CD74HCT20MT NAND Gate IC Equivalent & Substitute Parts

Part Overview

The CD74HCT20MT is a dual 4-input NAND gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This component is classified as Last Time Buy, indicating limited availability from the original manufacturer. The CD74HCT20MT operates within the 74HCT logic family standard, providing two independent NAND gate circuits with 4 inputs each. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this logic function.

Substiute Parts

CD74HCT20MT

Texas InstrumentsIn Stock: 1623CD74HCT20MT Datasheet

Current PartRFQ

CD74HCT20M96

Texas InstrumentsIn Stock: 2867CD74HCT20M96 Datasheet

Parametric EquivalentRFQ

MC74HCT20ADR2G

onsemiIn Stock: 918MC74HCT20ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD74HCT20MT is determined by strict equivalence across the following critical parameters:

• Logic function: NAND gate with identical circuit configuration (2 channels, 4 inputs per channel)
• Supply voltage range: 4.5V ~ 5.5V
• Package type: 14-SOIC surface mount
• Operating temperature range: -55°C ~ 125°C
• Electrical characteristics: Input/output logic levels, quiescent current, and propagation delay within acceptable tolerances
• Compliance standards: RoHS3 and REACH status

The substitute parts identified below meet these criteria and are drawn from the same 74HCT logic family standard.

Parameter Comparison

Engineering Selection Recommendations

CD74HCT20M96 (Parametric Equivalent - Preferred)

The CD74HCT20M96 is the primary substitute for the CD74HCT20MT. Both parts are manufactured by Texas Instruments and share identical electrical specifications, including quiescent current (2 µA) and propagation delay (28ns @ 4.5V, 50pF). The CD74HCT20M96 maintains Active product status, ensuring ongoing availability and supply chain stability. This part is ROHS3 compliant and carries unlimited moisture sensitivity rating, matching the original specification exactly.

MC74HCT20ADR2G (MFR Recommended - Limited Suitability)

The MC74HCT20ADR2G, manufactured by onsemi, provides functional equivalence as a 2-channel 4-input NAND gate in 14-SOIC packaging. However, this part carries Obsolete product status, indicating discontinued manufacturing and limited stock availability. Additionally, the quiescent current specification is elevated at 10 µA compared to 2 µA for the primary part, and propagation delay is increased to 42ns @ 5V. These differences may impact power consumption and timing-critical applications. This part is ROHS3 compliant and suitable only when the CD74HCT20M96 is unavailable and application timing margins permit the increased propagation delay.

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT20M96 be used as a direct replacement for the CD74HCT20MT?

A: Yes. The CD74HCT20M96 is a parametric equivalent with identical electrical specifications, package type, and compliance certifications. No circuit modifications are required for substitution.

Q: What are the key differences between the CD74HCT20MT and MC74HCT20ADR2G?

A: The MC74HCT20ADR2G has higher quiescent current (10 µA vs. 2 µA) and longer propagation delay (42ns @ 5V vs. 28ns @ 4.5V). The MC74HCT20ADR2G is also Obsolete, limiting future availability. These differences may affect power consumption and timing performance in delay-sensitive circuits.

Q: Are all substitute parts in the same package?

A: Yes. All parts listed—CD74HCT20MT, CD74HCT20M96, and MC74HCT20ADR2G—use 14-SOIC surface mount packaging with identical physical dimensions (0.154", 3.90mm Width). PCB layout and footprints are interchangeable.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. All parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. Compliance certifications are equivalent across all three parts.

Q: Which substitute should be selected for new designs?

A: The CD74HCT20M96 is the recommended choice for new designs due to its Active product status, identical electrical performance, and assured long-term availability from Texas Instruments.