SN74AHCT32PW Equivalent & Substitute Parts

Part Overview

The SN74AHCT32PW is a 4-channel 2-input OR gate logic IC manufactured by Texas Instruments in a 14-TSSOP surface mount package. This part is currently discontinued at DiGi Electronics, with 3,986 units available in new original stock. The SN74AHCT32PW operates within a 4.5V to 5.5V supply voltage range and is designed for standard logic applications requiring OR gate functionality. Due to its discontinued status, equivalent substitute parts from active manufacturers are necessary for ongoing production and design continuity.

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	8mA, 8mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	7.9ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN74AHCT32PW is determined by the following critical parameters:

Logic Type: OR Gate with 4 channels and 2 inputs per channel
Package Type: 14-TSSOP surface mount package
Voltage Supply Range: 4.5V ~ 5.5V nominal operation
Output Drive Capability: 8mA high and low
Propagation Delay: 7.9ns @ 5V, 50pF
RoHS3 Compliance and MSL Level 1

Substitute parts must maintain identical logic functionality, pin configuration, and electrical performance within the specified voltage and temperature operating ranges. Parts are grouped by manufacturer and product status (active vs. discontinued), with variants available in different packaging formats (tube, cut tape, tape & reel, bulk).

Parameter Comparison

Part Number	Manufacturer	Product Status	Logic Type	Circuits / Inputs	Voltage Supply	Quiescent Current (Max)	Output Current	Propagation Delay	Operating Temp	Package	Packaging Format
SN74AHCT32PW	Texas Instruments	Discontinued	OR Gate	4 / 2	4.5V ~ 5.5V	2 µA	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 85°C	14-TSSOP	Tube
SN74AHCT32PWR	Texas Instruments	Active	OR Gate	4 / 2	4.5V ~ 5.5V	2 µA	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 85°C	14-TSSOP	Cut Tape & Digi-Reel
74AHCT32PW,118	NXP Semiconductors	Active	OR Gate	4 / 2	4.5V ~ 5.5V	Not specified	Not specified	Not specified	Not specified	14-TSSOP	Bulk
74AHCT32PW-Q100J	Nexperia USA Inc.	Active	OR Gate	4 / 2	4.5V ~ 5.5V	2 µA	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	14-TSSOP	Tape & Reel
74VHCT32PW,118	Nexperia USA Inc.	Active	OR Gate	4 / 2	4.5V ~ 5.5V	2 µA	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	14-TSSOP	Tape & Reel
74AHCT32T14-13	Diodes Incorporated	Active	OR Gate	4 / 2	4.5V ~ 5.5V	20 µA	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	14-TSSOP	Tape & Reel
74VHCT32PW-Q100J	Nexperia USA Inc.	Active	OR Gate	4 / 2	4.5V ~ 5.5V	2 µA	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	14-TSSOP	Tape & Reel
MC74VHCT32ADTR2G	onsemi	Active	OR Gate	4 / 2	2V ~ 5.5V	2 µA	8mA, 8mA	7.5ns @ 5V, 50pF	-55°C ~ 125°C	14-TSSOP	Tape & Reel

Engineering Selection Recommendations

Direct Replacement (Texas Instruments): SN74AHCT32PWR is the active equivalent from the original manufacturer. It maintains identical electrical specifications and operating temperature range (-40°C ~ 85°C) as the discontinued SN74AHCT32PW, with the only difference being packaging format (Cut Tape & Digi-Reel versus Tube). This part is recommended for designs requiring continuity with the original specification.

Extended Temperature Range Alternatives: Parts 74AHCT32PW-Q100J, 74VHCT32PW,118, 74VHCT32PW-Q100J, and MC74VHCT32ADTR2G extend the operating temperature range to -40°C ~ 125°C. The 74AHCT32PW-Q100J and 74VHCT32PW-Q100J include AEC-Q100 automotive qualification. These are suitable for applications requiring enhanced temperature performance or automotive-grade reliability.

Quiescent Current Consideration: The 74AHCT32T14-13 from Diodes Incorporated specifies a maximum quiescent current of 20 µA, compared to 2 µA for other substitutes. This higher quiescent current may impact power consumption in battery-operated or low-power applications.

Voltage Range Extension: The MC74VHCT32ADTR2G from onsemi operates across a wider supply voltage range (2V ~ 5.5V) compared to the standard 4.5V ~ 5.5V range, providing flexibility for lower-voltage system designs.

RoHS3 Compliance: All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can SN74AHCT32PWR be used as a direct replacement for SN74AHCT32PW?

A: Yes. SN74AHCT32PWR is electrically and functionally identical to SN74AHCT32PW. Both are manufactured by Texas Instruments with the same logic specifications, voltage supply range, and operating temperature. The difference is packaging format: SN74AHCT32PWR is supplied in Cut Tape & Digi-Reel format instead of Tube.

Q: What is the difference between 74AHCT32 and 74VHCT32 series parts?

A: Both series provide 4-channel 2-input OR gate functionality in the 14-TSSOP package with identical electrical performance at 5V operation. The 74VHCT32 series extends the operating temperature range to -40°C ~ 125°C, compared to -40°C ~ 85°C for standard 74AHCT32 parts. The 74VHCT32 series also supports a wider supply voltage range in some variants.

Q: Is the MC74VHCT32ADTR2G compatible with the SN74AHCT32PW?

A: Yes, for applications operating within the 4.5V ~ 5.5V range. The MC74VHCT32ADTR2G maintains identical logic functionality and pin configuration. It offers extended operating temperature (-55°C ~ 125°C) and wider supply voltage support (2V ~ 5.5V). Propagation delay is slightly faster at 7.5ns versus 7.9ns.

Q: What does AEC-Q100 qualification mean?

A: AEC-Q100 is an automotive industry standard qualification indicating the part meets reliability and quality requirements for automotive applications. Parts 74AHCT32PW-Q100J and 74VHCT32PW-Q100J carry this qualification, making them suitable for automotive-grade designs.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tube, Cut Tape, Tape & Reel, Bulk) affects handling, storage, and assembly processes but does not alter electrical specifications or performance. Selection should be based on manufacturing equipment compatibility and supply chain requirements.

Q: Can I use 74AHCT32T14-13 in a low-power application?

A: The 74AHCT32T14-13 has a maximum quiescent current of 20 µA, which is 10 times higher than other substitutes (2 µA). For battery-powered or ultra-low-power designs, alternatives with 2 µA quiescent current are preferred.

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