CD74HC4046AMG4 Equivalent & Substitute Parts

Part Overview

The CD74HC4046AMG4 is a Phase Lock Loop (PLL) integrated circuit manufactured by Texas Instruments, designed for clock and timing applications. This 16-SOIC surface mount device operates at a maximum frequency of 38MHz with CMOS input and output, supporting a 1:4 input-to-output ratio. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs.

Substiute Parts

CD74HC4046AMG4

Texas InstrumentsIn Stock: 732CD74HC4046AMG4 Datasheet

Current PartRFQ

CD74HC4046AM

Texas InstrumentsIn Stock: 1704CD74HC4046AM Datasheet

MFR RecommendedRFQ

CD74HC7046AM

Harris CorporationIn Stock: 2315CD74HC7046AM Datasheet

Parametric EquivalentRFQ

74HC4046AD,653

NXP SemiconductorsIn Stock: 7795474HC4046AD,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD74HC4046AMG4 is determined by the following critical parameters: PLL functionality, CMOS input/output compatibility, 16-SOIC package format, maximum frequency capability, supply voltage range, and operating temperature range. Substitute parts must maintain electrical compatibility within these specifications to ensure functional equivalence in clock and timing applications.

The identified substitute parts are grouped as follows:

MFR Recommended Substitute (Primary): CD74HC4046AM maintains identical electrical specifications and package format, with the distinction of active product status and tube packaging.

Parametric Equivalent: CD74HC7046AM provides PLL functionality in the same package with comparable electrical characteristics, though with a different input-to-output ratio (1:2 versus 1:4) and obsolete product status.

Alternative Substitute: 74HC4046AD,653 from NXP Semiconductors offers PLL functionality in the same package family with reduced maximum frequency (21MHz) and narrower supply voltage range (3V ~ 6V).

Parameter Comparison

Engineering Selection Recommendations

CD74HC4046AM is the primary recommended substitute. This part maintains full electrical equivalence with the original CD74HC4046AMG4, including identical frequency capability (38MHz), supply voltage range (2V ~ 6V), operating temperature range (-55°C ~ 125°C), and input-to-output ratio (1:4). The part holds active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance.

CD74HC7046AM provides parametric equivalence with the same package and frequency specifications. However, the 1:2 input-to-output ratio differs from the original 1:4 ratio, and the part is classified as obsolete. This option is suitable only when the different ratio meets application requirements and obsolescence risk is acceptable.

74HC4046AD,653 from NXP Semiconductors offers an alternative with active product status. The maximum frequency is reduced to 21MHz, and the supply voltage range is narrowed to 3V ~ 6V. This part is appropriate only for applications where the reduced frequency specification and narrower voltage range do not compromise system performance.

Frequently Asked Questions (FAQ)

Q: Can CD74HC4046AM directly replace CD74HC4046AMG4?

A: Yes. CD74HC4046AM is electrically and mechanically equivalent, with identical frequency (38MHz), supply voltage (2V ~ 6V), operating temperature (-55°C ~ 125°C), and input-to-output ratio (1:4) specifications. The primary difference is packaging format (tube versus the original specification) and active product status.

Q: What is the significance of the input-to-output ratio difference in CD74HC7046AM?

A: The CD74HC7046AM has a 1:2 ratio compared to the original 1:4 ratio. This affects the frequency division or multiplication characteristics of the PLL. Selection depends on whether your application requires the specific 1:4 ratio or can function with 1:2 division.

Q: Is 74HC4046AD,653 suitable for all applications using CD74HC4046AMG4?

A: No. The 74HC4046AD,653 has a maximum frequency of 21MHz versus 38MHz for the original part, and a narrower supply voltage range (3V ~ 6V versus 2V ~ 6V). Use this part only if your application operates within these reduced specifications.

Q: Are all substitute parts available in the same 16-SOIC package?

A: Yes. All substitute parts use the 16-SOIC (0.154", 3.90mm Width) package format, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: What compliance certifications apply to these substitute parts?

A: CD74HC4046AM and CD74HC4046AMG4 are ROHS3 compliant. CD74HC7046AM is RoHS non-compliant. 74HC4046AD,653 compliance status is not specified in available documentation. Verify compliance requirements for your specific application and regulatory jurisdiction.