CD74AC20M NAND Gate IC Equivalent & Substitute Parts

Part Overview

The CD74AC20M 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 CD74AC20M operates across a supply voltage range of 1.5V to 5.5V and is suitable for general-purpose digital logic applications requiring NAND gate functionality with two independent channels.

Equivalent and substitute parts are necessary due to product lifecycle status and inventory availability. Alternative sources from active manufacturers provide continued access to functionally compatible NAND gate solutions in the same package configuration.

Substiute Parts

CD74AC20M

Texas InstrumentsIn Stock: 1822CD74AC20M Datasheet

Current PartRFQ

CD74AC20M96

Texas InstrumentsIn Stock: 8652CD74AC20M96 Datasheet

MFR RecommendedRFQ

MC74AC20DR2G

onsemiIn Stock: 1353MC74AC20DR2G Datasheet

DirectRFQ

MC74AC20DG

onsemiIn Stock: 4285MC74AC20DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74AC20M is determined by the following criteria:

Mandatory Compatibility Parameters:

• Logic Type: NAND Gate (2 channels, 4 inputs per channel)
• Package / Case: 14-SOIC surface mount configuration
• Mounting Type: Surface Mount
• Base Product Number: 74AC20 series

Electrical Operating Range: Substitute parts must support the required supply voltage, quiescent current, output current, and propagation delay specifications. Parts with overlapping or extended voltage ranges and equivalent or superior performance characteristics are considered compatible.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and equivalent moisture sensitivity levels to ensure manufacturing and environmental compatibility.

The CD74AC20M has two direct substitutes from active manufacturers: the Texas Instruments CD74AC20M96 (Tape & Reel packaging variant) and onsemi equivalents MC74AC20DR2G and MC74AC20DG.

Parameter Comparison

Engineering Selection Recommendations

CD74AC20M96 (Texas Instruments): This part is the direct equivalent to the CD74AC20M with identical electrical specifications and operating temperature range. The primary difference is packaging format (Tape & Reel versus Tube). CD74AC20M96 is in Active product status with higher inventory availability (8584 units), making it the preferred substitute when Tape & Reel packaging is acceptable for manufacturing processes.

MC74AC20DR2G (onsemi): This onsemi equivalent provides NAND gate functionality in 14-SOIC packaging with Active product status. The MC74AC20DR2G features a narrower supply voltage range (2V ~ 6V versus 1.5V ~ 5.5V) and restricted operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C). However, propagation delay performance is superior at 7ns compared to 12.2ns. This part is suitable for applications operating within the specified voltage and temperature constraints.

MC74AC20DG (onsemi): This onsemi equivalent offers identical electrical and performance characteristics to the MC74AC20DR2G, with the distinction of Tube packaging. MC74AC20DG is in Active product status with substantial inventory (4205 units). Selection between MC74AC20DR2G and MC74AC20DG depends on packaging requirements for assembly and distribution.

All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can the CD74AC20M96 be used as a direct replacement for the CD74AC20M?

A: Yes. The CD74AC20M96 is electrically and functionally identical to the CD74AC20M. Both parts share the same supply voltage range (1.5V ~ 5.5V), operating temperature range (-55°C ~ 125°C), propagation delay (12.2ns @ 5V, 50pF), and output current specifications. The only difference is packaging format: CD74AC20M is supplied in Tube, while CD74AC20M96 is supplied in Tape & Reel. Both are 14-SOIC surface mount packages with identical physical dimensions.

Q: What are the key differences between Texas Instruments and onsemi NAND gate substitutes?

A: The onsemi MC74AC20DR2G and MC74AC20DG parts have a narrower supply voltage operating range (2V ~ 6V) and restricted operating temperature range (-40°C ~ 85°C) compared to the Texas Instruments parts (1.5V ~ 5.5V supply, -55°C ~ 125°C operating temperature). However, onsemi parts offer superior propagation delay performance at 7ns versus 12.2ns. Input logic level thresholds also differ: onsemi parts specify 0.9V ~ 1.65V for low input and 2.1V ~ 3.85V for high input, while Texas Instruments parts specify 0.3V ~ 1.65V and 1.2V ~ 3.85V respectively. Selection depends on application voltage and temperature requirements.

Q: Are all substitute parts available in the same 14-SOIC package?

A: Yes. All substitute parts are manufactured in 14-SOIC (0.154", 3.90mm Width) surface mount packaging. Differences exist only in supply format: CD74AC20M and MC74AC20DG are supplied in Tube, CD74AC20M96 is supplied in Tape & Reel, and MC74AC20DR2G is supplied in Cut Tape with Digi-Reel option. The physical package dimensions and pin configuration are identical across all parts.

Q: Which substitute part should be selected for extended temperature applications?

A: The CD74AC20M96 (Texas Instruments) maintains the full operating temperature range of -55°C ~ 125°C, identical to the original CD74AC20M. The onsemi equivalents (MC74AC20DR2G and MC74AC20DG) are limited to -40°C ~ 85°C. For applications requiring operation below -40°C or above 85°C, the CD74AC20M96 is the appropriate substitute.

Q: Are all parts RoHS compliant?

A: Yes. All listed parts—CD74AC20M, CD74AC20M96, MC74AC20DR2G, and MC74AC20DG—are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). All parts are suitable for standard manufacturing environments without special handling requirements.