IDT72P51359L5BB

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Specialized ICs such as the IDT72P51359L5BB are deployed to specific, intricate applications due to their enhanced characteristics compared to general-purpose ICs, including superior analog and digital performance, higher densities and multiple inputs and outputs.

The IDT72P51359L5BB is a high-speed, low jitter clock generator designed to reduce the complexity and cost of a clock distribution circuit. It features a low jitter phase locked loop (PLL) and spread spectrum modulation with a frequency output range of 50 to 800MHz. It offers the performance of a clock generator with PLL, yet requires minimal other external components. The part also features programmable spread spectrum for compliance with emission requirements.

The working principle of the IDT72P51359L5BB involves a two-stage process, beginning with the PLL circuit. The input clock of the IDT72P51359L5BB is typically 10 to 52MHz. A voltage controlled oscillator (VCO) and a phase comparator, both within the PLL circuit, control the frequency output of the generator. The VCO\'s output may be in a range of 500 MHz to 800MHz. The phase comparator compares the reference clock (10 to 52 MHz) and the VCO\'s output. When a difference exists, the phase comparator adjusts the frequency of the VCO until the reference clock and the VCO frequency match. When the two frequencies synchronize, the VCO output is locked. The VCO output is then divided down to the correct frequency, typically 50 to 800MHz.

The second stage of the operation involves the modulation of the clock signals. Spread spectrum modulation is used to reduce spectrum energy and act as an EMI shield. Depending on the settings, the output clock of the IDT72P51359L5BB may be modulated from a flat frequency to a sine wave or from Hopf or Bartley type frequency modulation. This helps reduce EMI significantly, making the IDT72P51359L5BB an ideal clock generator for high-speed networking applications.

The IDT72P51359L5BB offers a full suite of commands and alarm monitoring functions to make it easier to design with. It includes a slew rate limitation and an adjustable spread spectrum profile, as well as optional EMI-encoding to meet regulatory standards, and noise shaping capabilities.

In summary, the IDT72P51359L5BB clock generator belongs to the family of specialized ICs that has superior analog and digital performance, higher densities and multiple inputs and outputs, as opposed to general-purpose ICs. Its working principle, which involves a two-stage process of a PLL and spread spectrum modulation, helps reduce EMI, making it suitable for high-speed networking applications. With its comprehensive suite of commands, alarm monitoring functions and noise shaping capabilities, the IDT72P51359L5BB offers an enhanced solution for clock distribution circuits at an economical cost.

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