SN74ACT08DRE4 Equivalent & Substitute Parts

Part Overview

The SN74ACT08DRE4 is a 4-channel 2-input AND gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. 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 with ACT-level speed and power characteristics suitable for digital logic circuits requiring 4.5V to 5.5V supply operation.

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)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74ACT08DRE4 is determined by strict equivalence across the following critical parameters:

Logic Type: AND Gate (4 channels, 2 inputs per channel)
Package: 14-SOIC surface mount form factor
Voltage Supply Range: 4.5V ~ 5.5V
Input/Output Logic Levels: 0.8V (low), 2V (high)
Propagation Delay: 9ns @ 5V, 50pF
Operating Temperature: -40°C ~ 85°C
RoHS3 Compliance and MSL Level 1

Substitute parts are grouped into two categories: Texas Instruments parametric equivalents (identical specifications) and onsemi manufacturer-recommended alternatives (functionally equivalent with minor quiescent current variance within acceptable operating margins).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Packaging	Current - Quiescent (Max)	Voltage - Supply	Max Propagation Delay	Operating Temperature	RoHS Status
SN74ACT08DRE4	Texas Instruments	Discontinued at DiGi Electronics	14-SOIC	2 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
SN74ACT08DR	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	2 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
SN74ACT08DRG3	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	2 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
SN74ACT08IDREP	Texas Instruments	Active	Tape & Reel (TR)	2 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
74ACT08SC	onsemi	Active	Tube	4 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
MC74ACT08DG	onsemi	Active	Tube	4 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
74ACT08SCX	onsemi	Active	Cut Tape (CT) & Digi-Reel®	4 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant
MC74ACT08DR2G	onsemi	Active	Tape & Reel (TR)	4 µA	4.5V ~ 5.5V	9ns @ 5V, 50pF	-40°C ~ 85°C	ROHS3 Compliant

Engineering Selection Recommendations

For direct replacement of the discontinued SN74ACT08DRE4, the Texas Instruments parametric equivalents SN74ACT08DR, SN74ACT08DRG3, and SN74ACT08IDREP are preferred selections. These parts maintain identical electrical specifications and quiescent current characteristics (2 µA maximum) while offering active product status and established supply availability.

The onsemi alternatives (74ACT08SC, MC74ACT08DG, 74ACT08SCX, MC74ACT08DR2G) are functionally equivalent substitutes with manufacturer recommendation status. These parts operate within the same voltage and temperature ranges with identical propagation delay performance. The quiescent current specification of 4 µA maximum for onsemi variants remains within acceptable operating margins for standard logic applications and does not affect functional compatibility.

All substitute parts maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT08DR be used as a direct replacement for SN74ACT08DRE4?

A: Yes. SN74ACT08DR is a parametric equivalent with identical electrical specifications, including quiescent current (2 µA), propagation delay (9ns @ 5V, 50pF), and operating temperature range (-40°C ~ 85°C). The difference is packaging format: SN74ACT08DR is supplied in Cut Tape and Digi-Reel formats rather than the original tube packaging.

Q: What is the difference between Texas Instruments and onsemi 74ACT08 variants?

A: Both manufacturers produce functionally equivalent 74ACT08 logic gates with identical logic operation, voltage supply range, propagation delay, and package form factor. The primary difference is quiescent current specification: Texas Instruments variants specify 2 µA maximum, while onsemi variants specify 4 µA maximum. Both values are within acceptable operating margins for standard digital logic applications.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tube, Cut Tape, Digi-Reel, Tape & Reel) affects only handling, storage, and assembly processes. Electrical performance and functional characteristics remain identical across all packaging options for the same base part number.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating, meeting standard environmental and regulatory requirements for electronic component manufacturing and deployment.

Q: Can onsemi 74ACT08 parts be mixed with Texas Instruments parts in the same circuit?

A: Yes. Both manufacturers' 74ACT08 variants operate within identical voltage supply ranges (4.5V ~ 5.5V), input/output logic levels, and propagation delay specifications. The 2 µA versus 4 µA quiescent current difference does not affect functional compatibility or circuit operation.

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