CD74HCT20M NAND Gate IC Equivalent & Substitute Parts

Part Overview

The CD74HCT20M is a dual 4-input NAND gate logic IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This component is classified as Last Time Buy, indicating limited availability from the original manufacturer. The CD74HCT20M operates within the 74HCT logic family standard, providing two independent NAND gate circuits with 4 inputs each. Identifying equivalent and substitute parts is necessary due to product status constraints and to ensure design flexibility for procurement and production planning.

Substiute Parts

CD74HCT20M

Texas InstrumentsIn Stock: 2162CD74HCT20M Datasheet

Current PartRFQ

CD74HCT20M96

Texas InstrumentsIn Stock: 2867CD74HCT20M96 Datasheet

MFR RecommendedRFQ

MC74HCT20ADR2G

onsemiIn Stock: 918MC74HCT20ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HCT20M is determined by the following critical parameters:

• Logic function: NAND gate with identical circuit count (2) and input configuration (4 inputs per gate)
• Package compatibility: 14-SOIC surface mount form factor
• Electrical specifications: Supply voltage range 4.5V ~ 5.5V, operating temperature -55°C ~ 125°C
• Compliance standards: ROHS3 compliance and MSL rating of 1

The identified substitute parts maintain these core parameters, ensuring functional and mechanical interchangeability within the specified design constraints.

Parameter Comparison

Engineering Selection Recommendations

CD74HCT20M96 is the primary substitute option. This part is manufactured by Texas Instruments and maintains Active product status, ensuring continued availability and support. Electrical and timing specifications are identical to the main part, with packaging and compliance certifications matching exactly. The Tape & Reel packaging format provides standard production-grade delivery.

MC74HCT20ADR2G is a secondary substitute manufactured by onsemi. While functionally equivalent in logic configuration and package form factor, this part carries Obsolete product status, indicating limited future availability. Additionally, quiescent current is specified at 10 µA compared to 2 µA for the primary options, and propagation delay is 42ns at 5V versus 28ns at 4.5V. These differences may impact power consumption and timing-critical applications. ROHS3 compliance and MSL rating remain consistent with primary specifications.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT20M96 be used as a direct replacement for CD74HCT20M?

A: Yes. Both parts are manufactured by Texas Instruments with identical electrical specifications, logic configuration, and 14-SOIC package dimensions. The primary difference is packaging format: CD74HCT20M is supplied in Tube, while CD74HCT20M96 is supplied in Tape & Reel. Functional performance and pin compatibility are equivalent.

Q: What are the differences between CD74HCT20M96 and MC74HCT20ADR2G?

A: Both parts provide the same NAND gate logic function in 14-SOIC packaging. Key differences include: manufacturer (Texas Instruments vs. onsemi), product status (Active vs. Obsolete), quiescent current (2 µA vs. 10 µA), and propagation delay (28ns vs. 42ns). The onsemi part is suitable for applications where higher quiescent current and longer propagation delay are acceptable.

Q: Is the 14-SOIC package identical across all three parts?

A: Yes. All three parts use the 14-SOIC package with 0.154" width and 3.90mm physical dimensions, ensuring mechanical and electrical pin compatibility on PCB layouts.

Q: Are all substitute parts RoHS compliant?

A: Yes. CD74HCT20M, CD74HCT20M96, and MC74HCT20ADR2G are all ROHS3 compliant with MSL rating of 1 (Unlimited), meeting environmental and regulatory requirements.

Q: Why is MC74HCT20ADR2G marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. While existing inventory may be available, future procurement cannot be guaranteed. For new designs or long-term production, CD74HCT20M96 is the recommended choice due to Active status.