74ACTQ08SC Equivalent & Substitute Parts

Part Overview

The 74ACTQ08SC is a 4-channel 2-input AND gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74ACTQ08SC operates within the 4.5V to 5.5V supply voltage range and is suitable for standard logic applications requiring AND gate functionality with 2-input configurations per channel.

Substiute Parts

74ACTQ08SC

onsemiIn Stock: 286274ACTQ08SC Datasheet

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74ACT08SC

onsemiIn Stock: 152074ACT08SC Datasheet

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MC74ACT08DG

onsemiIn Stock: 3657MC74ACT08DG Datasheet

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MC74ACT08DR2G

onsemiIn Stock: 40318MC74ACT08DR2G Datasheet

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CD74ACT08M

Harris CorporationIn Stock: 1806CD74ACT08M Datasheet

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CD74ACT08M96

Texas InstrumentsIn Stock: 2657CD74ACT08M96 Datasheet

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SN74ACT08D

Texas InstrumentsIn Stock: 3414SN74ACT08D Datasheet

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SN74ACT08DR

Texas InstrumentsIn Stock: 2255SN74ACT08DR Datasheet

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SN74ACT08IDREP

Texas InstrumentsIn Stock: 751SN74ACT08IDREP Datasheet

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SN74ACT08NSR

Texas InstrumentsIn Stock: 1926SN74ACT08NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACTQ08SC is determined by the following critical parameters:

• Logic Type: AND Gate with 4 channels and 2 inputs per channel
• Supply Voltage Range: 4.5V ~ 5.5V
• Package Type: 14-SOIC surface mount
• Input/Output Logic Levels: Low 0.8V, High 2V
• Output Current Capability: 24mA high and low
• Operating Temperature Range: -40°C ~ 85°C (standard industrial range)

Substitute parts must maintain identical logic functionality, pin configuration, and electrical characteristics within the specified voltage and temperature ranges. Parts with different package types (such as 14-SO with 0.209" width) are considered compatible alternatives only when board layout permits the dimensional variation.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the obsolete 74ACTQ08SC, the following active parts are recommended based on product status and compliance certifications:

Primary Substitutes (Identical Operating Temperature Range):

• SN74ACT08DR (Texas Instruments, Active, ROHS3 Compliant): Matches quiescent current specification at 2 µA and operates within -40°C to 85°C range. Available in Cut Tape and Digi-Reel packaging.
• SN74ACT08IDREP (Texas Instruments, Active, ROHS3 Compliant): Identical electrical characteristics to SN74ACT08DR, supplied in Tape & Reel format.
• 74ACT08SC (onsemi, Active, ROHS3 Compliant): Direct onsemi alternative with same package and temperature range, though quiescent current increases to 4 µA.

Extended Temperature Range Alternative:

• CD74ACT08M96 (Texas Instruments, Active, ROHS3 Compliant): Supports -55°C to 125°C operating range for applications requiring extended temperature performance. Propagation delay increases to 12.9ns.

Package Variant:

• SN74ACT08NSR (Texas Instruments, Active, ROHS3 Compliant): Functionally equivalent with wider 14-SO package (0.209" width) instead of standard 14-SOIC (0.154" width). Board layout modification required.

All recommended active substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can I use 74ACT08SC as a direct replacement for 74ACTQ08SC?

A: Yes. Both parts share identical logic functionality, pin configuration, supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and 14-SOIC package. The 74ACT08SC is active and ROHS3 compliant. Quiescent current increases from 2 µA to 4 µA, which is acceptable for most applications.

Q: What is the difference between SN74ACT08DR and SN74ACT08IDREP?

A: Both parts are manufactured by Texas Instruments with identical electrical specifications and quiescent current (2 µA). The primary difference is packaging format: SN74ACT08DR is supplied in Cut Tape and Digi-Reel format, while SN74ACT08IDREP is supplied in Tape & Reel format. Select based on your assembly process requirements.

Q: Why does CD74ACT08M96 have a longer propagation delay (12.9ns vs. 6.5ns)?

A: CD74ACT08M96 is a different silicon variant with extended temperature range capability (-55°C ~ 125°C). The increased propagation delay is a characteristic of this variant. Use this part only if extended temperature operation is required for your application.

Q: Can I use SN74ACT08NSR in place of 74ACTQ08SC?

A: Electrically yes, but with a physical constraint. SN74ACT08NSR has a wider 14-SO package (0.209" width) compared to the standard 14-SOIC (0.154" width). Board layout modification is necessary to accommodate the larger package footprint.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant except CD74ACT08M (obsolete, RoHS non-compliant). For new designs, select from active ROHS3 compliant alternatives.

Q: What is the difference between 74ACT08SC and MC74ACT08DG?

A: Both are onsemi parts with identical electrical specifications and operating temperature range. 74ACT08SC is supplied in Tube packaging, while MC74ACT08DG is supplied in Tube packaging as well. MC74ACT08DR2G is the Tape & Reel variant of the same part. Select based on your procurement and assembly requirements.