CD74HC4520M Binary Counter IC Equivalent & Substitute Parts

Part Overview

The CD74HC4520M is a dual 4-bit binary counter IC manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This logic component functions as a synchronous counter with asynchronous reset capability, supporting count rates up to 35 MHz across a 2V to 6V supply voltage range. The part is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Key Parameters

Parameter	Value
Logic Type	Binary Counter
Number of Elements	2
Number of Bits per Element	4
Direction	Up
Reset Type	Asynchronous
Timing	Synchronous
Count Rate	35 MHz
Trigger Type	Positive, Negative
Voltage Supply Range	2V to 6V
Operating Temperature Range	-55°C to 125°C
Package Type	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC4520M is determined by strict alignment with the following critical parameters:

Functional Architecture: Dual 4-bit binary counter with identical element and bit configuration
Logic Characteristics: Synchronous timing with asynchronous reset, supporting both positive and negative trigger edges
Electrical Performance: Supply voltage range 2V to 6V, operating temperature -55°C to 125°C minimum
Physical Compatibility: 16-SOIC surface mount package with 0.154" (3.90mm) width
Regulatory Compliance: ROHS3 compliance and EAR99 classification

The identified substitute parts maintain functional and electrical equivalence within these parameters. Packaging format differences (Tube, Tape & Reel, Bulk) do not affect electrical or mechanical compatibility and represent alternative distribution methods for the same die and package configuration.

Parameter Comparison

Parameter	CD74HC4520M (Main)	CD74HC4520M96 (Substitute)	74HC4520D,118 (Substitute)
Manufacturer	Texas Instruments	Texas Instruments	NXP USA Inc.
Logic Type	Binary Counter	Binary Counter	Binary Counter
Number of Elements	2	2	2
Number of Bits per Element	4	4	4
Direction	Up	Up	Up
Reset Type	Asynchronous	Asynchronous	Asynchronous
Timing	Synchronous	Synchronous	Synchronous
Count Rate	35 MHz	35 MHz	69 MHz
Trigger Type	Positive, Negative	Positive, Negative	Positive, Negative
Voltage Supply Range	2V to 6V	2V to 6V	2V to 6V
Operating Temperature Range	-55°C to 125°C	-55°C to 125°C	-40°C to 125°C
Package Type	16-SOIC	16-SOIC	16-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Last Time Buy	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified
Packaging Format	Tube	Tape & Reel	Bulk

Engineering Selection Recommendations

CD74HC4520M96 (Texas Instruments, Tape & Reel packaging) is the primary substitute for the CD74HC4520M. Both parts are manufactured by Texas Instruments, share identical electrical specifications and package geometry, and maintain ROHS3 compliance. The difference in packaging format (Tape & Reel versus Tube) reflects distribution method only and does not affect component functionality or compatibility. This part carries Active product status, ensuring continued availability.

74HC4520D,118 (NXP USA Inc., Bulk packaging) provides functional equivalence with the following considerations: The part maintains identical logic architecture, trigger characteristics, and supply voltage range. The operating temperature range is narrower (-40°C to 125°C versus -55°C to 125°C), which may be acceptable depending on application requirements. The count rate specification of 69 MHz exceeds the original 35 MHz requirement, providing performance margin. This part also carries Active product status. Regulatory compliance documentation should be verified for specific application requirements.

Selection between substitute parts should be based on packaging requirements, supply chain preferences, and temperature range specifications for the target application.

Frequently Asked Questions (FAQ)

Q: Can CD74HC4520M96 be used as a direct replacement for CD74HC4520M?

A: Yes. Both parts are manufactured by Texas Instruments with identical electrical specifications, package type (16-SOIC), and pin configuration. The only difference is packaging format (Tape & Reel versus Tube), which does not affect electrical or mechanical compatibility.

Q: What is the difference between the substitute parts?

A: CD74HC4520M96 and 74HC4520D,118 differ in manufacturer (Texas Instruments versus NXP), operating temperature range (CD74HC4520M96 supports -55°C to 125°C; 74HC4520D,118 supports -40°C to 125°C), and count rate specification (35 MHz versus 69 MHz). Both maintain identical logic function and package configuration.

Q: Does the narrower temperature range of 74HC4520D,118 affect compatibility?

A: Compatibility depends on application requirements. If the design operates within -40°C to 125°C, the 74HC4520D,118 is suitable. Applications requiring operation below -40°C require CD74HC4520M96 or the original CD74HC4520M.

Q: Are packaging format differences (Tube, Tape & Reel, Bulk) significant?

A: Packaging format affects handling, storage, and assembly processes but does not affect component electrical performance or mechanical fit. Selection should be based on manufacturing equipment compatibility and supply chain requirements.

Q: Why is the original CD74HC4520M marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued production. Substitute parts with Active status ensure long-term design continuity and supply availability.

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

A: CD74HC4520M and CD74HC4520M96 are both ROHS3 compliant. Compliance documentation for 74HC4520D,118 should be verified for specific regulatory requirements.

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