CD74HC32M OR Gate IC Equivalent & Substitute Parts

Part Overview

The CD74HC32M is a 4-channel 2-input OR gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This part is discontinued at DiGi Electronics but remains available through inventory channels. The CD74HC32M operates across a 2V to 6V supply voltage range and is suitable for general-purpose logic applications requiring OR gate functionality. Due to its discontinued status, equivalent substitute parts from active manufacturers are necessary for new designs and ongoing production requirements.

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	15ns
Operating Temperature	-55°C to 125°C
Mounting Type	Surface Mount
Package	14-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC32M is determined by the following criteria:

Electrical Parameters (Must Match):

Logic Type: OR Gate
Number of Circuits: 4
Number of Inputs: 2
Voltage Supply Range: 2V to 6V minimum
Input Logic Levels: 0.5V to 1.8V (Low), 1.5V to 4.2V (High)
Output Current: 5.2mA minimum for both High and Low states
Propagation Delay: 15ns or faster at 6V, 50pF load

Mechanical Parameters (Must Match):

Mounting Type: Surface Mount
Package: 14-SOIC or 14-SO (functionally equivalent)
Package Width: 0.154" (3.90mm)

Compliance Parameters:

RoHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts meeting all electrical and mechanical criteria are listed below, regardless of manufacturer or product status. Parts with Active status are preferred for new designs; Obsolete or Discontinued parts are suitable only where existing inventory is available.

Parameter Comparison

Part Number	Manufacturer	Status	Quiescent Current (µA)	Propagation Delay (ns)	Operating Temp (°C)	Package	RoHS3
CD74HC32M	Texas Instruments	Discontinued	2	15	-55 to 125	14-SOIC	Yes
CD74HC32M96	Texas Instruments	Active	2	15	-55 to 125	14-SOIC	Yes
MC74HC32ADR2G	onsemi	Active	1	13	-55 to 125	14-SOIC	Yes
MM74HC32M	Fairchild Semiconductor	Active	2	17	-40 to 85	14-SOIC	No
74HC32D,653	Nexperia USA Inc.	Active	2	15	-40 to 125	14-SO	Yes
74HC32D-Q100,118	Nexperia USA Inc.	Active	2	15	-40 to 125	14-SO	Yes
74HC32S14-13	Diodes Incorporated	Active	20	15	-40 to 125	14-SO	Yes
MC74HC32ADG	onsemi	Active	1	13	-55 to 125	14-SOIC	Yes
MM74HC32MX	Fairchild Semiconductor	Active	2	17	-40 to 85	14-SOIC	No
NLV74HC32ADG	onsemi	Obsolete	1	19	-55 to 125	14-SOIC	Yes
NLV74HC32ADR2G	onsemi	Obsolete	1	13	-55 to 125	14-SOIC	Yes

Engineering Selection Recommendations

For Active Production (Preferred):

CD74HC32M96 (Texas Instruments) is the direct equivalent with identical electrical specifications and Active product status. This part maintains the same quiescent current (2 µA), propagation delay (15ns), and operating temperature range (-55°C to 125°C) as the original CD74HC32M.

MC74HC32ADR2G (onsemi) and MC74HC32ADG (onsemi) offer improved performance with lower quiescent current (1 µA) and faster propagation delay (13ns), both ROHS3 compliant with Active status.

74HC32D,653 and 74HC32D-Q100,118 (Nexperia USA Inc.) provide Active status with ROHS3 compliance. The 74HC32D-Q100,118 variant includes AEC-Q100 automotive qualification for applications requiring automotive-grade components.

For Extended Temperature Range (-55°C to 125°C):

CD74HC32M96, MC74HC32ADR2G, MC74HC32ADG, NLV74HC32ADG, and NLV74HC32ADR2G all support the full -55°C to 125°C operating range. Parts limited to -40°C to 85°C (MM74HC32M, MM74HC32MX, 74HC32D,653, 74HC32D-Q100,118, 74HC32S14-13) are suitable only for applications within this narrower range.

For RoHS3 Compliance:

All parts except MM74HC32M and MM74HC32MX are ROHS3 compliant. Select from the compliant list for applications requiring RoHS3 certification.

For Automotive Applications:

74HC32D-Q100,118 (Nexperia) and NLV74HC32ADG/NLV74HC32ADR2G (onsemi) carry AEC-Q100 automotive qualification. These parts are suitable for automotive-grade designs.

Frequently Asked Questions (FAQ)

Q: Can I use CD74HC32M96 as a direct replacement for CD74HC32M?

A: Yes. CD74HC32M96 is manufactured by the same supplier (Texas Instruments) with identical electrical specifications, operating temperature range, and package. The primary difference is packaging format (Cut Tape & Digi-Reel vs. Tube) and Active product status.

Q: What is the difference between 14-SOIC and 14-SO packages?

A: Both packages are functionally equivalent surface mount packages with identical pin pitch and electrical performance. 14-SOIC and 14-SO refer to the same physical form factor (0.154" width, 3.90mm). Parts specified as either package type are mechanically and electrically interchangeable.

Q: Why do some substitutes have lower quiescent current?

A: MC74HC32ADR2G and MC74HC32ADG (onsemi) specify 1 µA quiescent current versus 2 µA for the CD74HC32M. This represents improved power efficiency in the same logic family and does not affect functional compatibility. Lower quiescent current is beneficial for battery-powered applications.

Q: Are Obsolete parts suitable for new designs?

A: Obsolete parts (NLV74HC32ADG, NLV74HC32ADR2G) are not recommended for new designs. These parts are suitable only where existing inventory is available and supply continuity is not required. For new production, select from Active status parts.

Q: What does AEC-Q100 qualification mean?

A: AEC-Q100 is an automotive industry qualification standard. Parts carrying this qualification (74HC32D-Q100,118, NLV74HC32ADG, NLV74HC32ADR2G) meet automotive reliability and quality requirements and are suitable for automotive applications.

Q: Can I use 74HC32S14-13 if my application requires -55°C operation?

A: No. 74HC32S14-13 operates from -40°C to 125°C. If your application requires -55°C minimum operating temperature, select from parts specifying -55°C to 125°C range: CD74HC32M96, MC74HC32ADR2G, MC74HC32ADG, NLV74HC32ADG, or NLV74HC32ADR2G.

Q: Why does 74HC32S14-13 specify 20 µA quiescent current?

A: 74HC32S14-13 (Diodes Incorporated) specifies 20 µA maximum quiescent current, which is higher than other substitutes. This part remains functionally compatible but draws more standby current. For power-sensitive applications, select alternatives with lower quiescent current specifications.

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