SN74AC00DBR NAND Gate IC Equivalent & Substitute Parts

Part Overview

The SN74AC00DBR is a 4-channel 2-input NAND gate logic IC manufactured by Texas Instruments in 14-SSOP surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The SN74AC00DBR serves as a fundamental building block in digital logic circuits requiring NAND gate functionality with AC-series speed and power characteristics.

Substiute Parts

SN74AC00DBR

Texas InstrumentsIn Stock: 1177SN74AC00DBR Datasheet

Current PartRFQ

74AC00MTC

onsemiIn Stock: 186474AC00MTC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74AC00DBR is determined by strict equivalence across the following critical parameters:

• Logic function: 4-channel 2-input NAND gate
• Electrical specifications: 2V ~ 6V supply voltage, 2 µA quiescent current, 24mA output drive, 8ns propagation delay at 5V with 50pF load
• Input/output logic levels: Low 0.9V ~ 1.65V, High 2.1V ~ 3.85V
• Operating temperature: -40°C ~ 85°C
• Base product series: 74AC00
• Compliance: ROHS3, MSL Level 1

The primary substitute identified is the 74AC00MTC manufactured by onsemi. This part maintains identical electrical and functional specifications while differing only in packaging format and supplier designation.

Parameter Comparison

Engineering Selection Recommendations

The 74AC00MTC from onsemi is a direct functional equivalent to the SN74AC00DBR. Both parts maintain identical electrical performance, logic specifications, and compliance certifications (ROHS3, MSL Level 1, REACH Unaffected, EAR99 classification).

The primary distinction between these parts is packaging format: the SN74AC00DBR uses 14-SSOP (0.209" width), while the 74AC00MTC uses 14-TSSOP (0.173" width). The TSSOP variant represents a thinner shrink of the SSOP package, resulting in reduced overall package dimensions while maintaining the same pin count and pitch.

Both parts are classified as obsolete. Selection between them depends on PCB layout compatibility with the respective package dimensions and existing design constraints. Electrical and thermal performance remain equivalent across both packaging options.

Frequently Asked Questions (FAQ)

Q: Can the 74AC00MTC directly replace the SN74AC00DBR in existing designs?

A: Electrical and functional replacement is complete. However, the package footprint differs: 14-SSOP versus 14-TSSOP. PCB layout compatibility must be verified before substitution. If the PCB is designed for 14-SSOP, the 14-TSSOP variant will not fit without layout modification.

Q: What is the difference between 14-SSOP and 14-TSSOP packaging?

A: Both are 14-pin surface mount packages with identical pin pitch and electrical characteristics. The TSSOP (Thin Shrink Small Outline Package) is narrower at 0.173" compared to SSOP at 0.209", reducing overall package width by approximately 17%.

Q: Are there any electrical performance differences between these substitutes?

A: No. Both parts maintain identical supply voltage range (2V ~ 6V), quiescent current (2 µA max), output drive capability (24mA), logic thresholds, and propagation delay (8ns @ 5V, 50pF).

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the SN74AC00DBR and 74AC00MTC are ROHS3 compliant, MSL Level 1, REACH Unaffected, and classified as EAR99 for export control purposes.

Q: Why is the SN74AC00DBR marked as obsolete?

A: Obsolete status indicates the part is no longer in active production by the manufacturer. Equivalent parts from other manufacturers or alternative package variants remain available for design continuity.