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CD4046BCM Phase Lock Loop IC - Equivalent & Substitute Parts
Part Overview
The CD4046BCM is a Phase Lock Loop (PLL) integrated circuit manufactured by onsemi, designed for clock and timing applications. This 16-SOIC surface mount device operates across a wide supply voltage range of 3V to 15V and supports frequencies up to 1.6MHz with CMOS input and output compatibility. The CD4046BCM is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain functional compatibility while offering improved specifications, active product status, and enhanced compliance certifications.
Substiute Parts
Key Parameters
| Parameter | CD4046BCM |
|---|---|
| Manufacturer | onsemi |
| Type | Phase Lock Loop (PLL) |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Input / Output | CMOS / CMOS |
| Frequency - Max | 1.6MHz |
| Voltage - Supply | 3V ~ 15V |
| Operating Temperature | -55°C ~ 125°C |
| Number of Circuits | 1 |
| Ratio - Input:Output | 1:2 |
| Product Status | Obsolete |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the CD4046BCM are selected based on strict compatibility criteria derived from the provided electrical and mechanical parameters. The primary substitution logic is based on the following key parameters:
Package Compatibility: All substitute parts maintain the 16-SOIC (0.154", 3.90mm Width) surface mount package, ensuring direct pin-compatible replacement without PCB redesign.
Functional Type: All substitutes are Phase Lock Loop (PLL) integrated circuits with single circuit configuration, maintaining the core functional requirement.
Input/Output Compatibility: Substitute parts support CMOS input and output, with some variants offering extended compatibility (TTL support in Texas Instruments 74LV series).
Supply Voltage Range: Substitutes operate within ranges that encompass or exceed the CD4046BCM's 3V to 15V specification. The 74HC series supports 3V to 6V, the 74HCT series supports 4.5V to 5.5V, and the 74LV series supports 3V to 5.5V, all suitable for standard logic applications.
Operating Temperature: All substitutes maintain the -40°C to -55°C minimum and 125°C maximum operating range, meeting or exceeding the CD4046BCM specification.
Frequency Performance: Substitute parts offer significantly higher maximum frequency ratings (21MHz to 38MHz), providing enhanced performance headroom for timing applications.
Product Status: Active product status ensures long-term availability and ongoing manufacturer support, addressing the obsolescence of the CD4046BCM.
Parameter Comparison
| Parameter | CD4046BCM | 74HC4046AD,653 | 74HCT4046AD,118 | SN74LV4046AD | SN74LV4046ADR | CD74HC4046AM | CD74HC4046AM96 | CD74HC4046AMT | CD74HCT4046AM96 | CD74HCT4046AMT |
|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | onsemi | NXP Semiconductors | NXP Semiconductors | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Type | Phase Lock Loop (PLL) | Phase Lock Loop (PLL) | Phase Lock Loop (PLL) | Phase Lock Loop (PLL) | Phase Lock Loop (PLL) | Phase Lock Loop (PLL) | Phase Lock Loop (PLL) | Phase Lock Loop (PLL) | Phase Lock Loop (PLL) | Phase Lock Loop (PLL) |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Input / Output | CMOS / CMOS | Clock / Clock | Clock / Clock | CMOS, TTL / CMOS, TTL | CMOS, TTL / CMOS, TTL | CMOS / CMOS | CMOS / CMOS | CMOS / CMOS | CMOS / CMOS | CMOS / CMOS |
| Frequency - Max | 1.6MHz | 21MHz | 21MHz | 38MHz | 38MHz | 38MHz | 38MHz | 38MHz | 38MHz | 38MHz |
| Voltage - Supply | 3V ~ 15V | 3V ~ 6V | 4.5V ~ 5.5V | 3V ~ 5.5V | 3V ~ 5.5V | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -55°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C |
| Number of Circuits | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Ratio - Input:Output | 1:2 | 1:2 | 1:2 | 1:3 | 1:3 | 1:4 | 1:4 | 1:4 | 1:4 | 1:4 |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | Not specified | Not specified | Not specified | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
For Standard Logic Applications (3V to 6V Supply): The CD74HC4046AM, CD74HC4046AM96, and CD74HC4046AMT variants from Texas Instruments are recommended. These parts offer active product status, ROHS3 compliance, extended frequency capability (38MHz), and support the widest supply voltage range (2V to 6V) among available substitutes. The CD74HC4046AM96 variant provides the highest inventory availability (19,557 units) with Cut Tape and Digi-Reel packaging options.
