Name: Phase Locked Loop
Brand: Phase Locked Loop
SKU: MC14046B

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Phase Locked Loop

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Overview

The MC14046B phase locked loop contains two phase comparators, a voltage-controlled oscillator (VCO), source follower, and zener diode. The comparators have two common signal inputs, PCA_in and PCB_in. Input PCA_in can be used directly coupled to large voltage signals, or indirectly coupled (with a series capacitor) to small voltage signals. The self-bias circuit adjusts small voltage signals in the linear region of the amplifier. Phase comparator 1 (an exclusive OR gate) provides a digital error signal PC1_out, and maintains 90 phase shift at the center frequency between PCA_in and PCB_in signals (both at 50% duty cycle). Phase comparator 2 (with leading edge sensing logic) provides digital error signals, PC2_out and LD, and maintains a 0 phase shift between PCA_in and PCB_in signals (duty cycle is immaterial). The linear VCO produces an output signal VCO_out whose frequency is determined by the voltage of input VCO_in and the capacitor and resistors connected to pins C1_A, C1_B, R1, and R2. The source-follower output SF_out with an external resistor is used where the VCO_in signal is needed but no loading can be tolerated. The inhibit input Inh, when high, disables the VCO and source follower to minimize standby power consumption. The zener diode can be used to assist in power supply regulation.

Applications include FM and FSK modulation and demodulation, frequency synthesis and multiplication, frequency discrimination, tone decoding, data synchronization and conditioning, voltage-to-frequency conversion and motor speed control.

Features

Buffered Outputs Compatible with HTL and Low-Power TTL
Diode Protection on All Inputs
Supply Voltage Range = 3.0 to 18 V
Pin-for-Pin Replacement for CD4046B
Phase Comparator 1 is an Exclusive Or Gate and is Duty Cycle Limited
Phase Comparator 2 switches on Rising Edges and is not Duty Cycle
Pb-Free Packages are Available*

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Reference Price

MC14046BDWG

Active

SOIC-16W

751G-03

260

TUBE

CMOS

1.9

$0.524

MC14046BDWR2G

Active

SOIC-16W

751G-03

260

REEL

1000

CMOS

1.9

$0.5051

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Voltage Controlled Oscillators (VCOs) | MC14046B

Phase Locked Loop

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