PL602-21SI

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Clock generators, Phase Lock Loops (PLLs), and Frequency Synthesizers are digital ICs manufactured by many top companies, such as NXP. A popular example of one such IC is the PL602-21SI, which is known for its various features and specifications. By understanding the application fields and workings of such ICs, designers can create efficient, effective products with the help of these ICs.

The PL602-21SI enables very low jitter operation, ideal for clock synchronization applications such as in communication, industrial and consumer products. It is designed to interface with the latest I²C or SPI buses to support a wide array of configurations, and allows for on board low power reconfiguration through Pulse Width Modulation (PWM). This helps customers to quickly and easily adjust clock signal parameters to satisfy their specific applications.

Speaking of applications fields, the PL602-21SI is well suited to providing timing signals for networking and communication products, and also for high frequency clocks in television and digital signal processing designs. It can be used as a general-purpose clock generator as well, as in digital video equipment where it can easily be configured as an NTSC, PAL or SECAM video generator. It is also used in Secure Sockets Layer (SSL) technology.

Now, let us take a look at the working principle of the PL602-21SI. It is based on a Phase locked Loop (PLL) which is usually used to continuously adjust frequencies in order to maintain synchronization of signals. It uses a feedback loop to rapidly adjust the frequency or phase of its output to match the frequency or phase of the external input signal. This ensures that the output signal will remain in synchronization with the reference signal, even when its frequency or amplitude varies slightly.

The IC includes an integrated, low-noise voltage controlled oscillator (VCO), a programmable divider, an input frequency comparator and an internal phase frequency detector. The IC draws power from a logic supply voltage (1.8V to 2.5V) and core voltage (0.95V to 1.15V). It can be used in either single-ended or differential drive modes, and it can also be configured as a spread spectrum clock generator, to further reduce EMI noise.

The PL602-21SI has a programmable frequency range, with two selectable divide ratios of 6 and 8. A full cycle counter is available, with integrated phase margin control, to simplify applications which require cycle-accurate phase detection (e.g. triggering). It also has an integrated 10-bit phase margin control, to allow fine tuning of the phase margin.

The PL602-21SI also has an integrated charge pump PLL, which helps to ensure that the PLL is stable even with very large changes in input frequency. This means that it can maintain synchronization even at low frequencies, thus having excellent response time and low jitter performance. It also has an integrated Spread Spectrum PLL, to reduce EMI issues and ensure compliance with EMI regulations.

In summary, the PL602-21SI is a highly efficient, feature-rich IC suitable for a wide range of clock synchronization applications. Its ability to interface with I²C and SPI buses offers many opportunities for designers to create functional, high-performance products. Its Phase Locked Loop architecture ensures that the output signal remains in synchronization with the reference signal. Its integrated Spread Spectrum PLL ensures EMI compliance. Its integrated 10-bit phase margin control offers fine tuning of the phase margin. All these features make the PL602-21SI an optimal choice for a variety of applications.

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