SN74ACT32DRG4 Equivalent & Substitute Parts

Part Overview

The SN74ACT32DRG4 is a 4-channel OR 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 design and production requirements. The 74ACT32 logic family provides standard OR gate functionality with ACT-level speed and power characteristics suitable for digital logic applications requiring 4.5V to 5.5V supply operation.

Key Parameters

Parameter	Value
Logic Type	OR 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 SN74ACT32DRG4 is determined by strict equivalence across the following critical parameters:

Logic function: 4-channel OR gate with 2 inputs per channel
Electrical specifications: 4.5V to 5.5V supply voltage, 9ns maximum propagation delay at 5V with 50pF load, 24mA output drive capability
Package compatibility: 14-SOIC surface mount form factor with identical pin configuration
Environmental compliance: ROHS3 compliance, MSL Level 1, REACH unaffected status

Substitute parts are classified into two categories:

MFR Recommended Substitutes maintain identical or superior electrical performance with active product status and full manufacturer support.

Parametric Equivalents meet all functional and electrical requirements with minor variations in quiescent current (up to 4 µA) that do not affect circuit operation within specified parameters.

Parameter Comparison

Part Number	Manufacturer	Product Status	Logic Type	Circuits / Inputs	Supply Voltage	Quiescent Current (Max)	Output Drive	Propagation Delay	Package	Inventory Status
SN74ACT32DRG4	Texas Instruments	Discontinued	OR Gate	4 / 2	4.5V ~ 5.5V	2 µA	24mA, 24mA	9ns @ 5V, 50pF	14-SOIC	4098 Pcs
SN74ACT32DR	Texas Instruments	Active	OR Gate	4 / 2	4.5V ~ 5.5V	2 µA	24mA, 24mA	9ns @ 5V, 50pF	14-SOIC	7144 Pcs
MC74ACT32DG	onsemi	Active	OR Gate	4 / 2	4.5V ~ 5.5V	4 µA	24mA, 24mA	9ns @ 5V, 50pF	14-SOIC	2356 Pcs
MC74ACT32DR2G	onsemi	Active	OR Gate	4 / 2	4.5V ~ 5.5V	4 µA	24mA, 24mA	9ns @ 5V, 50pF	14-SOIC	1698 Pcs
74ACT32SC	Fairchild Semiconductor	Active	OR Gate	4 / 2	4.5V ~ 5.5V	Not specified	Not specified	Not specified	14-SOIC	2800 Pcs
74ACT32SCX	Fairchild Semiconductor	Active	OR Gate	4 / 2	4.5V ~ 5.5V	4 µA	24mA, 24mA	9ns @ 5V, 50pF	14-SOIC	48707 Pcs

Engineering Selection Recommendations

Primary Substitute: SN74ACT32DR (Texas Instruments)

The SN74ACT32DR is the direct MFR recommended substitute with identical electrical specifications to the SN74ACT32DRG4. This part maintains the same 2 µA quiescent current specification and is currently in active production status with higher inventory availability (7144 units). The part is ROHS3 compliant and carries the same environmental certifications. Selection of this part eliminates any cross-manufacturer compatibility considerations.

Secondary Substitutes: MC74ACT32DG and MC74ACT32DR2G (onsemi)

Both onsemi parts meet all functional and electrical requirements with a maximum quiescent current specification of 4 µA, which remains within acceptable operating parameters for 74ACT logic applications. Both parts are active products with ROHS3 compliance and MSL Level 1 rating. The MC74ACT32DG is supplied in tube packaging, while the MC74ACT32DR2G is supplied in cut tape format. Selection between these parts depends on packaging and handling requirements for production workflows.

Tertiary Substitutes: 74ACT32SC and 74ACT32SCX (Fairchild Semiconductor)

Both Fairchild parts are active products with confirmed 4-channel, 2-input OR gate functionality in 14-SOIC packaging. The 74ACT32SCX provides complete electrical specification alignment with 4 µA quiescent current and 9ns propagation delay. The 74ACT32SC has limited specification data but maintains the same base product number and logic family. The 74ACT32SCX offers the highest inventory availability (48707 units) among all substitutes.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT32DR be used as a direct replacement for the SN74ACT32DRG4?

A: Yes. The SN74ACT32DR is the MFR recommended substitute with identical electrical specifications, package configuration, and pin assignment. No circuit modifications are required.

Q: What is the difference between the onsemi MC74ACT32DG and MC74ACT32DR2G?

A: Both parts are electrically identical 4-channel OR gates with 14-SOIC packaging. The primary difference is packaging format: MC74ACT32DG is supplied in tube packaging, while MC74ACT32DR2G is supplied in cut tape with Digi-Reel format. Selection depends on production assembly requirements and handling procedures.

Q: Are there any performance differences between Texas Instruments and onsemi versions?

A: The Texas Instruments SN74ACT32DR specifies 2 µA maximum quiescent current, while onsemi parts (MC74ACT32DG and MC74ACT32DR2G) specify 4 µA maximum. Both values are within 74ACT logic family standards. Propagation delay, output drive capability, and input logic levels are identical across all active substitutes.

Q: Is the Fairchild 74ACT32SCX a suitable replacement?

A: Yes. The 74ACT32SCX meets all functional and electrical requirements with 4 µA quiescent current, 9ns propagation delay, and 14-SOIC packaging. It is an active product with ROHS3 compliance and offers the highest inventory availability among all substitutes.

Q: What packaging options are available for these substitutes?

A: SN74ACT32DR is available in cut tape and Digi-Reel format. MC74ACT32DG is supplied in tube packaging. MC74ACT32DR2G is supplied in cut tape and Digi-Reel format. 74ACT32SC and 74ACT32SCX packaging formats are not fully specified in available data. Confirm packaging requirements with your procurement process before final selection.

Q: Are all substitutes ROHS3 compliant?

A: SN74ACT32DR, MC74ACT32DG, MC74ACT32DR2G, and 74ACT32SCX are confirmed ROHS3 compliant. The 74ACT32SC compliance status is not specified in available data. Verify compliance documentation with the supplier if this is a requirement for your application.

Q: Can I mix different manufacturers in the same production run?

A: All substitutes are functionally and electrically equivalent within specified parameters. Cross-manufacturer substitution is permissible from an engineering standpoint. However, verify your quality assurance and procurement policies regarding multi-source component usage in production.

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