74AC32SC_NL OR Gate IC Equivalent & Substitute Parts

Part Overview

The 74AC32SC_NL is a 4-channel 2-input OR gate logic IC manufactured by onsemi in a 14-SOIC surface mount package. This part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74AC32 series represents a standard logic gate function across multiple manufacturers, with several active alternatives available that maintain functional compatibility within defined electrical and mechanical parameters.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	2V ~ 6V
Current Output High/Low	24mA / 24mA
Max Propagation Delay	7.5ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C
Package Type	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the 74AC32SC_NL is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Logic Type: OR Gate (4 channels, 2 inputs per channel)
Voltage Supply Range: 2V ~ 6V minimum
Output Current: 24mA minimum for both high and low states
Propagation Delay: 7.5ns maximum @ 5V, 50pF load
Package: 14-SOIC surface mount
Operating Temperature: -40°C ~ 85°C minimum range

Direct Substitutes maintain all primary parameters identically and can be used as pin-for-pin replacements without circuit modification.

Parametric Equivalents maintain functional logic operation and electrical performance but may differ in secondary specifications such as quiescent current or packaging format (tube vs. tape & reel).

Similar Parts meet core logic function requirements but may have extended operating temperature ranges or slightly different electrical specifications that require design review.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Supply	Quiescent Current (Max)	Output Current H/L	Propagation Delay	Operating Temp	Package	Packaging Format
74AC32SC_NL	onsemi	Obsolete	2V ~ 6V	2 µA	24mA / 24mA	7.5ns @ 5V	-40°C ~ 85°C	14-SOIC	—
MC74AC32DR2G	onsemi	Active	2V ~ 6V	4 µA	24mA / 24mA	7.5ns @ 5V	-40°C ~ 85°C	14-SOIC	Cut Tape & Digi-Reel
MC74AC32DG	onsemi	Active	2V ~ 6V	4 µA	24mA / 24mA	7.5ns @ 5V	-40°C ~ 85°C	14-SOIC	Tube
SN74AC32DR	Texas Instruments	Active	2V ~ 6V	2 µA	24mA / 24mA	7.5ns @ 5V	-40°C ~ 85°C	14-SOIC	Tape & Reel
SN74AC32MDREP	Texas Instruments	Active	2V ~ 6V	2 µA	24mA / 24mA	7.5ns @ 5V	-55°C ~ 125°C	14-SOIC	Tape & Reel
CD74AC32M96	Texas Instruments	Active	1.5V ~ 5.5V	4 µA	24mA / 24mA	9.5ns @ 5V	-55°C ~ 125°C	14-SOIC	Cut Tape & Digi-Reel
SN74AC32NSR	Texas Instruments	Active	2V ~ 6V	2 µA	24mA / 24mA	7.5ns @ 5V	-40°C ~ 85°C	14-SO (0.209")	Tape & Reel
SN74AC32D	Texas Instruments	Discontinued at DiGi Electronics	2V ~ 6V	2 µA	24mA / 24mA	7.5ns @ 5V	-40°C ~ 85°C	14-SOIC	Tube

Engineering Selection Recommendations

Recommended Direct Substitutes (Active Status, Identical Specifications):

MC74AC32DR2G and MC74AC32DG from onsemi maintain identical electrical specifications to the 74AC32SC_NL with active product status. Both are RoHS3 compliant and carry REACH Unaffected certification. Selection between these two depends on packaging requirements: MC74AC32DR2G is supplied in Cut Tape & Digi-Reel format for automated assembly, while MC74AC32DG is supplied in Tube format for manual handling.

SN74AC32DR from Texas Instruments provides direct electrical equivalence with active status, RoHS3 compliance, and Tape & Reel packaging suitable for high-volume production. This part matches the original quiescent current specification of 2 µA.

Extended Temperature Range Alternative:

SN74AC32MDREP extends the operating temperature range to -55°C ~ 125°C while maintaining all other electrical parameters. This part is suitable for applications requiring wider temperature operation and is available in Tape & Reel format with RoHS3 compliance.

Parametric Alternative with Specification Variance:

CD74AC32M96 operates across a wider voltage supply range (1.5V ~ 5.5V) and extended temperature range (-55°C ~ 125°C) but exhibits slightly higher propagation delay (9.5ns vs. 7.5ns @ 5V, 50pF). This part is suitable for low-voltage applications where the additional propagation delay is acceptable.

Package Variant Consideration:

SN74AC32NSR uses a 14-SO package (0.209" width) instead of the standard 14-SOIC (0.154" width). This part maintains electrical equivalence but requires PCB layout adjustment due to increased package width. Use only if board space permits the larger footprint.

Frequently Asked Questions (FAQ)

Q: Can MC74AC32DR2G directly replace 74AC32SC_NL without circuit modification?

A: Yes. MC74AC32DR2G is a direct pin-for-pin substitute with identical logic function, voltage supply range, output current, and propagation delay specifications. The only difference is quiescent current (4 µA vs. 2 µA), which has negligible impact on most circuit designs. Both parts use the same 14-SOIC package footprint.

Q: What is the difference between MC74AC32DG and MC74AC32DR2G?

A: Both parts are electrically identical. The difference is packaging format: MC74AC32DG is supplied in Tube format for manual component handling, while MC74AC32DR2G is supplied in Cut Tape & Digi-Reel format optimized for automated pick-and-place assembly. Select based on your assembly process requirements.

Q: Why does CD74AC32M96 have a higher propagation delay (9.5ns vs. 7.5ns)?

A: CD74AC32M96 is designed for operation across a wider voltage supply range (1.5V ~ 5.5V) and extended temperature range (-55°C ~ 125°C). The increased propagation delay is a trade-off for this extended operating envelope. Use this part only if your application requires low-voltage or wide-temperature operation and can tolerate the additional delay.

Q: Is SN74AC32NSR compatible with the original 74AC32SC_NL footprint?

A: SN74AC32NSR uses a 14-SO package with 0.209" width compared to the standard 14-SOIC with 0.154" width. While pin count and spacing are identical, the larger package body requires PCB layout verification. Do not use as a direct footprint replacement without confirming board clearance.

Q: Which substitute part has the best availability?

A: SN74AC32DR from Texas Instruments shows the highest inventory (5038 pcs) with active product status. MC74AC32DG from onsemi also has strong availability (4321 pcs). Both are suitable for immediate procurement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed carry RoHS3 compliance certification. All parts also carry REACH Unaffected status, meeting current environmental and regulatory requirements.

Q: Can I use SN74AC32MDREP in a circuit designed for -40°C ~ 85°C operation?

A: Yes. SN74AC32MDREP is rated for -55°C ~ 125°C operation, which encompasses the -40°C ~ 85°C range. This part can be used as a direct substitute with no circuit modification. The extended temperature rating provides additional design margin.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message