CD74HC32ME4 Equivalent & Substitute Parts

Part Overview

The CD74HC32ME4 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, making equivalent substitutes necessary for ongoing production and maintenance applications. The 74HC32 series provides standard logic gating functionality across the 2V to 6V supply voltage range with consistent electrical performance across multiple manufacturers.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	5.2mA, 5.2mA
Input Logic Level - Low	0.5V ~ 1.8V
Input Logic Level - High	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	15ns
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CD74HC32ME4 is determined by strict equivalence across the following parameters:

Logic function: 4-channel 2-input OR gate
Supply voltage range: 2V ~ 6V
Package type: 14-SOIC surface mount
Electrical characteristics: Output current, input logic levels, and propagation delay within acceptable tolerances
Compliance: RoHS3 compliance and MSL rating

Substitute parts are grouped into two categories: direct equivalents with identical electrical specifications and functional equivalents with minor variations in quiescent current or propagation delay that remain within the 74HC32 logic family specification.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Supply	Current - Quiescent (Max)	Max Propagation Delay @ 6V, 50pF	Operating Temperature	Package	RoHS Status
CD74HC32ME4	Texas Instruments	Discontinued	2V ~ 6V	2 µA	15ns	-55°C ~ 125°C	14-SOIC	ROHS3 Compliant
CD74HC32M96	Texas Instruments	Active	2V ~ 6V	2 µA	15ns	-55°C ~ 125°C	14-SOIC	ROHS3 Compliant
MC74HC32ADR2G	onsemi	Active	2V ~ 6V	1 µA	13ns	-55°C ~ 125°C	14-SOIC	ROHS3 Compliant
74HC32D,653	Nexperia USA Inc.	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 125°C	14-SOIC	ROHS3 Compliant
74HC32D-Q100,118	Nexperia USA Inc.	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 125°C	14-SOIC	ROHS3 Compliant
74HC32S14-13	Diodes Incorporated	Active	2V ~ 6V	20 µA	15ns	-40°C ~ 125°C	14-SOIC	ROHS3 Compliant
MC74HC32ADG	onsemi	Active	2V ~ 6V	1 µA	13ns	-55°C ~ 125°C	14-SOIC	ROHS3 Compliant
MM74HC32M	Fairchild Semiconductor	Active	2V ~ 6V	2 µA	17ns	-40°C ~ 85°C	14-SOIC	Not specified
MM74HC32MX	Fairchild Semiconductor	Active	2V ~ 6V	2 µA	17ns	-40°C ~ 85°C	14-SOIC	Not specified
NLV74HC32ADG	onsemi	Obsolete	2V ~ 6V	1 µA	19ns	-55°C ~ 125°C	14-SOIC	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compliance)

CD74HC32M96 (Texas Instruments) is the direct equivalent with identical electrical specifications and active product status. This part maintains the original -55°C to 125°C operating range and ROHS3 compliance.

MC74HC32ADR2G and MC74HC32ADG (onsemi) are functionally equivalent with improved quiescent current (1 µA vs. 2 µA) and faster propagation delay (13ns vs. 15ns). Both maintain the full -55°C to 125°C temperature range and ROHS3 compliance.

74HC32D,653 and 74HC32D-Q100,118 (Nexperia USA Inc.) provide equivalent electrical performance with active status and ROHS3 compliance. The automotive-qualified variant (74HC32D-Q100,118) includes AEC-Q100 certification for automotive applications.

Secondary Substitutes (Active Status, Limited Temperature Range)

74HC32S14-13 (Diodes Incorporated) is functionally equivalent but operates over -40°C to 125°C and exhibits higher quiescent current (20 µA). This part is suitable for applications not requiring the full -55°C lower temperature limit.

MM74HC32M and MM74HC32MX (Fairchild Semiconductor) are functionally equivalent but operate over -40°C to 85°C, limiting use to applications not requiring extended high-temperature operation beyond 85°C.

Not Recommended

NLV74HC32ADG (onsemi) is obsolete and exhibits slower propagation delay (19ns). CD74HC32M (Harris Corporation) is also obsolete and non-RoHS compliant.

Frequently Asked Questions (FAQ)

Q: Can I use MC74HC32ADR2G as a direct replacement for CD74HC32ME4?

A: Yes. MC74HC32ADR2G is functionally equivalent with identical logic function, supply voltage range, and package. It offers improved electrical performance with lower quiescent current and faster propagation delay while maintaining the full -55°C to 125°C operating range.

Q: What is the difference between 74HC32D,653 and 74HC32D-Q100,118?

A: Both are manufactured by Nexperia with identical electrical specifications. The 74HC32D-Q100,118 variant includes AEC-Q100 automotive qualification and is supplied in Tape & Reel packaging, while 74HC32D,653 is supplied in Cut Tape & Digi-Reel format.

Q: Why does 74HC32S14-13 have higher quiescent current than other substitutes?

A: 74HC32S14-13 (Diodes Incorporated) exhibits 20 µA quiescent current compared to 1-2 µA in other variants. This is within the 74HC32 logic family specification but represents a different manufacturing process. It remains functionally equivalent for logic gating applications.

Q: Can I use MM74HC32M in applications requiring -55°C operation?

A: No. MM74HC32M operates from -40°C to 85°C. For applications requiring -55°C operation, use CD74HC32M96, MC74HC32ADR2G, MC74HC32ADG, or NLV74HC32ADG.

Q: Are all substitutes RoHS3 compliant?

A: Most active substitutes are ROHS3 compliant. MM74HC32M and MM74HC32MX do not specify RoHS status. Verify compliance requirements for your application before selection.

Q: What packaging options are available for 74HC32 substitutes?

A: All listed substitutes use 14-SOIC surface mount packaging with 0.154" width (3.90mm). Packaging format varies: Cut Tape (CT), Digi-Reel, Tube, or Tape & Reel (TR). Verify packaging compatibility with your assembly process.

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