SN74ACT32PW Equivalent & Substitute Parts

Part Overview

The SN74ACT32PW is a 4-channel 2-input OR gate logic IC manufactured by Texas Instruments in a 14-TSSOP surface mount package. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The 74ACT32 logic family provides standard OR gate functionality across multiple manufacturers, with several active alternatives available that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	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	9ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C
Package Type	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74ACT32PW is determined by strict adherence to the following criteria:

Primary Substitution Parameters:

Logic type: OR Gate
Circuit count: 4 channels
Input count: 2 per channel
Package: 14-TSSOP surface mount
Supply voltage range: 4.5V ~ 5.5V
Operating temperature: -40°C ~ 85°C
Input/output logic levels and thresholds
Propagation delay: 9ns @ 5V, 50pF

Acceptable Variations:

Quiescent current up to 4 µA (original specifies 2 µA maximum)
Packaging format (Tube, Cut Tape, Tape & Reel, Bulk)
Manufacturer (Texas Instruments, Fairchild Semiconductor, onsemi)
Product status (Active or Discontinued)

All substitute parts listed maintain identical functional specifications and package dimensions, ensuring direct pin-for-pin compatibility in 14-TSSOP footprints.

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Quiescent Current (Max)	Inventory
SN74ACT32PW	Texas Instruments	Discontinued	Tube	2 µA	1266 Pcs
SN74ACT32PWR	Texas Instruments	Active	Cut Tape & Digi-Reel	2 µA	2887 Pcs
74ACT32MTCX	Fairchild Semiconductor	Active	Not Specified	4 µA	1660 Pcs
MC74ACT32DTR2G	onsemi	Active	Tape & Reel	4 µA	2800 Pcs
74ACT32MTC	Fairchild Semiconductor	Active	Bulk	4 µA	5700 Pcs

Engineering Selection Recommendations

Primary Recommendation: SN74ACT32PWR This Texas Instruments part maintains identical quiescent current specifications (2 µA) to the original SN74ACT32PW while offering Active product status. It is ROHS3 compliant with unlimited MSL rating. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tube), which does not affect electrical performance or PCB assembly compatibility.

Secondary Recommendations: MC74ACT32DTR2G and 74ACT32MTC Both parts are manufactured by established suppliers (onsemi and Fairchild Semiconductor respectively) with Active product status. These parts specify 4 µA maximum quiescent current, which remains within acceptable operating parameters for the 74ACT32 logic family. MC74ACT32DTR2G is supplied in Tape & Reel format suitable for automated assembly. 74ACT32MTC is available in Bulk packaging with the highest inventory level (5700 Pcs).

Tertiary Recommendation: 74ACT32MTCX Fairchild Semiconductor part with Active status and 4 µA quiescent current specification. Suitable for applications where packaging format is not a constraint.

All recommended substitutes are ROHS3 compliant and maintain the same 14-TSSOP package footprint, ensuring direct compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT32PWR directly replace SN74ACT32PW? A: Yes. Both parts are Texas Instruments 74ACT32 OR gate ICs in 14-TSSOP packages with identical electrical specifications. The only difference is packaging format (Cut Tape & Digi-Reel versus Tube). Pin configuration and functional performance are identical.

Q: What is the significance of the quiescent current difference between 2 µA and 4 µA? A: The original SN74ACT32PW specifies 2 µA maximum quiescent current. Substitute parts from Fairchild Semiconductor and onsemi specify 4 µA maximum. Both values are within the 74ACT32 logic family standard and do not affect circuit functionality. The difference represents acceptable manufacturing variation within the product family.

Q: Are all substitute parts RoHS compliant? A: SN74ACT32PWR, MC74ACT32DTR2G, and 74ACT32MTC are explicitly listed as ROHS3 compliant. 74ACT32MTCX does not specify RoHS status in the provided data. Verify RoHS compliance requirements for your specific application before selection.

Q: What packaging formats are available? A: SN74ACT32PWR is supplied in Cut Tape & Digi-Reel format. MC74ACT32DTR2G is supplied in Tape & Reel format. 74ACT32MTC is supplied in Bulk format. All are suitable for surface mount assembly with appropriate handling equipment.

Q: Which substitute has the highest inventory availability? A: 74ACT32MTC (Fairchild Semiconductor) has the highest inventory at 5700 Pcs. MC74ACT32DTR2G (onsemi) has 2800 Pcs available. SN74ACT32PWR (Texas Instruments) has 2887 Pcs available.

Q: Are there any temperature or voltage operating differences? A: No. All substitute parts operate across the identical temperature range (-40°C ~ 85°C) and supply voltage range (4.5V ~ 5.5V). Input logic levels, output current ratings, and propagation delay specifications are identical across all parts.

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