ZL40204LDG1

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The ZL40204LDG1 is a monolithic phase-locked loop (PLL) clock synthesizer designed for clock generation and clock distribution applications. This device has a spread spectrum clock output and can be used to reduce the energy needed to power a system or to reduce EMI emissions. It is designed to operate from a wide supply voltage of 2.7V to 5.5V and nominal output frequency of up to 200MHz.

The ZL40204LDG1 is primarily intended for use in clock generation and clock distribution applications. It includes two internal PLLs and two dual differential analog multiplexers (MUX). PLLs can be used to develop a stable clock signal from an input clock signal that is too noisy, too slow, or otherwise unsuitable. The differential MUXs are used to select up to four different clock sources and combine them to create a single output clock. The ZL40204LDG1 can be used to generate and distribute clocks based on lower speed reference clocks, reducing the amount of energy used or emitted.

The ZL40204LDG1 utilizes several methods to reduce EMI emissions, such as deskew functions and spread spectrum clock outputs. Deskew functions enable the output clock signal to adjust the phase and frequency of the clock until it matches the source clock, thus reducing harmonic content. Additionally, spreading the spectrum of the output clock also reduces harmonic content, which reduces EMI emissions. Spread spectrum clock outputs reduce RFI and EMI emissions from equipment using the output clock as a reference. The ZL40204LDG1 also includes clock dividers and multipliers, enabling low power clock generation and clock distribution.

The ZL40204LDG1 includes an on-chip phase locked loop (PLL). It can be configured to operate as a synchronous feedback network that locks the output frequency to the reference clock frequency. The feedback network can be configured to reduce output jitter and increase the frequency stability of the output. The ZL40204LDG1 can also be configured as an asynchronous clock distribution device, where the outputs are delayed by a certain amount relative to the reference clock. This asynchronous feature can be used to spread the spectrum of the clock signal, thus reducing EMI emissions.

The ZL40204LDG1 is a versatile clock synthesis device that can be used for various applications. It can be used for clock generation and clock distribution, as well as for reducing EMI emissions in sensitive applications. It is designed to operate from a wide range of supply voltages, enabling low power operation and clock generation. It is capable of providing stable output frequency and reducing jitter levels in various applications. With its deskew and spread spectrum output features, it is an ideal solution for applications where EMI emission reduction is a top priority.

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