CD74HCT4020M Equivalent & Substitute Parts

Part Overview

The CD74HCT4020M is a 14-bit binary counter logic IC 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 at a maximum count rate of 25 MHz across a supply voltage range of 4.5 V to 5.5 V and temperature range of -55°C to 125°C. The part is designated as Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity and procurement availability for applications requiring 14-bit binary counter functionality.

Substiute Parts

CD74HCT4020M

Texas InstrumentsIn Stock: 1631CD74HCT4020M Datasheet

Current PartRFQ

CD74HCT4020M96

Texas InstrumentsIn Stock: 3909CD74HCT4020M96 Datasheet

MFR RecommendedRFQ

74HCT4020D,653

Nexperia USA Inc.In Stock: 322474HCT4020D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HCT4020M is determined by strict equivalence across the following critical parameters: logic type (binary counter), bit width (14-bit), counting direction (up), trigger mechanism (negative edge), reset type (asynchronous), package form factor (16-SOIC), and supply voltage compatibility (4.5 V ~ 5.5 V). All substitute parts must maintain identical functional specifications and physical packaging to ensure direct replacement without circuit redesign. The count rate and operating temperature range may vary within acceptable limits provided the substitute meets or exceeds the minimum requirements of the original design specification.

Parameter Comparison

Engineering Selection Recommendations

CD74HCT4020M96 is the manufacturer-recommended primary substitute, maintaining identical electrical specifications and temperature range while offering active product status and improved availability in Tape & Reel packaging format. This part is sourced from the same manufacturer (Texas Instruments) and provides direct functional equivalence.

74HCT4020D,653 manufactured by Nexperia USA Inc. is a secondary substitute option. This part maintains all critical functional parameters and package form factor. The count rate specification of 47 MHz exceeds the original 25 MHz requirement, and the operating temperature range of -40°C to 125°C is narrower at the lower bound. Selection of this part is appropriate for applications where the lower temperature limit of -40°C is acceptable and where Nexperia sourcing is preferred. All substitute parts maintain ROHS3 compliance and MSL Level 1 rating consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT4020M96 be used as a direct replacement for CD74HCT4020M?

A: Yes. CD74HCT4020M96 is functionally equivalent across all critical parameters: 14-bit binary counter, negative edge trigger, asynchronous reset, 25 MHz count rate, 4.5 V to 5.5 V supply voltage, -55°C to 125°C operating temperature, and 16-SOIC package. The only difference is packaging format (Tape & Reel versus Tube) and active product status.

Q: What are the differences between CD74HCT4020M96 and 74HCT4020D,653?

A: Both parts are functionally equivalent 14-bit binary counters in 16-SOIC packages. CD74HCT4020M96 is manufactured by Texas Instruments with -55°C to 125°C temperature range. 74HCT4020D,653 is manufactured by Nexperia with -40°C to 125°C temperature range and 47 MHz count rate. Selection depends on temperature requirements and manufacturer preference.

Q: Is the 16-SOIC package identical between all three parts?

A: Yes. All three parts use the 16-SOIC package with 0.154" width and 3.90mm physical dimensions, ensuring identical PCB footprint and pin compatibility.

Q: Does the higher count rate of 74HCT4020D,653 affect compatibility?

A: No. The 47 MHz count rate of 74HCT4020D,653 exceeds the 25 MHz specification of the original part. This represents improved performance and does not create compatibility issues for applications designed for the original 25 MHz specification.

Q: Are all substitute parts RoHS compliant?

A: Yes. CD74HCT4020M, CD74HCT4020M96, and 74HCT4020D,653 are all ROHS3 compliant with MSL Level 1 rating.