SN74AC08DRG4 Equivalent & Substitute Parts

Part Overview

The SN74AC08DRG4 is a 4-channel AND gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design requirements. The 74AC08 series provides standard AND gate functionality across multiple manufacturers, with several active alternatives available that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High/Low	24mA / 24mA
Input Logic Level - Low	0.9V ~ 1.65V
Input Logic Level - High	2.1V ~ 3.85V
Max Propagation Delay	7.5ns @ 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	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74AC08DRG4 is determined by strict equivalence across the following parameters: logic type (AND gate), number of circuits (4), number of inputs per circuit (2), supply voltage range (2V ~ 6V), output current capability (24mA), propagation delay (7.5ns @ 5V, 50pF), operating temperature range (-40°C ~ 85°C), and package type (14-SOIC surface mount).

All substitute parts listed maintain these electrical specifications and physical packaging requirements. Variations in quiescent current (2 µA vs. 4 µA) and packaging format (cut tape, tube, tape & reel) do not affect functional equivalence. All substitutes are from the 74AC08 base product family and comply with ROHS3 and REACH requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Quiescent Current (Max)	Packaging Format	Inventory (Pcs)	RoHS Status
SN74AC08DRG4	Texas Instruments	Obsolete	2 µA	Digi-Reel	864	ROHS3 Compliant
SN74AC08DR	Texas Instruments	Active	2 µA	Cut Tape (CT) & Digi-Reel	4875	ROHS3 Compliant
MC74AC08DG	onsemi	Active	4 µA	Tube	3991	ROHS3 Compliant
74AC08SCX	Fairchild Semiconductor	Active	2 µA	Not specified	300100	Not specified
MC74AC08DR2G	onsemi	Active	4 µA	Tape & Reel (TR)	1130	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring the SN74AC08DRG4, the following selection criteria apply:

Primary Recommendation: SN74AC08DR (Texas Instruments) is the direct active equivalent from the original manufacturer, maintaining identical quiescent current specifications and full ROHS3 compliance. This part is available in cut tape and Digi-Reel formats with substantial inventory.

Alternative from onsemi: MC74AC08DG and MC74AC08DR2G are functionally equivalent alternatives with active product status. These parts feature slightly elevated quiescent current (4 µA vs. 2 µA) but maintain all other electrical parameters. MC74AC08DG is supplied in tube format, while MC74AC08DR2G is supplied in tape & reel format.

Alternative from Fairchild Semiconductor: 74AC08SCX provides parametric equivalence with active product status and the highest available inventory. This part maintains 2 µA quiescent current specification.

All substitutes are surface mount 14-SOIC packages with identical pinout and electrical performance within the specified operating range. Selection should be based on packaging format requirements, inventory availability, and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can SN74AC08DR be used as a direct replacement for SN74AC08DRG4?

A: Yes. SN74AC08DR is a direct parametric equivalent from Texas Instruments with identical electrical specifications, operating temperature range, and 14-SOIC packaging. The primary difference is product status (active vs. obsolete) and packaging format options.

Q: What is the difference between the onsemi parts (MC74AC08DG and MC74AC08DR2G)?

A: Both onsemi parts are functionally equivalent with identical electrical performance. The difference is packaging format: MC74AC08DG is supplied in tube format, while MC74AC08DR2G is supplied in tape & reel format. Both feature 4 µA maximum quiescent current compared to 2 µA in the Texas Instruments versions.

Q: Does the quiescent current difference (2 µA vs. 4 µA) affect compatibility?

A: No. Both specifications fall within acceptable operating parameters for the 74AC08 logic family. The difference does not affect functional equivalence or circuit performance in standard applications.

Q: Are all substitute parts RoHS compliant?

A: SN74AC08DR, MC74AC08DG, and MC74AC08DR2G are ROHS3 compliant. The 74AC08SCX from Fairchild Semiconductor does not specify RoHS status in the provided data.

Q: What packaging formats are available for these substitutes?

A: SN74AC08DR is available in cut tape and Digi-Reel formats. MC74AC08DG is supplied in tube format. MC74AC08DR2G is supplied in tape & reel format. 74AC08SCX packaging format is not specified.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. All substitute parts use identical 14-SOIC surface mount packaging with the same pinout and footprint. They are mechanically and electrically interchangeable.

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