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74VHC4046M Equivalent & Substitute Parts
Part Overview
The 74VHC4046M is a Phase Lock Loop (PLL) IC manufactured by onsemi, designed for clock and timing applications. This 16-SOIC surface mount device operates at a maximum frequency of 14MHz with a supply voltage range of 2V to 6V and an operating temperature range of -40°C to 85°C. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring PLL functionality in this performance class.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Part Number | 74VHC4046M |
| Manufacturer | onsemi |
| Type | Phase Lock Loop (PLL) |
| Package | 16-SOIC (0.154", 3.90mm Width) |
| Frequency - Max | 14MHz |
| Voltage - Supply | 2V ~ 6V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| Ratio - Input:Output | 1:2 |
| Number of Circuits | 1 |
Substitute Part Grouping Explanation
Substitution for the 74VHC4046M is determined by the following critical parameters: package type (16-SOIC with 0.154" width), surface mount mounting type, supply voltage compatibility (2V to 6V range or overlapping range), operating temperature range (-40°C minimum and 85°C minimum), and PLL functionality with single circuit configuration. Parts are grouped into three categories based on their relationship to the original specification:
Direct Substitutes maintain full electrical and mechanical compatibility with the 74VHC4046M within the specified parameter ranges.
Upgrade Substitutes offer enhanced performance characteristics (higher maximum frequency, extended temperature range, or improved voltage supply range) while maintaining package compatibility and core PLL functionality.
Similar Alternatives provide PLL functionality in compatible packages but may have variations in package dimensions, voltage supply ranges, or frequency specifications that require design verification.
Parameter Comparison
| Part Number | Manufacturer | Package | Frequency - Max | Voltage - Supply | Operating Temperature | Product Status | Ratio - Input:Output |
|---|---|---|---|---|---|---|---|
| 74VHC4046M | onsemi | 16-SOIC (0.154", 3.90mm) | 14MHz | 2V ~ 6V | -40°C ~ 85°C | Obsolete | 1:2 |
| Direct Substitutes | |||||||
| 74HCT4046AD | NXP Semiconductors | 16-SOIC (0.154", 3.90mm) | 21MHz | 4.5V ~ 5.5V | -40°C ~ 125°C | Active | 1:1 |
| HEF4046BT,653 | Nexperia USA Inc. | 16-SOIC (0.154", 3.90mm) | 2.7MHz | 3V ~ 15V | -40°C ~ 85°C | Active | 1:4 |
| Upgrade Substitutes | |||||||
| 74HC4046AD | NXP Semiconductors | 16-SOIC (0.154", 3.90mm) | 21MHz | 3V ~ 6V | -40°C ~ 125°C | Active | 1:1 |
| CD74HC4046AM | Texas Instruments | 16-SOIC (0.154", 3.90mm) | 38MHz | 2V ~ 6V | -55°C ~ 125°C | Active | 1:4 |
| CD74HC4046AM96 | Texas Instruments | 16-SOIC (0.154", 3.90mm) | 38MHz | 2V ~ 6V | -55°C ~ 125°C | Active | 1:4 |
| CD74HC4046AMT | Texas Instruments | 16-SOIC (0.154", 3.90mm) | 38MHz | 2V ~ 6V | -55°C ~ 125°C | Active | 1:4 |
| Similar Alternatives | |||||||
| CD74HC4046ANSR | Texas Instruments | 16-SOIC (0.209", 5.30mm) | 38MHz | 2V ~ 6V | -55°C ~ 125°C | Active | 1:4 |
| SN74LV4046AD | Texas Instruments | 16-SOIC (0.154", 3.90mm) | 38MHz | 3V ~ 5.5V | -40°C ~ 125°C | Active | 1:3 |
| SN74LV4046ADR | Texas Instruments | 16-SOIC (0.154", 3.90mm) | 38MHz | 3V ~ 5.5V | -40°C ~ 125°C | Active | 1:3 |
Engineering Selection Recommendations
For Direct Replacement: The 74HCT4046AD from NXP Semiconductors and HEF4046BT,653 from Nexperia USA Inc. are active products with identical 16-SOIC packaging. The 74HCT4046AD operates within a narrower voltage range (4.5V to 5.5V) but offers higher maximum frequency (21MHz) and extended temperature range (-40°C to 125°C). The HEF4046BT,653 supports the full 2V to 6V supply range of the original part and maintains the same -40°C to 85°C temperature range, making it suitable for applications with identical voltage and temperature requirements.
