CD74HCT32ME4 Equivalent & Substitute Parts

Part Overview

The CD74HCT32ME4 is a 4-channel 2-input OR gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This part operates at 4.5V to 5.5V supply voltage with a maximum propagation delay of 24ns at 4.5V with 50pF load. The CD74HCT32ME4 is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications requiring 74HCT32 OR gate functionality.

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	4mA, 4mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	24ns @ 4.5V, 50pF
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 CD74HCT32ME4 is determined by the following critical parameters: logic type (OR gate), circuit count (4 channels), input count (2 inputs per channel), supply voltage range (4.5V ~ 5.5V), package type (14-SOIC surface mount), and compliance certifications (ROHS3, REACH Unaffected). All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional and physical compatibility. Propagation delay, quiescent current, and operating temperature ranges may vary within acceptable limits for the 74HCT32 logic family while preserving circuit performance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Logic Type	Circuits	Inputs	Voltage - Supply	Current - Quiescent (Max)	Output Current (High/Low)	Propagation Delay	Operating Temperature	Package	Product Status
CD74HCT32ME4	Texas Instruments	OR Gate	4	2	4.5V ~ 5.5V	2 µA	4mA / 4mA	24ns @ 4.5V, 50pF	-55°C ~ 125°C	14-SOIC	Discontinued
74HCT32D,653	NXP Semiconductors	OR Gate	4	2	4.5V ~ 5.5V	Not specified	Not specified	Not specified	Not specified	14-SOIC	Active
74HCT32S14-13	Diodes Incorporated	OR Gate	4	2	4.5V ~ 5.5V	20 µA	4mA / 4mA	24ns @ 4.5V, 50pF	-40°C ~ 125°C	14-SO	Active
MC74HCT32ADG	onsemi	OR Gate	4	2	4.5V ~ 5.5V	1 µA	4mA / 4mA	15ns @ 5V, 50pF	-55°C ~ 125°C	14-SOIC	Obsolete
MC74HCT32ADR2G	onsemi	OR Gate	4	2	4.5V ~ 5.5V	1 µA	4mA / 4mA	15ns @ 5V, 50pF	-55°C ~ 125°C	14-SOIC	Active
MM74HCT32M	Fairchild Semiconductor	OR Gate	4	2	4.5V ~ 5.5V	2 µA	4.8mA / 4.8mA	20ns @ 5V, 15pF	-40°C ~ 85°C	14-SOIC	Active
MM74HCT32MX	Fairchild Semiconductor	OR Gate	4	2	4.5V ~ 5.5V	2 µA	4.8mA / 4.8mA	20ns @ 5V, 15pF	-40°C ~ 85°C	14-SOIC	Active

Engineering Selection Recommendations

For applications requiring the CD74HCT32ME4, the following substitutes are recommended based on product status and compliance:

Primary Recommendation: MC74HCT32ADR2G (onsemi) is the preferred active substitute. It maintains identical electrical specifications to the original part, operates across the full -55°C to 125°C temperature range, and is currently in active production status with ROHS3 compliance and REACH Unaffected certification.

Secondary Recommendation: 74HCT32D,653 (NXP Semiconductors) is an active alternative with high inventory availability. This part maintains core 74HCT32 functionality and supply voltage specifications, though detailed electrical parameters are not fully specified in available documentation.

Alternative Consideration: 74HCT32S14-13 (Diodes Incorporated) is an active substitute with complete electrical specifications matching the original part. Operating temperature range is limited to -40°C to 125°C, making it suitable for applications not requiring the full -55°C lower temperature specification.

Not Recommended: MC74HCT32ADG (onsemi) carries obsolete product status and should not be selected for new designs despite technical compatibility.

Frequently Asked Questions (FAQ)

Q: Can MM74HCT32M or MM74HCT32MX be used as direct replacements for CD74HCT32ME4?

A: Yes, both Fairchild Semiconductor parts are functionally compatible. They maintain the same logic type, circuit count, input configuration, and supply voltage range. However, the operating temperature range is limited to -40°C to 85°C compared to the original -55°C to 125°C specification. Verify application temperature requirements before selection.

Q: What is the difference between MC74HCT32ADR2G and MC74HCT32ADG?

A: Both parts are manufactured by onsemi with identical electrical specifications. The primary difference is product status: MC74HCT32ADR2G is active production, while MC74HCT32ADG is obsolete. MC74HCT32ADR2G is the appropriate choice for new applications.

Q: Are all substitute parts available in 14-SOIC packaging?

A: All listed substitutes use 14-SOIC or equivalent 14-SO surface mount packaging with 0.154" (3.90mm) width, ensuring physical compatibility with the original CD74HCT32ME4 footprint.

Q: Do all substitutes meet ROHS3 compliance?

A: Yes, all substitute parts listed carry ROHS3 compliance and REACH Unaffected certification, matching the environmental compliance status of the original CD74HCT32ME4.

Q: Which substitute has the fastest propagation delay?

A: MC74HCT32ADR2G and MC74HCT32ADG both specify 15ns propagation delay at 5V with 50pF load, compared to 24ns for the original part. This represents improved timing performance while maintaining functional compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message