74HCT32D,652 Equivalent & Substitute Parts

Part Overview

The 74HCT32D,652 is a 4-channel 2-input OR gate logic IC manufactured by Nexperia USA Inc. in 14-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The 74HCT32 series represents a standard logic gate function across multiple manufacturers. Substitutes are selected based on matching electrical characteristics, package compatibility, and functional equivalence within the 74HCT32 product family.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	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	24ns @ 4.5V, 50pF
Operating Temperature	-40°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74HCT32D,652 is determined by the following criteria:

Mandatory Matching Parameters:

Logic Type: OR Gate
Number of Circuits: 4
Number of Inputs: 2
Package / Case: 14-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Voltage Supply Range: 4.5V ~ 5.5V
Input Logic Levels: 0.8V (Low), 2V (High)

Allowable Variations:

Operating Temperature Range: Extended ranges (-55°C to 125°C) are acceptable for applications requiring wider temperature support
Propagation Delay: Faster specifications are acceptable; slower specifications require application verification
Quiescent Current: Variations within 1-2 µA range are acceptable
Output Current: Specifications of 4mA to 4.8mA are acceptable

Compliance Considerations:

RoHS3 compliance preferred for new designs
REACH Unaffected status acceptable
Moisture Sensitivity Level 1 standard across all candidates

Parameter Comparison

Part Number	Manufacturer	Status	Voltage Supply	Quiescent Current (Max)	Output Current H/L	Propagation Delay	Operating Temp	RoHS Status	Packaging
74HCT32D,652	Nexperia USA Inc.	Obsolete	4.5V ~ 5.5V	2 µA	4mA / 4mA	24ns @ 4.5V, 50pF	-40°C ~ 125°C	ROHS3	14-SOIC
74HCT32D,653	NXP Semiconductors	Active	4.5V ~ 5.5V	—	—	—	—	—	14-SOIC
CD74HCT32M96	Harris Corporation	Obsolete	4.5V ~ 5.5V	2 µA	4mA / 4mA	24ns @ 4.5V, 50pF	-55°C ~ 125°C	Non-compliant	14-SOIC
CD74HCT32MT	Texas Instruments	Discontinued	4.5V ~ 5.5V	2 µA	4mA / 4mA	24ns @ 4.5V, 50pF	-55°C ~ 125°C	ROHS3	14-SOIC
MC74HCT32ADG	onsemi	Obsolete	4.5V ~ 5.5V	1 µA	4mA / 4mA	15ns @ 5V, 50pF	-55°C ~ 125°C	ROHS3	14-SOIC
MC74HCT32ADR2G	onsemi	Active	4.5V ~ 5.5V	1 µA	4mA / 4mA	15ns @ 5V, 50pF	-55°C ~ 125°C	ROHS3	14-SOIC
MM74HCT32M	Fairchild Semiconductor	Active	4.5V ~ 5.5V	2 µA	4.8mA / 4.8mA	20ns @ 5V, 15pF	-40°C ~ 85°C	—	14-SOIC
MM74HCT32MX	Fairchild Semiconductor	Active	4.5V ~ 5.5V	2 µA	4.8mA / 4.8mA	20ns @ 5V, 15pF	-40°C ~ 85°C	—	14-SOIC
SN74HCT32D	Texas Instruments	Discontinued	4.5V ~ 5.5V	2 µA	4mA / 4mA	22ns @ 5.5V, 50pF	-40°C ~ 85°C	ROHS3	14-SOIC
SN74HCT32DR	Texas Instruments	Active	4.5V ~ 5.5V	2 µA	4mA / 4mA	22ns @ 5.5V, 50pF	-40°C ~ 85°C	ROHS3	14-SOIC
SN74HCT32DRG4	Texas Instruments	Discontinued	4.5V ~ 5.5V	2 µA	4mA / 4mA	22ns @ 5.5V, 50pF	-40°C ~ 85°C	ROHS3	14-SOIC

Engineering Selection Recommendations

Primary Recommendation - Active Status: MC74HCT32ADR2G (onsemi) is the preferred substitute. This part is currently active in production, ROHS3 compliant, and offers improved propagation delay performance (15ns vs. 24ns). Extended operating temperature range (-55°C to 125°C) provides additional design margin.

Secondary Recommendation - Active Status: SN74HCT32DR (Texas Instruments) is an active alternative with identical electrical specifications to the original part. ROHS3 compliant with standard operating temperature range (-40°C to 85°C). Suitable for applications with standard temperature requirements.

Alternative - Active Status: MM74HCT32M or MM74HCT32MX (Fairchild Semiconductor) are active parts with acceptable electrical performance. Operating temperature limited to -40°C to 85°C. Verify temperature requirements before selection.

Not Recommended for New Designs: Parts with obsolete or discontinued status (74HCT32D,653, CD74HCT32M96, CD74HCT32MT, MC74HCT32ADG, SN74HCT32D, SN74HCT32DRG4) should not be selected for new designs due to limited availability and production discontinuation.

Frequently Asked Questions (FAQ)

Q: Can I use MC74HCT32ADR2G as a direct replacement for 74HCT32D,652? A: Yes. Both parts share identical logic function, pin configuration, package type (14-SOIC), and voltage supply range (4.5V ~ 5.5V). MC74HCT32ADR2G offers faster propagation delay and extended temperature range, making it functionally superior.

Q: What is the difference between the onsemi and Texas Instruments versions? A: Both manufacturers produce functionally equivalent 74HCT32 logic gates. onsemi versions (MC74HCT32ADR2G, MC74HCT32ADG) feature lower quiescent current (1 µA vs. 2 µA) and faster propagation delay (15ns vs. 22ns). Texas Instruments versions (SN74HCT32DR, SN74HCT32D) maintain standard specifications. Selection depends on power consumption and timing requirements.

Q: Are all substitutes in 14-SOIC packaging? A: Yes. All listed substitute parts use 14-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring mechanical and electrical compatibility with the original 74HCT32D,652.

Q: Does operating temperature range affect substitution eligibility? A: Extended temperature ranges (-55°C to 125°C) are acceptable for applications requiring wider environmental support. Standard range parts (-40°C to 85°C) are suitable for typical industrial applications. Verify application temperature requirements before final selection.

Q: Which substitute has the best availability? A: SN74HCT32DR (Texas Instruments) and MC74HCT32ADR2G (onsemi) are both active production parts with highest inventory levels (15,923 and 10,300 units respectively), ensuring reliable long-term availability.

Q: Is RoHS3 compliance required? A: RoHS3 compliance is standard for new designs and required in most regulated markets. MC74HCT32ADR2G, CD74HCT32MT, SN74HCT32DR, and SN74HCT32DRG4 are ROHS3 compliant. CD74HCT32M96 is non-compliant and not recommended for new applications.

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