MC74ACT05N Equivalent & Substitute Parts

Part Overview

The MC74ACT05N is a 6-channel inverter IC with open drain outputs in a 14-PDIP through-hole package, manufactured by onsemi. This component operates within the 74ACT logic family and is classified as obsolete. Due to its obsolete status and limited availability from the original manufacturer, identifying functionally equivalent substitute parts is essential for design continuity and procurement flexibility.

Substiute Parts

MC74ACT05N

onsemiIn Stock: 1099MC74ACT05N Datasheet

Current PartRFQ

MC74ACT08DG

onsemiIn Stock: 3657MC74ACT08DG Datasheet

DirectRFQ

CD74ACT05E

Harris CorporationIn Stock: 1847CD74ACT05E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MC74ACT05N is determined by the following critical parameters:

• Logic Type: Inverter with open drain output configuration
• Number of Circuits: 6 channels
• Number of Inputs: 1 input per channel
• Voltage Supply Range: 4.5V ~ 5.5V
• Output Current Capability: 24mA low
• Input Logic Levels: 0.8V (low), 2V (high)
• Operating Temperature Range: Minimum -40°C
• Package Type: 14-DIP through-hole mounting

The CD74ACT05E qualifies as a direct functional equivalent, maintaining identical logic configuration, electrical specifications, and package format. The MC74ACT08DG does not qualify as a substitute due to fundamental functional differences: it is an AND gate (not an inverter), contains 4 circuits with 2 inputs each (not 6 circuits with 1 input), and uses surface mount packaging (not through-hole).

Parameter Comparison

Engineering Selection Recommendations

The CD74ACT05E is the only valid substitute for the MC74ACT05N. Both parts share identical functional specifications, electrical characteristics, and through-hole 14-DIP packaging. The CD74ACT05E offers an extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C), providing additional margin for temperature-sensitive applications. Both parts maintain RoHS non-compliant status.

The MC74ACT08DG is not suitable for direct substitution. Despite belonging to the same 74ACT logic family and sharing supply voltage and input logic level specifications, it performs a fundamentally different logic function (AND gate versus inverter), has a different circuit count and input configuration, and uses surface mount packaging incompatible with through-hole board designs.

For applications requiring RoHS compliance, neither the MC74ACT05N nor CD74ACT05E is appropriate. The MC74ACT08DG achieves ROHS3 compliance but does not meet the functional requirements of an inverter circuit.

Frequently Asked Questions (FAQ)

Q: Can the MC74ACT08DG replace the MC74ACT05N?

A: No. The MC74ACT08DG is an AND gate with 4 circuits and 2 inputs per circuit, whereas the MC74ACT05N is an inverter with 6 circuits and 1 input per circuit. These are functionally incompatible devices. Additionally, the MC74ACT08DG uses 14-SOIC surface mount packaging, not the 14-DIP through-hole package of the MC74ACT05N.

Q: Is the CD74ACT05E a direct replacement for the MC74ACT05N?

A: Yes. The CD74ACT05E is functionally equivalent to the MC74ACT05N. Both are 6-channel inverters with open drain outputs, identical electrical specifications, and 14-DIP through-hole packaging. The CD74ACT05E provides an extended operating temperature range and is manufactured by Harris Corporation.

Q: What are the critical parameters that determine substitution compatibility?

A: For the MC74ACT05N, substitution compatibility is determined by: logic type (inverter), number of circuits (6), number of inputs (1), open drain output feature, supply voltage range (4.5V ~ 5.5V), output current capability (24mA low), input logic levels (0.8V low, 2V high), and package type (14-DIP through-hole).

Q: Does the CD74ACT05E have different electrical performance?

A: The CD74ACT05E has a slightly higher maximum propagation delay (10.8ns versus 8.5ns at 5V, 50pF load). This difference is within the 74ACT logic family tolerance and does not affect functional compatibility for standard applications. The CD74ACT05E also supports a wider operating temperature range (-55°C ~ 125°C).

Q: Are there RoHS-compliant alternatives available?

A: Neither the MC74ACT05N nor the CD74ACT05E is RoHS compliant. The MC74ACT08DG achieves ROHS3 compliance but is not functionally equivalent. For RoHS-compliant inverter solutions, alternative part numbers outside the provided dataset would be required.

Q: What is the difference in packaging between these parts?

A: The MC74ACT05N and CD74ACT05E both use 14-DIP (0.300", 7.62mm) through-hole packaging, suitable for traditional PCB designs with through-hole mounting. The MC74ACT08DG uses 14-SOIC (0.154", 3.90mm Width) surface mount packaging, requiring different PCB layout and assembly processes.