SN74ACT08DRG4 Equivalent & Substitute Parts

Part Overview

The SN74ACT08DRG4 is a 4-channel 2-input AND gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This part is currently discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications. Suitable alternatives maintain identical electrical characteristics and pin configurations while offering active product status and improved supply chain availability.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	24mA, 24mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	9ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74ACT08DRG4 are classified based on strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Logic Type: AND Gate (4 channels, 2 inputs per channel)
Voltage Supply Range: 4.5V ~ 5.5V
Package: 14-SOIC surface mount
Operating Temperature Range: -40°C ~ 85°C
Output Current Capability: 24mA (high and low)
Propagation Delay: 9ns @ 5V, 50pF

Substitution Categories:

Texas Instruments Direct Equivalents – Identical electrical specifications with packaging variations (Cut Tape, Tape & Reel)
onsemi Manufacturer Equivalents – Functionally equivalent with allowable parameter variance (quiescent current up to 4 µA)

All substitute parts maintain the same base product number (74ACT08) and are compatible with circuits designed for the SN74ACT08DRG4.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Packaging	Quiescent Current (Max)	Propagation Delay	Operating Temp	RoHS Status
SN74ACT08DRG4	Texas Instruments	Discontinued	14-SOIC	2 µA	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
SN74ACT08DR	Texas Instruments	Active	14-SOIC (CT & Digi-Reel)	2 µA	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
SN74ACT08DRG3	Texas Instruments	Active	14-SOIC (CT & Digi-Reel)	2 µA	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
SN74ACT08IDREP	Texas Instruments	Active	14-SOIC (Tape & Reel)	2 µA	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
74ACT08SC	onsemi	Active	14-SOIC (Tube)	4 µA	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
MC74ACT08DG	onsemi	Active	14-SOIC (Tube)	4 µA	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
74ACT08SCX	onsemi	Active	14-SOIC (CT & Digi-Reel)	4 µA	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
MC74ACT08DR2G	onsemi	Active	14-SOIC (Tape & Reel)	4 µA	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation – Texas Instruments Equivalents: SN74ACT08DR, SN74ACT08DRG3, and SN74ACT08IDREP are direct functional equivalents with identical electrical specifications to the SN74ACT08DRG4. These parts maintain the 2 µA maximum quiescent current specification and are manufactured by the original supplier. Selection among these three depends on packaging requirements: Cut Tape & Digi-Reel for standard production, or Tape & Reel for high-volume automated assembly.

Secondary Recommendation – onsemi Equivalents: 74ACT08SC, MC74ACT08DG, 74ACT08SCX, and MC74ACT08DR2G are functionally equivalent alternatives from onsemi. These parts operate within the same voltage and temperature ranges with identical propagation delay characteristics. The quiescent current specification is 4 µA maximum, which remains within acceptable limits for most applications. Selection depends on packaging format: Tube for manual assembly, Cut Tape & Digi-Reel for standard production, or Tape & Reel for automated assembly.

All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can I use onsemi parts as direct replacements for Texas Instruments SN74ACT08DRG4?

A: Yes. onsemi 74ACT08 series parts are functionally equivalent. The primary difference is quiescent current specification (4 µA maximum versus 2 µA). This difference does not affect circuit functionality in standard logic applications. Pin configuration, voltage supply range, propagation delay, and output current capabilities are identical.

Q: What is the difference between packaging options (Cut Tape, Tube, Tape & Reel)?

A: Packaging affects handling and assembly methods. Cut Tape & Digi-Reel is suitable for standard production environments. Tube packaging is used for manual assembly and lower-volume applications. Tape & Reel is optimized for high-volume automated pick-and-place assembly. All packaging options contain identical die and electrical performance.

Q: Is the SN74ACT08DRG3 identical to the SN74ACT08DRG4?

A: Both parts are Texas Instruments 74ACT08 AND gate ICs with identical electrical specifications. The suffix difference (G3 versus G4) indicates different manufacturing date codes or tape reel configurations. Functionally and electrically, they are equivalent for circuit design purposes.

Q: Can I mix different manufacturers in the same circuit board?

A: Yes. All substitute parts meet the same electrical specifications for logic levels, propagation delay, and operating temperature. Mixing Texas Instruments and onsemi parts on the same board does not create compatibility issues.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. All listed substitute parts are ROHS3 compliant, ensuring compatibility with modern manufacturing and environmental standards.

Q: Why is the original SN74ACT08DRG4 discontinued?

A: Product discontinuation is a normal lifecycle event in semiconductor manufacturing. Active equivalent parts from both Texas Instruments and onsemi provide identical functionality and are recommended for new designs and replacement applications.

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