MC14046BFELG

Clock Generators, PLLs, Frequency Synthesizers Overview

The MC14046BFELG is a 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 supports a supply voltage range of 3.0 V to 18.0 V and operates across an extended temperature range of -55°C to +125°C. It features buffered outputs compatible with Low-Power TTL logic levels and includes diode protection on all inputs. The component is designed for applications requiring frequency synthesis, modulation, and synchronization.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates two distinct phase comparators: Comparator 1 (Exclusive OR gate) and Comparator 2 (leading edge sensing logic).
• Includes a linear Voltage-Controlled Oscillator (VCO) and a source follower output for signal buffering.
• Features internal zener diode for power supply regulation assistance and input diode protection.
• AEC-Q100 qualified and PPAP capable, suitable for automotive and high-reliability applications.

Clock Generators, PLLs, Frequency Synthesizers Applications

• FM and FSK modulation and demodulation circuits.
• Frequency synthesis and multiplication systems.
• Data synchronization and conditioning modules.
• Voltage-to-frequency conversion and motor speed control.

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'FELG' against the official onsemi ordering information table, as standard listings typically cite 'BDWG' or 'BDWR2G'. Confirm that the NLV prefix requirements are met if automotive qualification is necessary. Ensure the SOIC-16 WB package dimensions match the design constraints. Check for RoHS compliance status corresponding to the specific manufacturing lot.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a dual-phase comparator PLL is required for low-power CMOS applications. Compare Phase Comparator 1's duty cycle limitation against Phase Comparator 2's rising-edge sensitivity based on the input signal characteristics. Ensure the external VCO components (R1, R2, C1) can achieve the desired frequency range within the 3V to 18V supply limits. Verify noise immunity requirements against the specified minimum input sensitivity.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The MC14046B belongs to the 4000-series CMOS logic family. It serves as a pin-for-pin replacement for the CD4046B. The device is part of onsemi's broader portfolio of analog and mixed-signal ICs designed for robust performance in industrial and consumer electronics. The 'NLV' prefix indicates specific site and control change requirements for automotive use.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The datasheet explicitly identifies the CD4046B as a pin-for-pin replacement. Other generic CMOS PLLs may require significant circuit redesign due to differences in phase comparator architecture or VCO linearity specifications.