74AC00SC NAND Gate IC Equivalent & Substitute Parts

Part Overview

The 74AC00SC is a quad 2-input NAND gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement. The 74AC series represents a standard logic family with consistent functional performance across multiple manufacturers and packaging variants.

Substiute Parts

74AC00SC

onsemiIn Stock: 359974AC00SC Datasheet

Current PartRFQ

MC74AC00DR2G

onsemiIn Stock: 18834MC74AC00DR2G Datasheet

DirectRFQ

MC74AC00DG

onsemiIn Stock: 1491MC74AC00DG Datasheet

SimilarRFQ

SN74AC00D

Texas InstrumentsIn Stock: 2492SN74AC00D Datasheet

DirectRFQ

SN74AC00DR

Texas InstrumentsIn Stock: 2479SN74AC00DR Datasheet

DirectRFQ

CD74AC00M

Harris CorporationIn Stock: 1946CD74AC00M Datasheet

SimilarRFQ

CD74AC00M96

Texas InstrumentsIn Stock: 5317CD74AC00M96 Datasheet

SimilarRFQ

SN74AC00NSR

Texas InstrumentsIn Stock: 3463SN74AC00NSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74AC00SC is determined by the following criteria:

Functional Equivalence: All substitute parts maintain identical logic function (quad 2-input NAND gate), circuit count (4), and input configuration (2 inputs per gate).

Electrical Compatibility: Substitute parts must operate within the supply voltage range of 2V to 6V and maintain compatible input/output logic levels and propagation delay characteristics.

Package Compatibility: Primary substitutes utilize the 14-SOIC (0.154", 3.90mm Width) package for direct board-level replacement. Secondary substitutes may use alternative 14-pin SOIC variants (14-SO with 0.209", 5.30mm Width) requiring PCB layout verification.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and surface mount mounting type.

Substitute parts are categorized as:

• Direct Substitutes: Identical electrical specifications and 14-SOIC (0.154") packaging
• Similar Substitutes: Functionally equivalent with minor electrical parameter variations or alternative 14-pin SOIC packaging

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - Direct Substitutes (Active Status, ROHS3 Compliant):

SN74AC00DR (Texas Instruments) and MC74AC00DR2G (onsemi) are the preferred direct substitutes. Both parts are active products with ROHS3 compliance, identical electrical specifications to the 74AC00SC within the critical parameters (voltage supply 2V-6V, propagation delay 8ns @ 5V, 50pF), and 14-SOIC (0.154") packaging for direct board replacement. SN74AC00DR offers extended temperature range (-40°C to 85°C) matching the original part, while MC74AC00DR2G provides enhanced temperature performance (-55°C to 125°C).

Secondary Recommendation - Similar Substitutes (Active Status, ROHS3 Compliant):

CD74AC00M96 (Texas Instruments) is an active ROHS3-compliant alternative with slightly different electrical specifications. This part operates within a narrower supply voltage range (1.5V to 5.5V) and exhibits faster propagation delay (7.3ns @ 5V, 50pF). Compatibility requires verification that the design supply voltage remains within 1.5V to 5.5V and that faster propagation delay does not introduce timing conflicts.

SN74AC00NSR (Texas Instruments) is an active ROHS3-compliant part with identical electrical specifications to the 74AC00SC. The package variant (14-SO with 0.209" width versus 14-SOIC with 0.154" width) requires PCB layout verification for pin-to-pin compatibility and thermal performance.

Not Recommended:

CD74AC00M (Harris Corporation) is obsolete and RoHS non-compliant, making it unsuitable for new designs or compliance-sensitive applications.

SN74AC00D (Texas Instruments) is discontinued at DiGi Electronics, limiting procurement viability.

MC74AC00DG (onsemi) is functionally equivalent but offers no advantage over MC74AC00DR2G for new procurement.

Frequently Asked Questions (FAQ)

Q: Can MC74AC00DR2G directly replace 74AC00SC on the PCB?

A: Yes. Both parts use 14-SOIC (0.154", 3.90mm Width) packaging with identical pin configuration. The higher quiescent current specification (4 µA versus 2 µA) and extended operating temperature range (-55°C to 125°C versus -40°C to 85°C) represent improvements over the original part and do not create compatibility issues.

Q: What is the difference between MC74AC00DR2G and MC74AC00DG?

A: Both parts are functionally and electrically identical. The difference is packaging format: MC74AC00DR2G is supplied in Tape & Reel format for automated assembly, while MC74AC00DG is supplied in Tube format for manual handling. Selection depends on assembly process requirements.

Q: Is SN74AC00NSR compatible with the original 74AC00SC design?

A: SN74AC00NSR is functionally equivalent with identical electrical specifications. However, the package variant (14-SO with 0.209" width versus 14-SOIC with 0.154" width) requires PCB layout verification. Pin spacing and thermal characteristics may differ, necessitating design review before implementation.

Q: Why is CD74AC00M96 listed as a similar substitute rather than a direct substitute?

A: CD74AC00M96 operates within a different supply voltage range (1.5V to 5.5V versus 2V to 6V) and exhibits faster propagation delay (7.3ns versus 8ns). While functionally equivalent, these electrical