX?

A: All listed substitute parts are electrically compatible with the 74ACTQ32SCX within the specified operating parameters. However, verify PCB footprint compatibility. The SN74ACT32NSR uses a wider 14-SO package and is not pin-compatible with standard 14-SOIC layouts.

Q: What is the difference between the 74ACTQ32SCX and 74ACT32SCX?

A: Both are 4-channel 2-input OR gates with identical logic function and package. The 74ACT32SCX has slightly higher quiescent current (4 µA vs. 2 µA) and propagation delay (9ns vs. 6.5ns). The 74ACTQ32SCX is obsolete while the 74ACT32SCX remains active.

Q: Why do some substitutes have different propagation delays?

A: Propagation delay variations (6.5ns to 12.1ns) reflect manufacturing process differences between suppliers. All values remain within acceptable logic timing margins for standard TTL applications. Verify timing requirements for your specific circuit.

Q: Are all substitute parts RoHS compliant?

A: Active substitutes (SN74ACT32DR, MC74ACT32DG, MC74ACT32DR2G, CD74ACT32M96) are RoHS3 compliant. The obsolete CD74ACT32M is RoHS non-compliant.

Q: What is the difference between MC74ACT32DG and MC74ACT32DR2G?

A: Both are onsemi 74ACT32 OR gates with identical electrical specifications. The primary difference is packaging: MC74ACT32DG is supplied in tube packaging, while MC74ACT32DR2G is supplied in cut tape and Digi-Reel format for automated assembly.

Q: Can I use CD74ACT32M96 in applications requiring the extended temperature range?

A: Yes. CD74ACT32M96 operates from -55°C to 125°C, compared to the standard -40°C to 85°C range of the 74ACTQ32SCX. This part is suitable for industrial and automotive applications requiring extended temperature performance.

Q: Which substitute has the best availability?

A: 74ACT32SCX (Fairchild Semiconductor) has the highest inventory at 48,707 units. For onsemi-sourced alternatives, MC74ACT32DG has 2,356 units in stock.