SN74ACT08DG4 Equivalent & Substitute Parts

Part Overview

The SN74ACT08DG4 is a 4-channel AND gate logic IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This part is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications. The 74ACT08 logic family provides standard AND gate functionality across multiple manufacturers and packaging options, enabling direct functional replacement when the original part becomes unavailable.

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

Substitution of the SN74ACT08DG4 is determined by strict equivalence across the following parameters:

Logic Type: AND Gate (4-channel, 2-input configuration)
Voltage Supply Range: 4.5V ~ 5.5V
Package Type: 14-SOIC surface mount
Operating Temperature Range: -40°C ~ 85°C
Output Drive Capability: 24mA high and low
Propagation Delay: 9ns @ 5V, 50pF
Input Logic Levels: 0.8V low, 2V high

Substitute parts are grouped into three categories based on manufacturer and product status:

Direct Manufacturer Substitutes (Texas Instruments): Parts with identical electrical specifications and active or equivalent product status from the original manufacturer.

MFR Recommended Substitutes (onsemi): Cross-manufacturer equivalents with identical functional parameters and active product status, recommended as primary alternatives.

Parametric Equivalents (onsemi): Parts meeting all electrical and mechanical specifications with active product status, suitable for direct replacement in circuit applications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Quiescent Current (Max)	Voltage Supply	Propagation Delay	Operating Temp	Inventory
SN74ACT08DG4	Texas Instruments	Discontinued at DiGi Electronics	14-SOIC	2 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	1076 Pcs
SN74ACT08DR	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	2 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	2179 Pcs
SN74ACT08D	Texas Instruments	Discontinued at DiGi Electronics	Tube	2 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	3400 Pcs
74ACT08SCX	onsemi	Active	Cut Tape (CT) & Digi-Reel®	4 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	15691 Pcs
MC74ACT08DR2G	onsemi	Active	Tape & Reel (TR)	4 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	40300 Pcs
74ACT08SC	onsemi	Active	Tube	4 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	1505 Pcs
MC74ACT08DG	onsemi	Active	Tube	4 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	3620 Pcs

Engineering Selection Recommendations

Primary Substitute: SN74ACT08DR (Texas Instruments) is the recommended first choice. It maintains identical electrical specifications to the original SN74ACT08DG4, carries active product status, and is available in higher inventory (2179 pcs). The packaging format (Cut Tape & Digi-Reel®) is suitable for automated assembly processes.

Secondary Substitutes: The onsemi 74ACT08 variants (74ACT08SCX, MC74ACT08DR2G, 74ACT08SC, MC74ACT08DG) are functionally equivalent with all critical parameters matching the original part. These parts carry active product status and offer significantly higher inventory availability. The quiescent current specification (4 µA maximum) is slightly higher than the original (2 µA maximum) but remains within acceptable operating margins for standard logic applications. MC74ACT08DR2G offers the highest inventory level (40300 pcs) and Tape & Reel packaging for high-volume production.

Compliance: All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical ECCN/HTSUS classifications, ensuring regulatory and supply chain compatibility.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SN74ACT08DG4 with SN74ACT08DR? A: Yes. Both parts are Texas Instruments 74ACT08 AND gates with identical electrical specifications, operating temperature range, and 14-SOIC packaging. The primary difference is packaging format (Digi-Reel vs. standard tube), which does not affect circuit functionality.

Q: What is the difference between Texas Instruments and onsemi 74ACT08 parts? A: Both manufacturers produce functionally equivalent 74ACT08 logic gates meeting the same electrical specifications. The onsemi variants have a maximum quiescent current of 4 µA compared to 2 µA for Texas Instruments parts. This difference is negligible for standard logic applications and does not affect propagation delay, output drive capability, or logic levels.

Q: Which substitute offers the best availability? A: MC74ACT08DR2G (onsemi) provides the highest inventory at 40300 pcs and is available in Tape & Reel packaging, making it optimal for high-volume production runs.

Q: Are all substitutes RoHS compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 rating, identical to the original SN74ACT08DG4.

Q: Does packaging format affect circuit performance? A: No. Packaging format (Tube, Cut Tape, Digi-Reel, or Tape & Reel) affects handling and assembly processes but not electrical performance. All 14-SOIC packages are mechanically and electrically equivalent.

Q: Can I use onsemi parts as direct replacements in existing designs? A: Yes. The onsemi 74ACT08 variants meet all electrical and mechanical specifications of the original part. The slightly higher quiescent current (4 µA vs. 2 µA) has no practical impact on circuit operation in standard logic applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message