74ACT32MTC Equivalent & Substitute Parts

Part Overview

The 74ACT32MTC is a 4-channel 2-input OR gate logic IC manufactured by onsemi in a 14-TSSOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74ACT32 series maintains consistent functional performance across multiple manufacturers and packaging options, enabling direct substitution based on electrical and mechanical parameter alignment.

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)	4 µA
Current - Output High, Low	24mA, 24mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	9ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Base Product Number	74ACT32

Substitute Part Grouping Explanation

Substitution of the 74ACT32MTC is determined by strict parameter matching across the following criteria:

Electrical Parameters (Must Match):

Logic type: OR Gate with 4 channels and 2 inputs per channel
Supply voltage range: 4.5V ~ 5.5V
Output current capability: 24mA high and low
Input logic levels: 0.8V low, 2V high
Propagation delay: 9ns @ 5V, 50pF
Operating temperature range: -40°C ~ 85°C

Mechanical Parameters (Allowable Variations):

Package type: 14-TSSOP or 14-SSOP (both 14-pin surface mount variants)
Packaging format: Tube, Tape & Reel (TR), or Cut Tape (CT)

Manufacturer Flexibility:

onsemi and Texas Instruments both produce functionally equivalent 74ACT32 devices
Quiescent current specifications may vary (2 µA to 4 µA) without affecting functional compatibility

Parameter Comparison

Part Number	Manufacturer	Package Type	Packaging Format	Voltage - Supply	Current - Quiescent (Max)	Output Current (High/Low)	Propagation Delay	Operating Temperature	Product Status
74ACT32MTC	onsemi	14-TSSOP	Tube	4.5V ~ 5.5V	4 µA	24mA, 24mA	9ns @ 5V, 50pF	-40°C ~ 85°C	Obsolete
MC74ACT32DTR2G	onsemi	14-TSSOP	Tape & Reel (TR)	4.5V ~ 5.5V	4 µA	24mA, 24mA	9ns @ 5V, 50pF	-40°C ~ 85°C	Active
SN74ACT32DBR	Texas Instruments	14-SSOP	Tape & Reel (TR)	4.5V ~ 5.5V	2 µA	24mA, 24mA	9ns @ 5V, 50pF	-40°C ~ 85°C	Active
SN74ACT32PWR	Texas Instruments	14-TSSOP	Cut Tape (CT) & Digi-Reel®	4.5V ~ 5.5V	2 µA	24mA, 24mA	9ns @ 5V, 50pF	-40°C ~ 85°C	Active
SN74ACT32PW	Texas Instruments	14-TSSOP	Tube	4.5V ~ 5.5V	2 µA	24mA, 24mA	9ns @ 5V, 50pF	-40°C ~ 85°C	Discontinued at DiGi Electronics

Engineering Selection Recommendations

Direct Replacement (Identical Package and Electrical Specifications): MC74ACT32DTR2G is the primary direct substitute for 74ACT32MTC. Both use onsemi manufacturing, 14-TSSOP packaging, and identical electrical parameters. The only difference is packaging format (Tape & Reel vs. Tube), which does not affect component functionality. MC74ACT32DTR2G maintains active product status.

Cross-Manufacturer Substitutes (Identical Electrical Performance): SN74ACT32PWR and SN74ACT32PW are Texas Instruments equivalents with identical 14-TSSOP packaging and electrical specifications. Both meet the same supply voltage, output current, propagation delay, and operating temperature requirements. SN74ACT32PWR is available in Cut Tape format with active status. SN74ACT32PW is available in Tube format but is discontinued at DiGi Electronics.

Package Variant Substitute (14-SSOP Alternative): SN74ACT32DBR is a Texas Instruments equivalent using 14-SSOP packaging instead of 14-TSSOP. The 14-SSOP package has a larger width (5.30mm vs. 4.40mm) and may require PCB layout verification. Electrical specifications remain identical. This option is suitable only if PCB footprint accommodates the larger package dimensions.

Compliance and Certification: All substitute parts maintain ROHS3 compliance, unlimited moisture sensitivity level (MSL 1), and REACH unaffected status, matching the original 74ACT32MTC specifications.

Frequently Asked Questions (FAQ)

Q: Can I use SN74ACT32DBR as a direct replacement for 74ACT32MTC? A: SN74ACT32DBR is electrically equivalent but uses 14-SSOP packaging instead of 14-TSSOP. The package footprint is larger (5.30mm width vs. 4.40mm width). Substitution is possible only if your PCB layout accommodates the larger package dimensions.

Q: What is the difference between 14-TSSOP and 14-SSOP packages? A: Both are 14-pin surface mount packages with identical pin counts and electrical connections. The primary difference is physical size: 14-SSOP is wider (5.30mm) than 14-TSSOP (4.40mm). Pin pitch and electrical performance are equivalent.

Q: Why do some substitutes have lower quiescent current (2 µA vs. 4 µA)? A: Lower quiescent current indicates improved power efficiency in the Texas Instruments variants. This difference does not affect functional compatibility or electrical performance in standard applications. Both specifications meet the 74ACT32 standard.

Q: Is MC74ACT32DTR2G a suitable replacement for 74ACT32MTC? A: Yes. MC74ACT32DTR2G is the recommended direct substitute. It uses identical onsemi manufacturing, 14-TSSOP packaging, and all electrical specifications match the original part. The only difference is packaging format (Tape & Reel vs. Tube), which does not affect component performance.

Q: Can I mix packaging formats (Tube, Tape & Reel, Cut Tape) in the same design? A: Yes. Packaging format affects only procurement and handling. All 74ACT32 variants with matching electrical specifications are functionally interchangeable on the PCB regardless of packaging format.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitutes maintain ROHS3 compliance, matching the original 74ACT32MTC specification.

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