For 5V Logic Systems: The CD74HCT4046AM96 and CD74HCT4046AMT from Texas Instruments are optimized for 5V systems with supply voltage range of 4.5V to 5.5V. Both variants maintain active product status and ROHS3 compliance. The CD74HCT4046AM96 offers superior inventory availability (17,642 units) in Tape & Reel packaging.
For Low-Voltage Applications (3V to 5.5V): The SN74LV4046AD and SN74LV4046ADR from Texas Instruments support the broadest supply voltage range (3V to 5.5V) and offer TTL input/output compatibility in addition to CMOS. Both variants are ROHS3 compliant and active products. The SN74LV4046ADR in Tape & Reel packaging provides 3,209 units of inventory.
For NXP-Based Designs: The 74HC4046AD,653 and 74HCT4046AD,118 from NXP Semiconductors provide alternative sourcing. The 74HC4046AD,653 supports 3V to 6V operation with 77,888 units available, while the 74HCT4046AD,118 is optimized for 5V systems with 65,163 units in stock.
Avoid: CD74HCT4046AM (Harris Corporation) is classified as obsolete and should not be selected for new designs despite active inventory.
Frequently Asked Questions (FAQ)
Q: Can the CD4046BCM be directly replaced with any of these substitute parts? A: Yes, all listed substitute parts are pin-compatible replacements in the 16-SOIC package. However, supply voltage requirements must be verified for your specific application. The CD4046BCM supports 3V to 15V, while most substitutes operate within narrower ranges (2V to 6V for 74HC series, 4.5V to 5.5V for 74HCT series, and 3V to 5.5V for 74LV series).
Q: What is the primary difference between 74HC, 74HCT, and 74LV variants? A: The 74HC series operates from 2V to 6V with CMOS-level inputs and outputs. The 74HCT series is optimized for 5V systems (4.5V to 5.5V) with TTL-compatible inputs. The 74LV series supports 3V to 5.5V operation with both CMOS and TTL input/output compatibility, offering the broadest logic family support.
Q: Does the higher frequency rating of substitute parts affect compatibility? A: No. The substitute parts' higher maximum frequency ratings (21MHz to 38MHz) compared to the CD4046BCM (1.6MHz) provide performance headroom and do not affect pin compatibility or functional operation at lower frequencies. Applications operating below 1.6MHz will function identically with substitute parts.
Q: Are all substitute parts RoHS compliant? A: The Texas Instruments variants (SN74LV4046AD, SN74LV4046ADR, CD74HC4046AM, CD74HC4046AM96, CD74HC4046AMT, CD74HCT4046AM96, CD74HCT4046AMT) are ROHS3 compliant. The NXP Semiconductors variants (74HC4046AD,653 and 74HCT4046AD,118) do not specify RoHS status in the provided data.
Q: What packaging options are available for substitute parts? A: Packaging varies by part number. Options include Bulk, Tube, Tape & Reel (TR), and Cut Tape (CT) with Digi-Reel. Select packaging based on production volume and handling requirements. High-volume production typically uses Tape & Reel or Cut Tape variants.
Q: Which substitute part offers the best inventory availability? A: The CD74HC4046AM96 from Texas Instruments offers the highest inventory (19,557 units) in Cut Tape and Digi-Reel packaging, followed by the 74HC4046AD,653 from NXP (77,888 units) in Bulk packaging.
Q: Can I use a substitute part rated for lower maximum frequency in a high-frequency application? A: No. The 74HC4046AD,653 and 74HCT4046AD,118 are rated for 21MHz maximum frequency. If your application requires operation above 21MHz, use the 38MHz-rated variants (SN74LV4046AD, SN74LV4046ADR, or CD74HC4046AM series).
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