CD74AC00E-NG NAND Gate IC Equivalent & Substitute Parts

Part Overview

The CD74AC00E-NG is a 4-channel 2-input NAND gate logic IC manufactured by Texas Instruments in 14-PDIP through-hole packaging. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement. The 74AC series NAND gate provides standard logic switching functionality across industrial and commercial applications requiring TTL-compatible signal processing.

Substiute Parts

CD74AC00E-NG

Texas InstrumentsIn Stock: 883CD74AC00E-NG Datasheet

Current PartRFQ

SN74AC00PWR

Texas InstrumentsIn Stock: 30509SN74AC00PWR Datasheet

MFR RecommendedRFQ

CD74AC00E

Harris CorporationIn Stock: 1564CD74AC00E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74AC00E-NG are classified based on functional equivalence within the 74AC NAND gate family. Substitution eligibility is determined by the following criteria:

Functional Parameters (Must Match):

• Logic Type: NAND Gate
• Number of Circuits: 4
• Number of Inputs: 2
• Output Current Capability: 24mA minimum (both high and low)

Electrical Parameters (Must Be Compatible):

• Supply voltage range must overlap with or exceed the original specification
• Propagation delay specifications must meet or exceed performance requirements
• Input logic levels must be compatible with system signal levels

Physical Parameters (Application-Dependent):

• Mounting type (through-hole vs. surface mount) determines PCB integration method
• Package type affects board layout and assembly process

The identified substitutes maintain functional equivalence through identical logic configuration (4 NAND gates, 2 inputs each) and compatible electrical characteristics within the 74AC series specification.

Parameter Comparison

Engineering Selection Recommendations

SN74AC00PWR (Recommended for New Designs):

The SN74AC00PWR is the primary recommended substitute for the CD74AC00E-NG. This part is manufactured by Texas Instruments with active product status, ensuring long-term availability and supply chain stability. The SN74AC00PWR maintains functional equivalence through identical logic configuration and compatible electrical parameters. The extended supply voltage range (2V ~ 6V) provides broader operational flexibility compared to the original specification. Quiescent current is reduced to 2 µA, offering improved power efficiency. The part carries ROHS3 compliance certification, meeting modern environmental and regulatory requirements.

The SN74AC00PWR uses 14-TSSOP surface-mount packaging, which requires PCB redesign for assembly integration. This packaging format is standard in contemporary electronics manufacturing and provides reduced board footprint compared to through-hole DIP packages.

CD74AC00E (Parametric Equivalent for Through-Hole Applications):

The CD74AC00E provides direct parametric equivalence to the CD74AC00E-NG, maintaining identical electrical specifications and through-hole 14-DIP packaging. This part is manufactured by Harris Corporation and carries obsolete product status. The CD74AC00E is suitable for applications requiring through-hole assembly without PCB redesign. However, this part does not carry ROHS3 compliance certification, which may restrict use in applications subject to environmental regulations or customer compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74AC00PWR directly replace the CD74AC00E-NG without circuit modification?

A: The SN74AC00PWR is functionally equivalent in logic operation and electrical performance. However, it uses 14-TSSOP surface-mount packaging instead of 14-DIP through-hole packaging. Direct PCB substitution is not possible without redesigning the board layout and assembly process. The electrical parameters are compatible with the original design.

Q: What is the difference between the CD74AC00E and CD74AC00E-NG?

A: Both parts are manufactured by Texas Instruments in the 74AC series with identical electrical specifications and 14-DIP through-hole packaging. The primary difference is packaging format: CD74AC00E uses tube packaging, while CD74AC00E-NG uses DIP packaging. Both are classified as obsolete products.

Q: Does the SN74AC00PWR meet RoHS compliance requirements?

A: Yes, the SN74AC00PWR carries ROHS3 compliance certification. The CD74AC00E does not meet RoHS compliance standards. For applications requiring environmental compliance documentation, the SN74AC00PWR is the appropriate selection.

Q: Are there temperature range limitations when substituting the SN74AC00PWR?

A: The SN74AC00PWR operates across -40°C ~ 85°C, which is narrower than the original CD74AC00E-NG specification of -55°C ~ 125°C. Applications requiring operation below -40°C or above 85°C must use the CD74AC00E or CD74AC00E-NG. The CD74AC00E maintains the full -55°C ~ 125°C operating range.

Q: What is the propagation delay difference between substitutes?

A: The CD74AC00E-NG and CD74AC00E both specify 7.3ns maximum propagation delay at 5V with 50pF load. The SN74AC00PWR specifies 8ns under identical conditions. This 0.7ns difference is within typical logic circuit timing margins and does not affect functional compatibility in standard applications.

Q: Can I use the CD74AC00E as a direct replacement for the CD74AC00E-NG?

A: Yes, the CD74AC00E provides direct parametric and physical equivalence. Both use 14-DIP through-hole packaging and identical electrical specifications. However, the CD74AC00E does not carry ROHS3 compliance certification, which may be a consideration for regulated applications.