SN74AC32D Equivalent & Substitute Parts

Part Overview

The SN74AC32D is a 4-channel 2-input OR gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement. The device operates across a 2V to 6V supply voltage range with low quiescent current and standard propagation delay characteristics suitable for general-purpose logic applications.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	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 @ 5V, 50pF	7.5ns
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 for the SN74AC32D is determined by strict equivalence across the following critical parameters: logic type (OR gate), circuit count (4 channels), input count (2 inputs per channel), package type (14-SOIC), supply voltage range (2V ~ 6V), output current capability (24mA), propagation delay (7.5ns @ 5V, 50pF), operating temperature range (-40°C ~ 85°C), and compliance certifications (ROHS3, REACH Unaffected).

Substitute parts are grouped into two categories:

Direct Manufacturer Substitutes maintain identical electrical specifications and differ only in packaging format (tape & reel versus tube) or quiescent current within acceptable tolerance.

Parametric Equivalents provide identical functional performance and electrical characteristics but may originate from alternative manufacturers while maintaining full compatibility with the original design.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Circuits / Inputs	Supply Voltage	Quiescent Current (Max)	Output Current (H/L)	Propagation Delay	Package	Packaging Format	Product Status
SN74AC32D	Texas Instruments	OR Gate	4 / 2	2V ~ 6V	2 µA	24mA, 24mA	7.5ns @ 5V, 50pF	14-SOIC	Tube	Discontinued
SN74AC32DR	Texas Instruments	OR Gate	4 / 2	2V ~ 6V	2 µA	24mA, 24mA	7.5ns @ 5V, 50pF	14-SOIC	Tape & Reel	Active
74AC32SCX	onsemi	OR Gate	4 / 2	2V ~ 6V	2 µA	24mA, 24mA	7.5ns @ 5V, 50pF	14-SOIC	Cut Tape & Digi-Reel	Active
MC74AC32DR2G	onsemi	OR Gate	4 / 2	2V ~ 6V	4 µA	24mA, 24mA	7.5ns @ 5V, 50pF	14-SOIC	Cut Tape & Digi-Reel	Active
MC74AC32DG	onsemi	OR Gate	4 / 2	2V ~ 6V	4 µA	24mA, 24mA	7.5ns @ 5V, 50pF	14-SOIC	Tube	Active

Engineering Selection Recommendations

SN74AC32DR is the primary direct substitute for the SN74AC32D. Both are Texas Instruments products with identical electrical specifications and differ only in packaging format (tape & reel versus tube). This part maintains active product status and full ROHS3 compliance.

74AC32SCX (onsemi) and MC74AC32DR2G (onsemi) are direct functional equivalents with active status. The 74AC32SCX maintains the original 2 µA quiescent current specification. The MC74AC32DR2G exhibits 4 µA quiescent current, which remains within acceptable operating parameters for most applications but should be verified in power-sensitive designs.

MC74AC32DG (onsemi) is a parametric equivalent available in tube packaging with 4 µA quiescent current and active product status. This option is suitable when tube format is required and the higher quiescent current is acceptable.

All substitute parts maintain identical 14-SOIC package dimensions, supply voltage range, output current capability, propagation delay, operating temperature range, and compliance certifications (ROHS3, REACH Unaffected, MSL 1).

Frequently Asked Questions (FAQ)

Q: Can I use SN74AC32DR as a direct replacement for SN74AC32D?

A: Yes. SN74AC32DR is a direct substitute manufactured by Texas Instruments with identical electrical specifications. The only difference is packaging format: SN74AC32DR uses tape & reel format while SN74AC32D uses tube format. Both are 14-SOIC surface mount packages with identical pinout and performance characteristics.

Q: What is the difference between the Texas Instruments and onsemi versions?

A: Both manufacturers produce functionally equivalent 74AC32 logic gates with identical logic type, circuit count, input count, package type, supply voltage range, output current, propagation delay, and operating temperature. The primary differences are manufacturer origin and, in some cases, quiescent current specification (2 µA versus 4 µA). All versions maintain ROHS3 compliance and MSL 1 rating.

Q: Does the higher quiescent current in MC74AC32DR2G and MC74AC32DG affect circuit performance?

A: The MC74AC32DR2G and MC74AC32DG specify 4 µA maximum quiescent current compared to 2 µA in the original SN74AC32D. This difference is typically negligible in most applications. However, in power-sensitive or battery-powered designs where quiescent current is critical, the original 2 µA specification (SN74AC32DR or 74AC32SCX) should be verified for compatibility.

Q: Are all substitute parts available in 14-SOIC packaging?

A: Yes. All listed substitute parts use the 14-SOIC (0.154", 3.90mm Width) surface mount package with identical pinout and mechanical dimensions. Packaging format (tube, tape & reel, or cut tape) varies by part number but does not affect electrical compatibility or PCB assembly.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts listed maintain ROHS3 compliance, REACH Unaffected status, MSL 1 (Unlimited) moisture sensitivity level, and identical ECCN and HTSUS classifications. These certifications ensure regulatory and environmental compliance across all substitutes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message