CD4046BCN Phase Lock Loop IC Equivalent & Substitute Parts

Part Overview

The CD4046BCN is a Phase Lock Loop (PLL) integrated circuit manufactured by onsemi, designed for clock and timing applications. This 16-DIP package device operates at a maximum frequency of 1.6MHz with a supply voltage range of 3V to 15V and an operating temperature range of -55°C to 125°C. The CD4046BCN is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatible package form factors, electrical characteristics, and functional performance within the specified parameter ranges.

Key Parameters

Parameter	CD4046BCN
Manufacturer	onsemi
Type	Phase Lock Loop (PLL)
Package / Case	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Input	CMOS
Output	CMOS
Number of Circuits	1
Frequency - Max	1.6MHz
Ratio - Input:Output	1:2
Voltage - Supply	3V ~ 15V
Operating Temperature	-55°C ~ 125°C
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the CD4046BCN are evaluated based on the following critical parameters that determine functional compatibility:

Package Compatibility: All substitute parts must use the 16-DIP (0.300", 7.62mm) through-hole package to ensure mechanical and electrical compatibility with existing PCB layouts.

Electrical Interface: Input and output signal types (CMOS, TTL) must be compatible with the original design. The CD4046BCN accepts CMOS input and provides CMOS output.

Supply Voltage Range: Substitute parts must operate within or encompass the original 3V to 15V supply voltage specification. Parts with narrower voltage ranges may be suitable if the application operates within their specified limits.

Operating Temperature Range: The -55°C to 125°C operating temperature range of the CD4046BCN establishes the baseline. Substitute parts meeting or exceeding this range maintain full compatibility.

Frequency Performance: Maximum frequency capability determines the operational ceiling. The CD4046BCN operates at 1.6MHz; substitute parts with higher frequency ratings provide enhanced performance headroom.

Functional Type: All substitute parts must be Phase Lock Loop (PLL) integrated circuits with single-circuit configurations.

Parameter Comparison

Parameter	CD4046BCN	SN74LV4046AN	CD74HC4046AE	CD74HCT4046AE	CD4046BE	CD4046BEE4
Manufacturer	onsemi	Texas Instruments	Harris Corporation	Texas Instruments	Texas Instruments	Texas Instruments
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
Input	CMOS	CMOS, TTL	CMOS	CMOS	CMOS	CMOS
Output	CMOS	CMOS, TTL	CMOS	CMOS	CMOS	CMOS
Frequency - Max	1.6MHz	38MHz	38MHz	38MHz	2.4MHz	2.4MHz
Ratio - Input:Output	1:2	1:3	1:4	1:4	1:1	1:1
Voltage - Supply	3V ~ 15V	3V ~ 5.5V	2V ~ 6V	4.5V ~ 5.5V	3V ~ 18V	3V ~ 18V
Operating Temperature	-55°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Product Status	Obsolete	Active	Obsolete	Active	Active	Discontinued at DiGi Electronics
RoHS Status	Not specified	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: SN74LV4046AN (Texas Instruments)

The SN74LV4046AN is the recommended direct substitute for the CD4046BCN. This part maintains the 16-DIP package form factor and CMOS input/output compatibility. The SN74LV4046AN operates within the 3V to 5.5V supply voltage range, which overlaps with the lower portion of the CD4046BCN specification. The device is currently in active production status, ensuring long-term availability. The maximum frequency of 38MHz exceeds the CD4046BCN requirement, providing performance headroom. The operating temperature range of -40°C to 125°C covers the upper portion of the original specification. ROHS3 compliance and REACH unaffected status support modern manufacturing and environmental requirements.

Alternative Substitute: CD74HCT4046AE (Texas Instruments)

The CD74HCT4046AE provides an alternative with active product status and ROHS3 compliance. This part maintains the 16-DIP package and CMOS interface. The supply voltage range of 4.5V to 5.5V is narrower than the original but suitable for standard logic supply applications. The operating temperature range of -55°C to 125°C matches the CD4046BCN specification. Maximum frequency of 38MHz provides enhanced performance capability.

Compatible Substitute: CD4046BE (Texas Instruments)

The CD4046BE shares the same base product number as the CD4046BCN and maintains full compatibility with the 16-DIP package and CMOS interface. This part operates across a supply voltage range of 3V to 18V, which encompasses the original specification. The maximum frequency of 2.4MHz exceeds the CD4046BCN requirement. Active product status ensures availability. ROHS3 compliance and REACH unaffected status meet current regulatory requirements. The CD4046BE includes divider functionality, providing additional operational capability.

Compatibility Note: CD74HC4046AE (Harris Corporation)

The CD74HC4046AE maintains package and interface compatibility but is classified as obsolete. The supply voltage range of 2V to 6V encompasses the lower portion of the CD4046BCN specification. RoHS non-compliance may restrict use in applications requiring environmental compliance certification.

Limited Availability: CD4046BEE4 (Texas Instruments)

The CD4046BEE4 is functionally equivalent to the CD4046BE but is discontinued at DiGi Electronics, limiting procurement options for new production requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74LV4046AN replace the CD4046BCN in all applications?

A: The SN74LV4046AN is mechanically and electrically compatible with the CD4046BCN in applications operating within the 3V to 5.5V supply voltage range. Applications requiring the full 3V to 15V range of the original part should evaluate the CD4046BE or CD74HC4046AE alternatives.

Q: What is the primary difference between the CD4046BCN and CD4046BE?

A: Both parts share the same base product number and 16-DIP package. The CD4046BE operates at a maximum frequency of 2.4MHz compared to the CD4046BCN at 1.6MHz. The CD4046BE includes divider functionality and supports a wider supply voltage range of 3V to 18V. The CD4046BE is currently in active production, whereas the CD4046BCN is obsolete.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts listed are available in the 16-DIP (0.300", 7.62mm) through-hole package, ensuring direct mechanical compatibility with existing PCB designs.

Q: Which substitute part offers the best long-term availability?

A: The SN74LV4046AN and CD74HCT4046AE are both classified as active products with current manufacturing status. The CD4046BE is also active. These three parts offer the best long-term procurement reliability.

Q: Do substitute parts meet modern environmental compliance standards?

A: The SN74LV4046AN, CD74HCT4046AE, CD4046BE, and CD4046BEE4 are all ROHS3 compliant and REACH unaffected. The CD74HC4046AE is RoHS non-compliant and may not meet current environmental requirements.

Q: What is the significance of the Input:Output ratio differences?

A: The Input:Output ratio indicates the frequency division or multiplication relationship. The CD4046BCN operates at 1:2, while substitute parts vary (SN74LV4046AN at 1:3, CD74HC4046AE and CD74HCT4046AE at 1:4, CD4046BE and CD4046BEE4 at 1:1). Selection depends on the specific frequency relationship required by the application circuit.

Q: Can the CD74HC4046AE be used despite its obsolete status?

A: The CD74HC4046AE is mechanically and electrically compatible with the CD4046BCN. However, its obsolete status and RoHS non-compliance may present procurement and regulatory challenges for new production designs. Active alternatives such as the SN74LV4046AN or CD74HCT4046AE are preferred.

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