74F32SC OR Gate IC Equivalent & Substitute Parts

Part Overview

The 74F32SC is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The 74F32 series provides standard TTL-compatible OR gate functionality suitable for digital logic circuits requiring signal combination operations.

Key Parameters

Parameter	Specification
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	4.5V ~ 5.5V
Output Current (High/Low)	1mA / 20mA
Input Logic Level Low	0.8V
Input Logic Level High	2V
Max Propagation Delay	5.6ns @ 5V, 50pF
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package	14-SOIC
Series	74F

Substitute Part Grouping Explanation

Substitution eligibility for the 74F32SC is determined by the following critical parameters:

Logic type (OR Gate), number of circuits (4), and number of inputs (2) must be identical
Voltage supply range must match: 4.5V ~ 5.5V
Output current specifications must match: 1mA high, 20mA low
Input logic levels must match: 0.8V low, 2V high
Operating temperature range must match: 0°C ~ 70°C
Propagation delay must not exceed 5.6ns @ 5V
Package type must be compatible with 14-SOIC footprint specifications

The substitute parts are grouped into two categories:

Direct Substitutes: SN74F32D and SN74F32DR meet all electrical and mechanical parameters identically to the 74F32SC.

Similar Substitute: SN74F32NSR maintains identical electrical specifications but uses a 14-SO package with different physical dimensions (0.209" width vs. 0.154" width), requiring PCB layout verification before implementation.

Parameter Comparison

Parameter	74F32SC (onsemi)	SN74F32D (TI)	SN74F32DR (TI)	SN74F32NSR (TI)
Logic Type	OR Gate	OR Gate	OR Gate	OR Gate
Number of Circuits	4	4	4	4
Number of Inputs	2	2	2	2
Voltage Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Output Current (High/Low)	1mA / 20mA	1mA / 20mA	1mA / 20mA	1mA / 20mA
Input Logic Level Low	0.8V	0.8V	0.8V	0.8V
Input Logic Level High	2V	2V	2V	2V
Max Propagation Delay	5.6ns @ 5V, 50pF	5.6ns @ 5V	5.6ns @ 5V	5.6ns @ 5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package Type	14-SOIC (0.154")	14-SOIC (0.154")	14-SOIC (0.154")	14-SO (0.209")
Product Status	Obsolete	Last Time Buy	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

SN74F32DR (Texas Instruments) is the primary recommended substitute. This part is currently in active production status, maintains full electrical and mechanical compatibility with the 74F32SC, and carries ROHS3 compliance certification. The tape and reel packaging format supports high-volume manufacturing environments.

SN74F32D (Texas Instruments) serves as an alternative direct substitute with identical electrical specifications and 14-SOIC packaging. This part is designated as Last Time Buy, indicating limited future availability. Tube packaging is suitable for lower-volume applications.

SN74F32NSR (Texas Instruments) is functionally equivalent electrically but uses a 14-SO package with a 0.209" width compared to the standard 0.154" width of the 14-SOIC package. PCB layout compatibility must be verified before selection, as the wider package footprint may conflict with existing board designs.

All substitute parts maintain identical logic functionality, electrical performance, and operating characteristics required for direct replacement in 74F32 circuit applications.

Frequently Asked Questions (FAQ)

Q: Can SN74F32NSR be used as a direct replacement for 74F32SC on existing PCBs?

A: SN74F32NSR has different package dimensions (14-SO with 0.209" width vs. 14-SOIC with 0.154" width). Physical compatibility with the PCB footprint must be confirmed before use. Pin configuration remains identical, but board layout spacing may require adjustment.

Q: What is the difference between SN74F32D and SN74F32DR?

A: Both parts are electrically identical with matching 14-SOIC packaging and specifications. The primary difference is packaging format: SN74F32D is supplied in tubes, while SN74F32DR is supplied in tape and reel format. Selection depends on manufacturing volume and handling requirements.

Q: Why is the 74F32SC listed as obsolete?

A: The 74F32SC is an onsemi product that has reached end-of-life status. Texas Instruments continues active production of equivalent 74F32 parts, making SN74F32DR the recommended long-term solution for new designs and ongoing production.

Q: Are all substitute parts RoHS compliant?

A: Yes. SN74F32D, SN74F32DR, and SN74F32NSR are all ROHS3 compliant. The original 74F32SC RoHS status was not specified in available documentation.

Q: Do the substitute parts have the same propagation delay as the 74F32SC?

A: Yes. All substitute parts maintain the maximum propagation delay specification of 5.6ns @ 5V, ensuring timing compatibility in existing circuit designs.

Q: What is the moisture sensitivity level for these parts?

A: All parts, including the 74F32SC and all substitutes, have a Moisture Sensitivity Level (MSL) of 1, indicating unlimited shelf life without moisture control requirements.

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