74VHC4046MX Phase Lock Loop IC - Equivalent & Substitute Parts

Part Overview

The 74VHC4046MX is a Phase Lock Loop (PLL) integrated circuit manufactured by onsemi, housed in a 16-SOIC package. This component operates at a maximum frequency of 14MHz with a 1:2 input-to-output ratio and supports a supply voltage range of 2V to 6V. The part is classified as obsolete, making equivalent and substitute components necessary for new designs and ongoing production support.

Substiute Parts

74VHC4046MX

onsemiIn Stock: 758474VHC4046MX Datasheet

Current PartRFQ

74HCT4046AD,118

NXP SemiconductorsIn Stock: 6520874HCT4046AD,118 Datasheet

DirectRFQ

HEF4046BT,653

Nexperia USA Inc.In Stock: 11346HEF4046BT,653 Datasheet

DirectRFQ

74HC4046AD,653

NXP SemiconductorsIn Stock: 7795474HC4046AD,653 Datasheet

UpgradeRFQ

CD74HC4046AM

Texas InstrumentsIn Stock: 1704CD74HC4046AM Datasheet

UpgradeRFQ

CD74HC4046AM96

Texas InstrumentsIn Stock: 19600CD74HC4046AM96 Datasheet

UpgradeRFQ

CD74HC4046AMT

Texas InstrumentsIn Stock: 1301CD74HC4046AMT Datasheet

UpgradeRFQ

CD74HC4046ANSR

Texas InstrumentsIn Stock: 1984CD74HC4046ANSR Datasheet

SimilarRFQ

SN74LV4046AD

Texas InstrumentsIn Stock: 1237SN74LV4046AD Datasheet

SimilarRFQ

SN74LV4046ADR

Texas InstrumentsIn Stock: 3220SN74LV4046ADR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74VHC4046MX is determined by the following critical parameters:

• Package compatibility: 16-SOIC (0.154", 3.90mm Width) form factor
• Supply voltage range: Must support 2V to 6V operation
• Frequency capability: Must support minimum 14MHz operation
• Input/Output characteristics: CMOS or compatible logic levels
• Operating temperature range: Must cover -40°C to 85°C minimum
• Mounting type: Surface mount configuration

Substitute parts are grouped into three categories based on their relationship to the original specification:

Direct Substitutes maintain electrical and mechanical compatibility within the original parameter envelope.

Upgrade Substitutes exceed the original specifications while maintaining package and pin compatibility, offering enhanced performance characteristics such as higher frequency capability or extended temperature ranges.

Similar Parts share the same base product family and core functionality but may have minor package variations or different input/output ratio specifications that require application verification.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement in existing designs:

The 74HC4046AD,653 from NXP Semiconductors provides the closest functional match. It maintains the 16-SOIC (0.154", 3.90mm) package footprint, supports the 2V to 6V supply range of the original part, and exceeds the 14MHz frequency requirement at 21MHz. This part is in active production status with REACH compliance and RoHS3 certification.

For new designs requiring enhanced performance:

The CD74HC4046AM, CD74HC4046AM96, and CD74HC4046AMT from Texas Instruments offer superior specifications with 38MHz maximum frequency and extended temperature range (-55°C to 125°C). All three variants maintain the 16-SOIC (0.154", 3.90mm) package and 2V to 6V supply voltage compatibility. These parts carry RoHS3 compliance and REACH unaffected status. Selection between these three variants depends on packaging requirements: tube (AM), cut tape with Digi-Reel (AM96), or tape and reel (AMT).

For applications with relaxed frequency requirements:

The HEF4046BT,653 from Nexperia operates at 2.7MHz maximum frequency and supports an extended supply voltage range of 3V to 15V. This part maintains the 16-SOIC (0.154", 3.90mm) package and is suitable for low-frequency applications where the original 14MHz specification exceeds system requirements.

Package consideration:

The CD74HC4046ANSR uses a 16-SOIC (0.209", 5.30mm) package variant. This part is electrically equivalent to other CD74HC4046 variants but requires PCB layout modification due to the wider package width. Use only if the original design accommodates this package size.

Frequently Asked Questions (FAQ)

Q: Can the 74HCT4046AD,118 replace the 74VHC4046MX directly?

A: The 74HCT4046AD,118 operates within a narrower supply voltage range (4.5V to 5.5V) compared to the original part (2V to 6V). Direct substitution is only suitable for applications that operate exclusively within the 4.5V to 5.5V window. The part exceeds frequency requirements at 21MHz and maintains the same 16-SOIC package footprint.

Q: What is the difference between CD74HC4046AM, CD74HC4046AM96, and CD74HC4046AMT?

A: These three part numbers are electrically identical Phase Lock Loop ICs from Texas Instruments with 38MHz maximum frequency and 2V to 6V supply voltage support. The differences are packaging formats: AM is supplied in tubes, AM96 in cut tape with Digi-Reel, and AMT in tape and reel. Select based on your procurement and assembly process requirements.

Q: Why does the CD74HC4046ANSR have a different package width?

A: The CD74HC4046ANSR uses a 16-SOIC (0.209", 5.30mm) package, which is wider than the standard 16-SOIC (0.154", 3.90mm) used by the original part and most substitutes. This requires PCB layout verification before use. All other CD74HC4046 variants use the standard 0.154" width package.

Q: Is the HEF4046BT,653 suitable for high-frequency applications?

A: The HEF4046BT,653 operates at a maximum frequency of 2.7MHz, which is below the original 14MHz specification. This part is suitable only for applications with frequency requirements below 2.7MHz. For applications requiring 14MHz or higher operation, use the 74HC4046AD,653 or CD74HC4046 series parts.

Q: What compliance certifications apply to these substitute parts?

A: All active substitute parts listed carry REACH unaffected status and RoHS3 compliance. The original 74VHC4046MX is classified as REACH unaffected with EAR99 export classification. Verify specific compliance requirements for your application and region before final part selection.

Q: Can I use SN74LV4046AD or SN74LV4046ADR in place of the 74VHC4046MX?

A: The SN74LV4046AD and SN74LV4046ADR operate within a narrower supply voltage range (3V to 5.5V) compared to the original part (2V to 6V). These parts are suitable only for applications operating within the 3V to 5.5V range. Both exceed the 14MHz frequency requirement at 38MHz and maintain the 16-SOIC (0.154", 3.90mm) package footprint.