CD74AC04E-NG Equivalent & Substitute Parts

Part Overview

The CD74AC04E-NG is a 6-channel inverter logic integrated circuit manufactured by Texas Instruments, housed in a 14-pin DIP package for through-hole mounting. This device performs basic logic inversion across six independent channels, each with a single input. The part is classified as obsolete, indicating it has been discontinued from active production. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability for production, and support long-term system maintenance where through-hole or surface-mount alternatives may be required.

Substiute Parts

CD74AC04E-NG

Texas InstrumentsIn Stock: 792CD74AC04E-NG Datasheet

Current PartRFQ

SN74AC04PWR

Texas InstrumentsIn Stock: 2716SN74AC04PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74AC04E-NG is determined by the following critical parameters:

Functional Equivalence: Both the main part and substitute must be 6-channel inverter logic circuits with identical logic function and circuit count.

Electrical Compatibility: Supply voltage range, output current capability, and propagation delay characteristics must support the application requirements. The substitute must operate within the specified voltage and temperature ranges of the original design.

Package and Mounting Consideration: The CD74AC04E-NG uses through-hole mounting (14-DIP). Substitutes may employ surface-mount technology (14-TSSOP) if the PCB design accommodates surface-mount components, or alternative through-hole packages if available within the same logic family.

Series Consistency: Both parts belong to the 74AC logic family, ensuring consistent electrical characteristics and pin functionality.

Compliance Status: RoHS3 compliance is maintained across both the original and substitute parts.

The SN74AC04PWR qualifies as a manufacturer-recommended substitute based on identical logic function, matching output current specifications, compatible voltage operation, and active product status with superior availability.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The CD74AC04E-NG is obsolete with limited remaining inventory (683 pieces). The SN74AC04PWR is an active product with significantly higher availability (2674 pieces), making it the preferred choice for new designs and ongoing production requirements.

Compliance and Certification: Both parts maintain ROHS3 compliance, satisfying environmental and regulatory requirements. The SN74AC04PWR includes additional compliance documentation (REACH Unaffected, ECCN: EAR99, HTSUS: 8542.39.0001), supporting international supply chain requirements.

Electrical Performance: The SN74AC04PWR demonstrates superior quiescent current performance (2 µA versus 4 µA) and operates within an expanded voltage range (2V ~ 6V versus 1.5V ~ 5.5V). Propagation delay increases marginally (7ns versus 6.5ns), remaining within acceptable timing tolerances for most applications.

Packaging and Integration: Selection between through-hole (14-DIP) and surface-mount (14-TSSOP) depends on PCB design architecture. Through-hole mounting is suitable for prototyping and legacy systems. Surface-mount technology (14-TSSOP) supports modern high-density PCB layouts and automated assembly processes.

Temperature Range: The CD74AC04E-NG supports extended temperature operation (-55°C ~ 125°C), while the SN74AC04PWR operates within -40°C ~ 85°C. Applications requiring extreme temperature performance must retain the original part or identify alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the SN74AC04PWR directly replace the CD74AC04E-NG in existing designs?

A: Functional replacement is possible if the PCB design accommodates surface-mount components and the operating temperature range (-40°C ~ 85°C) meets application requirements. Pin functionality and logic operation are identical. Through-hole mounting designs require PCB redesign or alternative through-hole packages.

Q: What is the significance of the "Number of Inputs" difference (6 versus 1)?

A: Both parts contain 6 inverter circuits. The parameter designation reflects internal architecture documentation. Each inverter circuit has one input and one output regardless of the parameter listing. Functional equivalence is maintained.

Q: Are there compatibility concerns with the expanded voltage range of the SN74AC04PWR?

A: The SN74AC04PWR operates within 2V ~ 6V, which encompasses the CD74AC04E-NG range of 1.5V ~ 5.5V. Applications operating below 2V require the original part or alternative solutions. Standard 5V logic systems are fully compatible.

Q: How does the propagation delay difference affect circuit timing?

A: The 0.5ns increase (6.5ns to 7ns) is negligible for most digital logic applications. High-speed timing-critical designs operating near maximum frequency specifications should evaluate the impact through simulation or testing.

Q: What is the moisture sensitivity level (MSL) and why does it differ?

A: MSL indicates moisture absorption during storage and handling. The CD74AC04E-NG (Not Applicable) is through-hole mounted with minimal moisture sensitivity. The SN74AC04PWR (MSL 1 - Unlimited) is surface-mount with standard moisture handling requirements. Both are suitable for standard industrial environments with appropriate storage conditions.

Q: Is the SN74AC04PWR available in through-hole packaging?

A: The SN74AC04PWR is specified in 14-TSSOP surface-mount packaging only. Alternative 74AC04 inverter variants in through-hole packages may exist within the Texas Instruments product line but are not listed in the provided substitute data.