For Enhanced Performance: The CD74HC4046AM, CD74HC4046AM96, and CD74HC4046AMT from Texas Instruments provide significant performance upgrades with 38MHz maximum frequency and extended operating temperature range (-55°C to 125°C). These parts maintain the 2V to 6V supply voltage range of the original 74VHC4046M and are available in multiple packaging options (Tube, Cut Tape & Digi-Reel, and Tape & Reel). All Texas Instruments 74HC4046 variants are RoHS3 compliant.
For Alternative Configurations: The 74HC4046AD from NXP Semiconductors offers a middle-ground option with 21MHz frequency and 3V to 6V supply range. The SN74LV4046AD and SN74LV4046ADR from Texas Instruments provide 38MHz operation but require a narrower supply voltage range (3V to 5.5V) and are suitable for 3.3V and 5V logic systems. The CD74HC4046ANSR has a wider package body (0.209" versus 0.154") and requires PCB layout verification before implementation.
All substitute parts listed are active products with REACH compliance and EAR99 export classification, ensuring long-term availability and regulatory compliance.
Frequently Asked Questions (FAQ)
Q: Can I use 74HCT4046AD as a direct replacement for 74VHC4046M?
A: The 74HCT4046AD is mechanically compatible (identical 16-SOIC 0.154" package) and functionally equivalent as a PLL IC. However, its supply voltage range (4.5V to 5.5V) is narrower than the original part (2V to 6V). Use this substitute only if your application operates within the 4.5V to 5.5V range.
Q: What is the difference between CD74HC4046AM, CD74HC4046AM96, and CD74HC4046AMT?
A: These three parts are electrically identical with 38MHz maximum frequency and 2V to 6V supply range. The differences are in packaging format: CD74HC4046AM is supplied in Tube, CD74HC4046AM96 in Cut Tape & Digi-Reel, and CD74HC4046AMT in Tape & Reel. Select based on your procurement and assembly requirements.
Q: Why is CD74HC4046ANSR listed as a similar alternative rather than a direct substitute?
A: The CD74HC4046ANSR has a wider package body (0.209" width versus 0.154" width) compared to the original 74VHC4046M. While electrically compatible, the different package dimensions require PCB layout verification to ensure proper fit in existing designs.
Q: Can I use SN74LV4046AD in a 2V supply application?
A: No. The SN74LV4046AD operates within a 3V to 5.5V supply range and is not suitable for 2V applications. Use CD74HC4046AM or HEF4046BT,653 for low-voltage (2V) operation.
Q: Are all substitute parts RoHS compliant?
A: The Texas Instruments 74HC4046 variants (CD74HC4046AM, CD74HC4046AM96, CD74HC4046AMT) and SN74LV4046 series are RoHS3 compliant. The NXP 74HC4046AD and 74HCT4046AD do not list RoHS status in the provided specifications. The HEF4046BT,653 is RoHS3 compliant. Verify RoHS compliance requirements with your procurement specifications.
Q: What is the input-to-output ratio, and does it affect substitution?
A: The input-to-output ratio varies among substitutes (1:2 for original, 1:4 for most Texas Instruments variants, 1:3 for SN74LV series). This ratio defines the frequency division or multiplication characteristics. Select a substitute with a ratio compatible with your circuit design requirements.
Q: Which substitute offers the widest operating temperature range?
A: The CD74HC4046AM, CD74HC4046AM96, and CD74HC4046AMT from Texas Instruments offer the widest temperature range (-55°C to 125°C), compared to the original part's -40°C to 85°C range.
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