Technical Summary: HCC/HCF4046B Phase-Locked Loop (PLL)

Overview

The HCC4046B and HCF4046B are monolithic integrated circuits belonging to the "B" series of CMOS devices, designed for phase-locked loop (PLL) applications. These devices are manufactured to operate across extended (HCC) and intermediate (HCF) temperature ranges, making them suitable for a variety of industrial and commercial applications. The 4046B is housed in a 16-lead package and provides robust performance in frequency demodulation, frequency synthesis, and clock synchronization systems.

The 4046B integrates a voltage-controlled oscillator (VCO), three phase comparators (PC1, PC2, and PC3), a source follower, and a zener diode for voltage regulation. Its low power consumption, wide operating voltage range, and high noise immunity make it a versatile choice for precision timing and communication systems.

Features

• Wide Supply Voltage Range: Operates from 3V to 18V, accommodating various logic levels.
• Low Power Consumption: CMOS technology ensures minimal power dissipation, even at higher frequencies.
• Three Phase Comparators: Includes an XOR gate (PC1), edge-triggered JK flip-flop (PC2), and edge-triggered RS flip-flop (PC3) for flexible phase detection.
• Voltage-Controlled Oscillator (VCO): Wide frequency range with linear control characteristics.
• High Noise Immunity: Stable performance in electrically noisy environments.
• On-Chip Zener Diode: Provides a stable reference voltage for improved regulation.
• Source Follower Output: Buffers the VCO input for external use.
• Temperature Ranges: HCC4046B (-40°C to +125°C), HCF4046B (-40°C to +85°C).

Applications

The HCC/HCF4046B is widely used in applications requiring precise frequency and phase control. Key applications include:

• Frequency Modulation/Demodulation: Used in FM transmitters and receivers for signal recovery.
• Clock Synchronization: Aligns clock signals in digital systems to reduce timing skew.
• Tone Decoding: Detects specific frequency tones in telecommunication systems.
• Frequency Synthesis: Generates stable output frequencies from a reference signal.
• Data Encoding/Decoding: Facilitates serial data transmission in communication protocols.
• Motor Speed Control: Provides feedback for precise RPM regulation in industrial systems.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (V_DD): -0.5V to +20V
• Input Voltage (V_IN): -0.5V to V_DD + 0.5V
• Operating Temperature Range:
  • HCC4046B: -40°C to +125°C
  • HCF4046B: -40°C to +85°C
• Storage Temperature Range: -65°C to +150°C

Key Performance Parameters

• VCO Frequency Range: Up to 1.2MHz (at V_DD = 10V)
• Input Capacitance: 7.5pF (typical)
• Power Dissipation: 500nW (static, typical)
• Phase Comparator Linearity: ±0.1% (PC1, typical)
• Zener Voltage: 5V to 8V (typical)

Package Information

The HCC/HCF4046B is available in a standard 16-lead package with the following configurations:

• DIP-16 (Dual In-Line Package):
  • Dimensions: 19.3mm x 6.35mm
  • Pin Pitch: 2.54mm
• SO-16 (Small Outline Package):
  • Dimensions: 10.0mm x 5.3mm
  • Pin Pitch: 1.27mm

Pinout Description

• Pin 1 (Phase Comparator 1 Output): XOR-based phase detector output.
• Pin 2 (Phase Comparator 2 Output): Edge-triggered PC output.
• Pin 3 (Signal Input): External signal input for phase comparison.
• Pin 4 (VCO Output): Buffered oscillator output.
• Pin 5 (Inhibit): Active-high control to disable VCO.
• Pin 6, 7 (VCO Timing Capacitor): External capacitor sets frequency range.
• Pin 8 (GND): Ground reference.
• Pin 9 (VCO Input): Control voltage input for frequency adjustment.
• Pin 10 (Source Follower Output): Buffered VCO input voltage.
• Pin 11 (R1): External resistor for VCO frequency adjustment.
• Pin 12 (R2): Optional resistor for offset frequency control.
• Pin 13 (Phase Comparator 3 Output): RS flip-flop-based PC output.
• Pin 14 (Zener Diode Cathode): Regulated voltage output.
• Pin 15 (Internal Zener Anode): Connect to GND for regulation.
• Pin 16 (V_DD): Positive supply voltage.