74ACTQ32SJX OR Gate IC Equivalent & Substitute Parts

Part Overview

The 74ACTQ32SJX is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-SOP surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74ACTQ32SJX operates within a 4.5V to 5.5V supply voltage range and is suitable for applications requiring standard TTL-compatible logic gating functions.

Substiute Parts

74ACTQ32SJX

onsemiIn Stock: 345674ACTQ32SJX 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 for the 74ACTQ32SJX is determined by the following criteria:

Core Functional Requirements:

• Logic Type: OR Gate
• Number of Circuits: 4
• Number of Inputs: 2 per circuit
• Voltage Supply Range: 4.5V ~ 5.5V
• Output Drive Capability: 24mA (High and Low)
• Input Logic Levels: Low ≤ 0.8V, High ≥ 2V

Acceptable Variations:

• Propagation Delay: Up to 12.1ns @ 5V, 50pF (original part: 6.5ns)
• Operating Temperature Range: -55°C ~ 125°C acceptable (original: -40°C ~ 85°C)
• Quiescent Current: Up to 4 µA (original: 2 µA)
• Package Variants: 14-SOIC with width tolerance (0.154" to 0.209")
• Product Status: Active or Discontinued parts acceptable; Obsolete status requires replacement

All substitute parts listed maintain the 74ACT32 base product number designation and are functionally equivalent within the specified parameter tolerances.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Long-Term Availability: SN74ACT32DR (Texas Instruments) is the primary recommendation. This part is currently active in production, ROHS3 compliant, and maintains the original quiescent current specification of 2 µA with 9ns propagation delay. The 14-SOIC package (0.154" width) is standard for modern manufacturing.

For Exact Package Compatibility (0.209" Width): SN74ACT32NSR (Texas Instruments) provides the closest physical match to the original 74ACTQ32SJX, maintaining the wider 14-SOIC package footprint. This part is active and ROHS3 compliant.

For Extended Temperature Range Applications: CD74ACT32M96 (Texas Instruments) supports -55°C ~ 125°C operating range and is ROHS3 compliant. Propagation delay increases to 12.1ns, which remains within acceptable logic gate performance for most applications.

Obsolete Part Avoidance: CD74ACT32M (Harris Corporation) and SN74ACT32D should be avoided for new procurement due to obsolete or discontinued status. These parts present supply chain risk and should only be considered for legacy system maintenance where no alternatives are available.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74ACTQ32SJX with SN74ACT32DR without circuit modification? A: Yes. Both parts meet the core functional requirements: 4-channel 2-input OR gate, 4.5V ~ 5.5V supply, 24mA output drive, and identical input logic levels. The 9ns propagation delay of SN74ACT32DR is faster than the original 6.5ns specification, ensuring compatibility in timing-critical applications.

Q: What is the difference between the 14-SOIC packages listed (0.154" vs 0.209" width)? A: Both are 14-pin SOIC packages with different body widths. The 0.154" width (narrow body) is the modern standard used by most manufacturers. The 0.209" width (wide body) is the original package form. Both fit standard 14-SOIC PCB footprints with appropriate land pattern design. Verify your PCB layout supports the selected package width.

Q: Why does CD74ACT32M96 have higher propagation delay (12.1ns) than the original part (6.5ns)? A: Propagation delay variation is a normal characteristic across different manufacturing processes and temperature ranges. The 12.1ns specification for CD74ACT32M96 is measured across the extended -55°C ~ 125°C temperature range, whereas the original 6.5ns is specified at -40°C ~ 85°C. At the original temperature range, CD74ACT32M96 would perform faster.

Q: Is RoHS compliance required for my application? A: If your application or end market requires RoHS compliance, select from SN74ACT32DR, SN74ACT32DG4, SN74ACT32D, or CD74ACT32M96 (all ROHS3 compliant). CD74ACT32M is RoHS non-compliant and should not be used in RoHS-regulated applications.

Q: Which substitute part has the best current availability? A: SN74ACT32DR has the highest inventory (7,144 pcs) among active parts, followed by CD74ACT32M96 (2,900 pcs). Both are suitable for immediate procurement.

Q: Can I use parts with different quiescent current specifications (2 µA vs 4 µA)? A: Yes. The difference of 2 µA quiescent current is negligible in most applications. Select based on other criteria such as product status, compliance requirements, and package compatibility. The 4 µA specification does not indicate reduced performance or reliability.