74ACTQ32SJ OR Gate IC Equivalent & Substitute Parts

Part Overview

The 74ACTQ32SJ is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-SOP surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74ACTQ32SJ operates within a 4.5V to 5.5V supply voltage range and is suitable for standard TTL-compatible logic applications requiring OR gate functionality.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	4.5V ~ 5.5V
Current - Output High, Low	24mA, 24mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm Width)

Substitute Part Grouping Explanation

Substitution for the 74ACTQ32SJ is determined by the following criteria:

Primary Substitution Criteria:

Logic type: OR Gate
Circuit count: 4 channels
Input count: 2 inputs per channel
Supply voltage compatibility: 4.5V ~ 5.5V
Output drive capability: 24mA minimum
Input logic levels: Low ≤ 0.8V, High ≥ 2V
Operating temperature range: -40°C ~ 85°C minimum
Mounting type: Surface Mount
Package compatibility: 14-SOIC or 14-SOP

Substitute parts are grouped into two categories:

Category A - Direct Functional Equivalents (74ACT Series): Parts maintaining identical electrical specifications and 5V supply operation. These include CD74ACT32M, CD74ACT32M96, SN74ACT32D, SN74ACT32DG4, SN74ACT32DR, and SN74ACT32NSR. All maintain 4-channel 2-input OR gate configuration with 24mA output drive and compatible input/output logic levels.

Category B - Extended Voltage Range Alternative (74ALVC Series): SN74ALVC32NSR operates at reduced supply voltage (1.65V ~ 3.6V) and is not recommended as a direct substitute due to incompatible supply voltage specifications.

Parameter Comparison

Parameter	74ACTQ32SJ	CD74ACT32M	CD74ACT32M96	SN74ACT32D	SN74ACT32DG4	SN74ACT32DR	SN74ACT32NSR
Manufacturer	onsemi	Harris Corporation	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	OR Gate	OR Gate	OR Gate	OR Gate	OR Gate	OR Gate	OR Gate
Number of Circuits	4	4	4	4	4	4	4
Number of Inputs	2	2	2	2	2	2	2
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	1.65V ~ 3.6V
Current - Quiescent (Max)	2 µA	4 µA	4 µA	2 µA	2 µA	2 µA	10 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Input Logic Level - Low	0.8V	0.8V	0.8V	0.8V	0.8V	0.8V	0.7V ~ 0.8V
Input Logic Level - High	2V	2V	2V	2V	2V	2V	1.7V ~ 2V
Max Propagation Delay @ V, Max CL	6.5ns @ 5V, 50pF	12.1ns @ 5V, 50pF	12.1ns @ 5V, 50pF	9ns @ 5V, 50pF	9ns @ 5V, 50pF	9ns @ 5V, 50pF	2.8ns @ 3.3V, 50pF
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.209", 5.30mm Width)
Product Status	Obsolete	Obsolete	Active	Discontinued at DiGi Electronics	Discontinued at DiGi Electronics	Active	Active
RoHS Status	REACH Unaffected	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Recommended Primary Substitutes:

SN74ACT32DR and SN74ACT32NSR are the preferred substitutes for the 74ACTQ32SJ. Both are manufactured by Texas Instruments, maintain active product status, and comply with ROHS3 standards. SN74ACT32DR is available in cut tape and digi-reel packaging with 7,144 units in stock. SN74ACT32NSR is available in tape and reel packaging with 756 units in stock. Both parts maintain identical electrical specifications including 4.5V to 5.5V supply voltage, 24mA output drive, and -40°C to 85°C operating temperature range.

Secondary Substitutes:

CD74ACT32M96 (Texas Instruments, active status, ROHS3 compliant) provides functional equivalence with 2,900 units in stock. SN74ACT32D (Texas Instruments, discontinued at DiGi Electronics, ROHS3 compliant) offers electrical compatibility with 3,840 units in stock. SN74ACT32DG4 (Texas Instruments, discontinued at DiGi Electronics, ROHS3 compliant) maintains full electrical equivalence with 846 units in stock.

Not Recommended:

SN74ALVC32NSR operates at 1.65V to 3.6V supply voltage and is not compatible with the 74ACTQ32SJ's 4.5V to 5.5V specification. CD74ACT32M (Harris Corporation, obsolete, RoHS non-compliant) is not recommended due to product status and compliance limitations.

Package Consideration:

The 74ACTQ32SJ uses 14-SOIC (0.209", 5.30mm width) packaging. Most substitute parts use 14-SOIC (0.154", 3.90mm width) packaging. SN74ACT32NSR maintains the original 14-SOIC (0.209", 5.30mm width) package, making it the optimal choice for direct board-level replacement without PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can I use SN74ACT32DR as a direct replacement for 74ACTQ32SJ?

A: Yes. SN74ACT32DR maintains identical electrical specifications including 4-channel 2-input OR gate configuration, 4.5V to 5.5V supply voltage, 24mA output drive, and -40°C to 85°C operating temperature. The primary difference is package width (0.154" vs 0.209"), which may require PCB layout adjustment.

Q: What is the difference between SN74ACT32DR and SN74ACT32NSR?

A: Both parts are electrically identical. SN74ACT32DR is supplied in cut tape and digi-reel packaging, while SN74ACT32NSR is supplied in tape and reel packaging. SN74ACT32NSR maintains the original 14-SOIC (0.209", 5.30mm width) package, making it suitable for direct board replacement without layout modification.

Q: Why is SN74ALVC32NSR not recommended as a substitute?

A: SN74ALVC32NSR operates at 1.65V to 3.6V supply voltage, which is incompatible with the 74ACTQ32SJ's 4.5V to 5.5V specification. Using this part would require complete circuit redesign and is not a valid substitute.

Q: Are there any compliance concerns with substitute parts?

A: CD74ACT32M is RoHS non-compliant and should not be used in new designs. All other recommended substitutes (SN74ACT32DR, SN74ACT32NSR, CD74ACT32M96, SN74ACT32D, SN74ACT32DG4) are ROHS3 compliant and REACH unaffected.

Q: What is the propagation delay difference between the 74ACTQ32SJ and substitute parts?

A: The 74ACTQ32SJ has a maximum propagation delay of 6.5ns at 5V with 50pF load. SN74ACT32DR, SN74ACT32NSR, SN74ACT32D, and SN74ACT32DG4 have 9ns propagation delay. CD74ACT32M and CD74ACT32M96 have 12.1ns propagation delay. These differences are within typical TTL logic tolerances for most applications.

Q: Which substitute has the best current availability?

A: SN74ACT32DR has the highest inventory with 7,144 units in stock, followed by CD74ACT32M96 with 2,900 units and SN74ACT32D with 3,840 units. All recommended substitutes maintain active or recently discontinued status with adequate supply.

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