74AC04PC Equivalent & Substitute Parts

Part Overview

The 74AC04PC is a 6-channel inverter logic IC manufactured by onsemi in a 14-MDIP package. This component performs basic logic inversion operations across six independent channels, each with a single input. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, maintenance, and new design implementations where this logic function is required.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	24mA, 24mA
Max Propagation Delay @ V, Max CL	7ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)

Substitute Part Grouping Explanation

Substitution for the 74AC04PC is determined by strict equivalence across the following critical parameters:

Logic function: 6-channel inverter with single input per channel
Supply voltage range: 2V ~ 6V minimum requirement
Output drive capability: 24mA minimum for both high and low states
Propagation delay: 7ns maximum at 5V with 50pF load
Package type: 14-DIP through-hole configuration with 0.300" (7.62mm) pitch
Pin count and pinout: 14-pin DIP package

The substitute parts are grouped into two categories based on their relationship to the main part:

Direct Substitute (SN74AC04N): Meets all electrical and mechanical parameters within the specified tolerances. Functionally interchangeable at the circuit level.

Similar Substitute (CD74AC04E): Meets core logic function and package requirements but exhibits variations in certain electrical parameters that require engineering evaluation for specific applications.

Parameter Comparison

Parameter	74AC04PC (onsemi)	SN74AC04N (Texas Instruments)	CD74AC04E (Harris Corporation)
Logic Type	Inverter	Inverter	Inverter
Number of Circuits	6	6	6
Number of Inputs	1	1	1
Voltage - Supply	2V ~ 6V	2V ~ 6V	1.5V ~ 5.5V
Current - Quiescent (Max)	2 µA	2 µA	4 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA
Input Logic Level - Low	0.9V ~ 1.65V	0.9V ~ 1.65V	0.3V ~ 1.65V
Input Logic Level - High	2.1V ~ 3.85V	2.1V ~ 3.85V	1.2V ~ 3.85V
Max Propagation Delay @ V, Max CL	7ns @ 5V, 50pF	7ns @ 5V, 50pF	6.5ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)
Product Status	Obsolete	Active	Obsolete

Engineering Selection Recommendations

SN74AC04N (Texas Instruments) is the primary substitute for the 74AC04PC. This part maintains identical electrical specifications across all critical parameters including supply voltage range, quiescent current, output drive capability, propagation delay, and operating temperature range. The SN74AC04N is currently in active production status, ensuring long-term availability and supply chain reliability. The part is RoHS3 compliant, meeting modern environmental and regulatory requirements. Pin-for-pin compatibility and identical package configuration enable direct replacement without circuit modification.

CD74AC04E (Harris Corporation) provides functional equivalence as a secondary option. While this part maintains the same logic function, package type, and output drive specifications, it exhibits parameter variations that require consideration. The CD74AC04E operates across a wider supply voltage range (1.5V ~ 5.5V) and extended temperature range (-55°C ~ 125°C), offering broader environmental tolerance. However, the part is obsolete and carries higher quiescent current (4 µA versus 2 µA). The CD74AC04E is RoHS non-compliant, which may conflict with modern procurement and environmental standards. Selection of this part should be limited to legacy system maintenance where supply voltage and temperature specifications align with application requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74AC04N be used as a direct replacement for 74AC04PC without circuit modification?

A: Yes. The SN74AC04N is pin-for-pin compatible with identical electrical specifications. No circuit changes are required for substitution.

Q: What is the primary difference between the direct substitute and similar substitute?

A: The SN74AC04N matches all electrical parameters of the 74AC04PC and is in active production. The CD74AC04E is functionally equivalent but exhibits variations in supply voltage range, quiescent current, and temperature operating range, and is obsolete.

Q: Is the CD74AC04E suitable for new designs?

A: The CD74AC04E is obsolete and RoHS non-compliant. For new designs, the SN74AC04N is the recommended choice. The CD74AC04E may be considered only for legacy system maintenance where its extended temperature range provides specific value.

Q: Are there package compatibility concerns when substituting these parts?

A: All three parts use identical 14-DIP through-hole packages with 0.300" (7.62mm) pitch. Package compatibility is assured across all substitutions.

Q: What compliance certifications should be considered for part selection?

A: The SN74AC04N is RoHS3 compliant and REACH unaffected. The CD74AC04E is RoHS non-compliant. For applications requiring environmental compliance, the SN74AC04N is the appropriate selection.

Q: Does quiescent current difference between parts affect circuit performance?

A: The CD74AC04E draws 4 µA maximum quiescent current compared to 2 µA for both the 74AC04PC and SN74AC04N. In low-power applications, this difference may be significant. For standard applications, the difference is negligible.

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