ON Semiconductor MC74HC4046ADTR2G

The MC74HC4046ADTR2G is a high-performance silicon-gate CMOS device from ON Semiconductor that combines low power consumption with high noise immunity characteristic of CMOS integrated circuits. This versatile component is a Phase-Locked Loop (PLL) circuit that comprises a linear Voltage-Controlled Oscillator (VCO) and two different phase comparators with a common signal input amplifier and a common comparator input. A third comparator is provided by the inclusion of a 4046A device, which has an additional exclusive OR phase comparator.

The VCO of the MC74HC4046ADTR2G can be programmed with a set of external components to lock onto an input frequency and maintain that frequency at the VCO output. The phase comparators compare the input signal to the VCO output and provide an error voltage output that is proportional to the phase difference between the two signals. This error voltage is used to tune the VCO, enabling the PLL to maintain a lock on the input frequency even in the presence of some degree of frequency variation.

This device is provided in a TSSOP-16 package, which offers a compact footprint for space-constrained applications. It is designed for use in a variety of applications, including FM modulation and demodulation, frequency synthesis and conversion, and data synchronization. The MC74HC4046ADTR2G is widely used in communication systems, digital telephony, and function generators, where precise frequency control is essential.

Key features of the MC74HC4046ADTR2G include:

• Low power operation
• High noise immunity characteristic of CMOS technology
• Wide supply voltage range from 2V to 6V
• Low input current of 1µA at 18V
• Maximum frequency of 18MHz at 6V
• Programmable VCO
• Three phase comparators with a common signal input
• Available in TSSOP-16 package

The MC74HC4046ADTR2G is a reliable and flexible solution for designers looking to implement a PLL in their system. Its combination of features makes it a popular choice for maintaining frequency integrity in a wide range of electronic applications.