MC14046BF

Clock Generators, PLLs, Frequency Synthesizers Overview

The MC14046BF is a CMOS phase-locked loop (PLL) integrated circuit manufactured by onsemi. It integrates two phase comparators, a voltage-controlled oscillator (VCO), a source follower, and a zener diode within a single package. The device operates over a supply voltage range of 3.0 V to 18.0 V and supports an operating temperature range from -55°C to +125°C. Key electrical characteristics include buffered outputs compatible with Low-Power TTL logic levels and input protection diodes on all pins. The component serves as a pin-for-pin replacement for the CD4046B.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates Phase Comparator 1 (Exclusive OR gate) and Phase Comparator 2 (leading edge sensing logic).
• Includes a linear Voltage-Controlled Oscillator (VCO) and a high-impedance Source Follower output.
• Features internal Zener diode for power supply regulation assistance.
• Provides diode protection on all inputs and buffered outputs compatible with Low-Power TTL.

Clock Generators, PLLs, Frequency Synthesizers Applications

• FM and FSK modulation and demodulation circuits.
• Frequency synthesis and multiplication systems.
• Tone decoding and data synchronization conditioning.
• Voltage-to-frequency conversion applications.
• Motor speed control loops.

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify that the specific ordering suffix matches the required package type and tape/reel specifications. Confirm compliance with AEC-Q100 qualification if automotive application requirements are necessary. Ensure the procurement documentation aligns with the manufacturer's current RoHS compliance status and Pb-Free indicators.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a complete PLL solution is required without external phase detector integration. Consider the duty cycle limitations of Phase Comparator 1 versus the rising-edge sensitivity of Phase Comparator 2 based on input signal characteristics. Verify that the external passive components for the VCO frequency setting fall within the recommended resistance and capacitance ranges for the target frequency stability.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the MC14046B series of phase-locked loops produced by onsemi. It is functionally equivalent to the legacy Motorola MC14046B and CD4046B devices. The 'F' suffix typically denotes a specific package variant or manufacturing code within the broader MC14046B family distribution channels.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The datasheet explicitly identifies the MC14046B as a pin-for-pin replacement for the CD4046B. Designers should verify that the substitute device meets the same electrical parameters regarding supply voltage range and output drive capabilities.