CD74HC4046AMT Integrated Circuits (ICs)

Series:	74HC
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Phase Lock Loop (PLL)
PLL:	Yes
Input:	CMOS
Output:	CMOS
Number of Circuits:	1
Ratio - Input:Output:	1:4
Differential - Input:Output:	No/No
Frequency - Max:	38MHz
Divider/Multiplier:	No/No
Voltage - Supply:	2 V ~ 6 V
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	16-SOIC
Base Part Number:	74HC4046

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IntroductionCD74HC4046AMT is a single-chip monolithic circuit designed with CMOS technology. It is a highly integrated, high-performance and cost-effective clock/timing-related functional module that can be used to generate, divide and process signals.Application fieldCD74HC4046AMT is widely used in modern electronic products, instrumentation, automotive and communications systems. It is widely used in radio, medical and industrial control systems, audio-visual equipment, card reader equipment and industrial robots. Its main application fields are:Clock Generation:CD74HC4046AMT can be used to generate clock signals of different frequencies. It can be used to generate nearly any frequency of result signals from an input signal of a given frequency. In addition, the built-in two-input multiplexer can be used to provide the necessary clock signals for systems that need to switch between multiple clock signals.Frequency Synthesizers:The CD74HC4046AMT\'s on-chip PLL can be used for frequency synthesizers applications. It allows for a wide range of frequencies to be generated from an input signal of a given frequency. The built-in phase detection circuitry and integrator allows for accurate frequency measurements and control. This makes the module ideal for applications such as radio communications devices, wireless systems and audio/video equipment. Timing Circuits:The CD74HC4046AMT can also be used to implement timing circuits. It can be used to generate signals at specific intervals, with adjustable ON and OFF times. The module comes with built-in circuits that enable adjustable pulse width and frequency control, making it ideal for applications such as industrial automation, medical equipment, automotive systems and others.Working PrincipleCD74HC4046AMT is mainly composed of two different circuits, the voltage controlled oscillator (VCO) and the phase-locked loop (PLL). The VCO is responsible for generating and modulating the output signal at frequencies determined by the input voltage. The PLL uses the input signal and the output signal of the VCO to generate a precise and stable output signal, with a frequency that depends on the input signal.The PLL is the most important component in a CD74HC4046AMT. It is a feedback system that consists of four parts: a phase comparator, a voltage-controlled oscillator (VCO), an integrated circuit, and a variable frequency divider. The phase comparator compares the frequency and phase of the input signal and the output signal of the VCO. When the two signals are not in phase, the phase comparator will output a corrected signal to the VCO, which will then adjust its frequency to match the input signal. The output frequency of the VCO is determined by its input voltage, which is controlled by the output of the phase comparator.Conclusion The CD74HC4046AMT is a cost-effective, highly integrated, and versatile chip designed for the clock/timing-related applications. It can be used to generate, divide, and process signals, such as clock signals of different frequencies, frequency synthesizers, and timing circuits. The inherent PLL and VCO functionalities of the chip make it especially suitable for applications in fields such as radio, medical and industrial control systems, audio-visual equipment, card reader equipment and industrial robots.

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