SN74AC32DRG4 Equivalent & Substitute Parts

Part Overview

The SN74AC32DRG4 is a 4-channel OR 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 maintenance applications. The 74AC32 logic family provides standard OR gate functionality across multiple manufacturers and packaging options, enabling direct substitution based on electrical and mechanical parameter alignment.

Key Parameters

Parameter	Value
Logic Type	OR 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 SN74AC32DRG4 is determined by strict alignment of the following parameters:

Logic Type: OR Gate (4-channel, 2-input configuration)
Package: 14-SOIC surface mount form factor
Voltage Supply: 2V ~ 6V operating range
Quiescent Current: Maximum 2 µA (or equivalent specification)
Output Current: 24mA high and low
Propagation Delay: 7.5ns @ 5V, 50pF
Operating Temperature: -40°C ~ 85°C
RoHS3 Compliance and MSL Level 1

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional and physical compatibility in circuit applications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Quiescent Current (Max)	Packaging	Inventory
SN74AC32DRG4	Texas Instruments	Obsolete	2 µA	14-SOIC	691 Pcs
SN74AC32DR	Texas Instruments	Active	2 µA	14-SOIC	5038 Pcs
MC74AC32DG	onsemi	Active	4 µA	14-SOIC	4321 Pcs
74AC32SCX	onsemi	Active	2 µA	14-SOIC	18786 Pcs
MC74AC32DR2G	onsemi	Active	4 µA	14-SOIC	1560 Pcs
NLV74AC32DR2G	onsemi	Obsolete	4 µA	14-SOIC	980 Pcs

Engineering Selection Recommendations

Primary Recommendation: SN74AC32DR (Texas Instruments)

The SN74AC32DR is the direct active-status equivalent from the original manufacturer. It maintains identical quiescent current specification (2 µA) and is available in high inventory (5038 pcs). This part is recommended for applications requiring exact parameter matching and manufacturer continuity.

Secondary Recommendation: 74AC32SCX (onsemi)

The 74AC32SCX provides the highest inventory availability (18786 pcs) with matching quiescent current specification (2 µA) and active product status. This part is suitable for high-volume production requirements.

Alternative Options: MC74AC32DG and MC74AC32DR2G (onsemi)

Both onsemi parts are active-status alternatives with quiescent current specification of 4 µA, which remains within acceptable operating parameters for most applications. These parts are suitable when primary recommendations are unavailable.

Avoid: NLV74AC32DR2G (onsemi)

This part carries obsolete product status and should not be selected for new designs or long-term production planning, despite AEC-Q100 automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can I substitute SN74AC32DRG4 with SN74AC32DR?

A: Yes. Both parts are Texas Instruments 74AC32 logic gates with identical electrical specifications, including 2 µA quiescent current and 7.5ns propagation delay. The primary difference is packaging format (DRG4 is tube; DR is tape and reel). Both use 14-SOIC surface mount packaging.

Q: What is the difference between 2 µA and 4 µA quiescent current specifications?

A: The quiescent current difference between SN74AC32DR (2 µA) and MC74AC32DG or MC74AC32DR2G (4 µA) represents a minor variation within the 74AC32 logic family. Both specifications are within acceptable operating parameters and do not affect functional compatibility in standard applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original SN74AC32DRG4 specifications.

Q: What packaging formats are available for 74AC32 substitutes?

A: Substitute parts are available in multiple packaging formats: Tube (MC74AC32DG), Cut Tape & Digi-Reel (SN74AC32DR, 74AC32SCX, MC74AC32DR2G), and Tape & Reel (NLV74AC32DR2G). All use identical 14-SOIC (0.154", 3.90mm Width) surface mount form factor.

Q: Is NLV74AC32DR2G suitable for new designs?

A: No. NLV74AC32DR2G carries obsolete product status and should not be selected for new designs. However, it includes AEC-Q100 automotive qualification if legacy automotive applications require this certification.

Q: Which substitute offers the best inventory availability?

A: 74AC32SCX (onsemi) offers the highest inventory availability at 18786 pcs, making it the optimal choice for high-volume production requirements.

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