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Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

The MC74HC4046AFELG device is a low-power, high-speed CMOS peripheral, designed to be used as a Clock Generator, Phase Lock Loop, or Frequency Synthesizer. The device features two differential inputs, a reference oscillator input (VRI) and a receiver input (VRIR), as well as an oscillator output that serves as the clock generator for the device. The device also includes a divider, a phase detector, and a one-bit data latch. The device is built using high-performance CMOS technology, ensuring low power and high-speed operation.

The MC74HC4046AFELG features an on-chip Voltage Controlled Oscillator (VCO) and an on-chip Clock Generator (CG). The VCO is composed of two NAND gates, one of which is driven by a voltage-controlled input, while the other is driven by a reference oscillator. The CG is composed of a divider, a phase detector, and a one-bit data latch. The divider divides the frequency of the input clock signal and generates a divide-by-N counter output that is compared to the reference frequency. The phase detector is then used to compare the two frequencies, and if they are not in phase, it applies a correction signal to the VCO, which adjusts the output frequency. The one-bit latch is used to store the state of the output signal, allowing the device to maintain a constant frequency over temperature and supply variations.

The MC74HC4046AFELG can be configured in a variety of applications. For example, it can be used to generate a system clock for digital circuits or other devices, or it can be used as a frequency synthesizer for radio communications or other devices requiring a precise output frequency. Additionally, the device can be used to generate a stable clock in systems with variable clock frequencies, or to control the output frequency of a PLL circuit. The device is also suitable for use in audio systems, where a low-complexity, low-power clock generator is required.

The MC74HC4046AFELG is designed to operate over a wide range of supply voltages and temperatures. The device has a low-power dissipation and is self-contained, requiring no external components. The device is available in a variety of packages, making it suitable for a wide range of applications. Additionally, the device is well suited for use in automotive, aerospace, and industrial applications.

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