CD74HC4020M Equivalent & Substitute Parts

Part Overview

The CD74HC4020M is a 14-bit binary counter logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This device functions as a negative edge-triggered counter with asynchronous reset capability, operating across a supply voltage range of 2V to 6V and a temperature range of -55°C to 125°C. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity.

Substiute Parts

CD74HC4020M

Texas InstrumentsIn Stock: 2387CD74HC4020M Datasheet

Current PartRFQ

CD74HC4020M96

Texas InstrumentsIn Stock: 15557CD74HC4020M96 Datasheet

DirectRFQ

CD74HC4060M

Texas InstrumentsIn Stock: 1951CD74HC4060M Datasheet

Parametric EquivalentRFQ

MC74HC4020ADG

onsemiIn Stock: 1962MC74HC4020ADG Datasheet

DirectRFQ

74HC4020D,653

NXP SemiconductorsIn Stock: 3624074HC4020D,653 Datasheet

MFR RecommendedRFQ

MC74HC4020ADR2G

onsemiIn Stock: 3693MC74HC4020ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HC4020M is determined by strict equivalence across the following critical parameters: logic type (binary counter), bit width (14-bit), trigger mechanism (negative edge), reset configuration (asynchronous), supply voltage range (2V to 6V), operating temperature range (-55°C to 125°C), package type (16-SOIC), and mounting technology (surface mount).

Substitute parts are grouped into two categories:

Direct Substitutes (Packaging Variant): Parts maintaining identical electrical specifications and base product number (74HC4020) but differing in packaging format or manufacturer.

Parametric Equivalents (Functional Equivalent): Parts with identical electrical performance characteristics but different base product numbers, such as the 74HC4060 series, which maintain the same counter architecture and operational parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CD74HC4020M96 (Texas Instruments) is the recommended direct substitute. This part maintains identical electrical specifications and base product number as the CD74HC4020M while offering active product status and improved availability. The packaging format differs (Cut Tape versus Tube), but electrical performance and pinout compatibility remain unchanged.

Secondary Substitutes: MC74HC4020ADR2G (onsemi) provides functional equivalence with identical 14-bit counter architecture and operating parameters. This part carries Last Time Buy status and is available in Cut Tape & Digi-Reel packaging. The onsemi variant specifies a higher count rate of 50 MHz, which exceeds the original 35 MHz specification and maintains backward compatibility.

Alternative Equivalent: CD74HC4060M (Texas Instruments) functions as a parametric equivalent with identical electrical characteristics, supply voltage, temperature range, and count rate. This part is classified as Last Time Buy and represents an alternative when the 74HC4020 base product number is unavailable.

NXP Option: 74HC4020D,653 (NXP Semiconductors) maintains the 74HC4020 base product number and active product status. Limited parametric data is provided for this bulk-packaged variant; verification of electrical specifications against design requirements is necessary before selection.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status, ensuring regulatory and environmental compatibility with the original CD74HC4020M.

Frequently Asked Questions (FAQ)

Q: Can CD74HC4020M96 be used as a direct replacement for CD74HC4020M?

A: Yes. CD74HC4020M96 maintains identical electrical specifications, pinout, and functional performance. The difference is packaging format: CD74HC4020M96 is supplied in Cut Tape format while CD74HC4020M is supplied in Tube format. Both are 16-SOIC surface mount packages with identical dimensions and pin assignments.

Q: What is the difference between CD74HC4020M and CD74HC4060M?

A: Both are 14-bit binary counters with identical electrical performance, supply voltage range, operating temperature, and count rate. The base product number differs (4020 versus 4060), indicating different internal counter configurations. CD74HC4060M is functionally equivalent and can substitute when 74HC4020 variants are unavailable.

Q: Why do onsemi parts (MC74HC4020ADG, MC74HC4020ADR2G) specify 50 MHz count rate instead of 35 MHz?

A: The onsemi variants specify a higher maximum count rate of 50 MHz. This represents a performance enhancement over the original 35 MHz specification. Parts with higher count rate ratings maintain backward compatibility and can operate at the original 35 MHz specification without functional degradation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, ensuring compatibility with RoHS3 regulated applications and procurement requirements.

Q: What packaging options are available for 74HC4020 binary counters?

A: Available packaging formats include Tube (CD74HC4020M), Cut Tape (CD74HC4020M96), Cut Tape & Digi-Reel (MC74HC4020ADR2G), and Bulk (74HC4020D,653). All maintain identical 16-SOIC package dimensions and surface mount mounting type.

Q: Can NXP 74HC4020D,653 be used without additional verification?

A: The NXP part maintains the 74HC4020 base product number and active product status. However, limited parametric data is provided in the specification. Verification of electrical specifications, particularly count rate and supply voltage characteristics, against design requirements is recommended before final selection.

Q: What is the significance of "Last Time Buy" status for CD74HC4060M and MC74HC4020ADR2G?

A: Last Time Buy status indicates these parts are in final production phases with limited availability. Procurement should prioritize these parts if long-term supply is required, or transition to Active status alternatives such as CD74HC4020M96 or 74HC4020D,653.