MC74ACT05D Equivalent & Substitute Parts

Part Overview

The MC74ACT05D is a 6-channel inverter IC with open-drain outputs in a 14-SOIC surface mount package, manufactured by onsemi. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement. The MC74ACT05D operates within the 74ACT logic family and is suitable for applications requiring open-drain inverter functionality with standard TTL voltage levels.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Features	Open Drain
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	4 µA
Current - Output High, Low	-, 24mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Series	74ACT

Substitute Part Grouping Explanation

Substitution of the MC74ACT05D is determined by the following critical parameters:

Logic Configuration: 6-channel inverter with open-drain output topology
Electrical Specifications: Supply voltage range (4.5V ~ 5.5V), quiescent current (4 µA max), output current (24mA), input logic thresholds (0.8V low, 2V high)
Propagation Delay: Maximum delay specification at 5V with 50pF load
Package Compatibility: 14-SOIC surface mount package with identical physical dimensions
Series Alignment: 74ACT logic family compatibility

All substitute parts maintain identical logic configuration, electrical performance within specified tolerances, and physical package compatibility. Differences in product status, operating temperature range, and RoHS compliance are noted for design consideration.

Parameter Comparison

Parameter	MC74ACT05D (Main)	MC74ACT05DG	CD74ACT05M	CD74ACT05M96
Manufacturer	onsemi	onsemi	Texas Instruments	Texas Instruments
Logic Type	Inverter	Inverter	Inverter	Inverter
Number of Circuits	6	6	6	6
Features	Open Drain	Open Drain	Open Drain	Open Drain
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Current - Quiescent (Max)	4 µA	4 µA	4 µA	4 µA
Current - Output High, Low	-, 24mA	-, 24mA	-, 24mA	-, 24mA
Input Logic Level - Low	0.8V	0.8V	0.8V	0.8V
Input Logic Level - High	2V	2V	2V	2V
Max Propagation Delay @ 5V, 50pF	8.5ns	8.5ns	10.8ns	10.8ns
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Product Status	Obsolete	Active	Discontinued at DiGi Electronics	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: MC74ACT05DG

The MC74ACT05DG is the direct onsemi equivalent with active product status. It maintains identical electrical specifications and operating temperature range as the MC74ACT05D while offering ROHS3 compliance. This part is the preferred replacement for direct substitution in existing designs.

Extended Temperature Range Alternatives: CD74ACT05M96 and CD74ACT05M

The CD74ACT05M96 (Texas Instruments, active status) and CD74ACT05M (Texas Instruments, discontinued at DiGi Electronics) provide extended operating temperature range (-55°C ~ 125°C) compared to the MC74ACT05D (-40°C ~ 85°C). Both parts maintain identical electrical specifications with slightly higher propagation delay (10.8ns versus 8.5ns). These alternatives are suitable for applications requiring wider temperature operation or when long-term availability from Texas Instruments is prioritized. CD74ACT05M96 is preferred due to active product status.

All substitute parts maintain ROHS3 compliance and identical package geometry, ensuring mechanical and electrical compatibility with existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT05DG be used as a direct replacement for MC74ACT05D?

A: Yes. The MC74ACT05DG is electrically and mechanically identical to the MC74ACT05D. Both parts share the same logic configuration, electrical specifications, operating temperature range, and 14-SOIC package. The primary difference is product status: MC74ACT05DG is active while MC74ACT05D is obsolete.

Q: What is the difference between MC74ACT05DG and CD74ACT05M96?

A: Both parts are functionally equivalent 6-channel open-drain inverters in 14-SOIC packages. The key differences are: (1) Manufacturer—MC74ACT05DG is onsemi; CD74ACT05M96 is Texas Instruments; (2) Operating temperature range—MC74ACT05DG operates -40°C ~ 85°C; CD74ACT05M96 operates -55°C ~ 125°C; (3) Propagation delay—MC74ACT05DG has 8.5ns maximum delay; CD74ACT05M96 has 10.8ns maximum delay. Select CD74ACT05M96 for extended temperature applications.

Q: Are all substitute parts available in the same packaging options?

A: The substitute parts differ in packaging format. MC74ACT05D and MC74ACT05DG are supplied in standard packaging; CD74ACT05M is supplied in Tube; CD74ACT05M96 is supplied in Cut Tape (CT). All parts use the identical 14-SOIC physical package suitable for surface mount assembly.

Q: Is the MC74ACT05D RoHS compliant?

A: No. The MC74ACT05D is RoHS non-compliant. All substitute parts (MC74ACT05DG, CD74ACT05M, CD74ACT05M96) are ROHS3 compliant, making them suitable for applications with RoHS requirements.

Q: Can I use CD74ACT05M or CD74ACT05M96 in a design originally specified for MC74ACT05D?

A: Yes, with timing considerations. Both Texas Instruments parts are functionally compatible. However, the propagation delay is 10.8ns compared to 8.5ns for the MC74ACT05D. If the design has timing-critical paths with margins less than 2.3ns, verify that the extended delay does not violate system requirements. The extended operating temperature range (-55°C ~ 125°C) provides additional design flexibility for harsh environment applications.

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