74HC4046AN,652

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The 74HC4046AN and 652 are popular clock and timing devices used in clock generators, phase lock loops (PLLs) and frequency synthesizers. They have different applications and working principles, yet they share the same goal: providing reliable and accurate timing signals.

The 74HC4046AN is a CMOS programmable oscillator and timer. It is designed to operate over a wide voltage range of 2.0 to 5.5V. The device has two independent output ports, one for true (Q) and the other for complement (Qbar) output. It also features an adjustable timing resistor and can be programmed to a wide range of operating frequencies through the programming current. Its exceptional accuracy of 0.2%, low power, and output enable and reset functions make it an excellent choice for many different applications.

The 652 frequency synthesizer is a PLL-based device. It incorporates a voltage-controlled oscillator (VCO) and a phase/frequency detector into a closed-loop circuit to generate output frequency. The 652 operates over a wide frequency range of 300MHz to 6GHz, and it has a built-in step size of 0.1 GHz. It is especially suitable for frequency agile applications, such as satellite communication and broadband signal transmission, where fast frequency switching is required. The 652 can also be used in applications that require a low jitter output signal.

In conclusion, the 74HC4046AN and 652 are valuable components in clock and timing applications. The 74HC4046AN is a programmable oscillator and timer, while the 652 is a frequency synthesizer. Together, they provide the user with reliable and accurate timing signals over a wide range of operating frequencies. Both components are available from a variety of sources, making them ideal solutions for a variety of applications.

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