SN74HC32DR Equivalent & Substitute Parts

Part Overview

The SN74HC32DR is a 4-channel 2-input OR gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This part is currently active in production with 5,828 units in stock. The SN74HC32DR serves as a fundamental building block in digital logic circuits requiring OR gate functionality across multiple channels. Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when sourcing from multiple manufacturers is needed for supply chain resilience.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	2V to 6V
Current - Quiescent (Max)	2 µA
Current - Output High/Low	5.2mA / 5.2mA
Input Logic Level - Low	0.5V to 1.8V
Input Logic Level - High	1.5V to 4.2V
Max Propagation Delay @ 6V, 50pF	17ns
Operating Temperature	-40°C to 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74HC32DR are classified based on strict parametric equivalence. All substitute parts must maintain the following core parameters: 4-channel 2-input OR gate logic function, 2V to 6V supply voltage range, 14-SOIC package format, surface mount mounting type, and ROHS3 compliance. Substitutes are grouped into three categories:

Parametric Equivalents maintain identical electrical specifications including quiescent current, output current, propagation delay, and operating temperature range. These parts are direct functional replacements with no design modifications required.

Direct Manufacturer Equivalents meet all core electrical parameters but may have minor variations in quiescent current, propagation delay, or operating temperature range that remain within acceptable design tolerances. These parts are suitable for applications where the primary part is unavailable.

Manufacturer Recommended Alternatives are designated by manufacturers as approved substitutes and include parts with extended temperature ranges or alternative packaging formats that maintain electrical compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Quiescent Current (Max)	Propagation Delay @ 6V, 50pF	Operating Temperature	Package	Packaging Format
SN74HC32DR	Texas Instruments	Active	2 µA	17ns	-40°C to 85°C	14-SOIC	Cut Tape & Digi-Reel
SN74HC32DT	Texas Instruments	Discontinued at DiGi Electronics	2 µA	17ns	-40°C to 85°C	14-SOIC	Cut Tape & Digi-Reel
74HC32S14-13	Diodes Incorporated	Active	20 µA	15ns	-40°C to 125°C	14-SOIC	Tape & Reel
MC74HC32ADR2G	onsemi	Active	1 µA	13ns	-55°C to 125°C	14-SOIC	Cut Tape & Digi-Reel
MM74HC32M	Fairchild Semiconductor	Active	2 µA	17ns	-40°C to 85°C	14-SOIC	Tube
74HC32D,653	Nexperia USA Inc.	Active	2 µA	15ns	-40°C to 125°C	14-SOIC	Cut Tape & Digi-Reel
MC74HC32ADG	onsemi	Active	1 µA	13ns	-55°C to 125°C	14-SOIC	Tube
NLV74HC32ADR2G	onsemi	Obsolete	1 µA	13ns	-55°C to 125°C	14-SOIC	Cut Tape & Digi-Reel
MM74HC32MX	Fairchild Semiconductor	Active	2 µA	17ns	-40°C to 85°C	14-SOIC	Cut Tape & Digi-Reel

Engineering Selection Recommendations

For Active Production Designs: MC74HC32ADR2G and MC74HC32ADG from onsemi are preferred substitutes. Both parts offer superior electrical performance with lower quiescent current (1 µA vs 2 µA), faster propagation delay (13ns vs 17ns), and extended operating temperature range (-55°C to 125°C vs -40°C to 85°C). These parts are actively manufactured and ROHS3 compliant.

For Standard Temperature Range Applications: 74HC32D,653 from Nexperia USA Inc. and 74HC32S14-13 from Diodes Incorporated are suitable alternatives. Both maintain ROHS3 compliance and offer extended operating temperature to 125°C. The Nexperia part matches the quiescent current specification of the primary part, while the Diodes part offers faster propagation delay (15ns).

For Packaging Format Flexibility: MM74HC32M and MM74HC32MX from Fairchild Semiconductor provide identical electrical specifications to the SN74HC32DR but are supplied in tube packaging rather than cut tape format. These parts are suitable when tube packaging meets procurement requirements.

Parts to Avoid in New Designs: SN74HC32DT is discontinued at DiGi Electronics and NLV74HC32ADR2G is obsolete. While inventory may be available, these parts should not be selected for new production designs.

Frequently Asked Questions (FAQ)

Q: Can MC74HC32ADR2G be used as a direct replacement for SN74HC32DR?

A: Yes. MC74HC32ADR2G is a direct functional replacement. All core parameters match: 4-channel 2-input OR gate, 2V to 6V supply voltage, 14-SOIC package, and surface mount mounting. The onsemi part offers improved performance with lower quiescent current and faster propagation delay. No design modifications are required.

Q: What is the difference between 74HC32S14-13 and SN74HC32DR?

A: Both parts are functionally equivalent 4-channel 2-input OR gates in 14-SOIC packaging. The Diodes Incorporated part (74HC32S14-13) has higher quiescent current (20 µA vs 2 µA) and faster propagation delay (15ns vs 17ns). The extended operating temperature range (-40°C to 125°C) makes it suitable for industrial applications. The higher quiescent current may impact power consumption in battery-powered designs.

Q: Are packaging format differences between Cut Tape, Tube, and Tape & Reel significant for substitution?

A: Packaging format affects procurement and handling but not electrical compatibility. Cut Tape & Digi-Reel format is suitable for automated pick-and-place assembly. Tube packaging is used for manual assembly or lower-volume production. Tape & Reel format is optimized for high-volume manufacturing. Select based on assembly process requirements, not electrical performance.

Q: Why does NLV74HC32ADR2G show as obsolete?

A: NLV74HC32ADR2G is marked obsolete and should not be selected for new designs. Although inventory may be available, manufacturer support and long-term availability cannot be guaranteed. Use active alternatives such as MC74HC32ADR2G instead.

Q: Can I use parts with different operating temperature ranges interchangeably?

A: Operating temperature range substitution depends on application requirements. If your design operates within -40°C to 85°C, any substitute part with this range or wider is acceptable. Parts with extended ranges (-55°C to 125°C) are suitable for all applications but may have higher cost. Do not use parts with narrower temperature ranges than your application requires.

Q: What does ROHS3 compliance mean for this part?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All listed substitute parts are ROHS3 compliant, ensuring compatibility with environmental regulations and procurement standards.

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