The NXP 74HC4046AD is a high-speed Si-gate CMOS device that is pin compatible with the HEF4046B but has different electrical characteristics. This integrated circuit is a phase-locked loop (PLL) system that consists of a linear Voltage-Controlled Oscillator (VCO) and two different phase comparators with a common signal input amplifier and a common comparator input. The 74HC4046AD is designed for use in both analog and digital phase-locked loops and is particularly effective for low power, high-frequency applications.

Key Features

• Voltage-Controlled Oscillator: The VCO provides a center frequency range from 1.6 MHz to 18 MHz (typical at VDD = 5 V, TA = 25 °C) and can be modulated from a low voltage input signal.
• Phase Comparators: Two phase comparators are included, each with a unique characteristic. Comparator I is designed for applications where phase comparison occurs at low frequencies. Comparator II provides a more complex comparison function which is generally used for higher frequencies.
• Minimal External Components: The 74HC4046AD requires only an external resistor and capacitor to set the free-running frequency of the VCO and the loop filter.
• Wide Operating Voltage: It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually ground).
• Low Power Consumption: The device provides low power dissipation, making it suitable for battery-operated and low-power systems.
• High Noise Immunity: The 74HC4046AD exhibits high noise immunity, characteristic of CMOS devices.

Applications

The 74HC4046AD is suitable for a wide range of applications, including:

• FM and PM demodulators
• Data synchronization and conditioning
• Signal conditioning
• Frequency synthesis and multiplication
• Carrier recovery

Package Details

The 74HC4046AD is available in a 16-pin SO package, providing a compact footprint for space-constrained applications. The device's operating temperature range is from -40 °C to +125 °C, ensuring reliable performance across a wide range of environmental conditions.

Quality and Reliability

As with all NXP products, the 74HC4046AD is manufactured to high-quality standards, with rigorous testing to ensure reliable operation in various applications and environments.