HMC778LP6CE

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The HMC778LP6CE is a high performance, low cost clock and timing generator suitable for a variety of applications, such as those using spread spectrum technology. It offers unmatched flexibility, accuracy and performance with a 3.3 V single-supply operation, low noise and few external components, making it a value-packed choice for many applications.

The HMC778LP6CE features two programmable phase-locked loops, or PLLs, which allow for high accuracy frequency synthesis. The PLLs can be used for clock synchronization, jitter reduction and frequency multiplication, in addition to providing the ability to produce a wide range of frequencies from a single reference clock. The device also features an integrated fractional-N phase frequency detector, or PFD, and a digitally controlled oscillator, or DCO, for easy frequency tuning.

The HMC778LP6CE also includes a spread spectrum frequency clock generator with independently adjustable up and down chirp spread. The clock generator offers excellent EMI reduction performance in a wide range of communication, computing, consumer and industrial applications. The device also includes an integrated low noise spread spectrum clock generator, which can be used for clock synchronization, for jitter reduction or for frequency multiplication.

In operation, the HMC778LP6CE takes an input reference clock frequency in the range of 1.2 MHz to 140 MHz and produces two clock outputs of up to 1000 MHz. The PLL is used to generate a wide range of output frequencies based on the reference clock frequency. The PFD and DCO of the HMC778LP6CE provide excellent frequency tracking, allowing for the frequency accuracy of the outputs to be tightly controlled. The spread spectrum generator reduces EMI associated with high-frequency switching applications and also offers flexibility in configuring the spread spectrum clock profiles.

The HMC778LP6CE also includes integrated noise reduction circuitry and an adjustable loop bandwidth feature to provide additional flexibility in meeting a wide range of requirements. The integrated noise reduction circuitry helps reduce noise from external signals, while the adjustable loop bandwidth allows for tuning the response of the PLL to changes in the input reference clock frequency. The HMC778LP6CE also features a comprehensive set of output features, including a power-down mode, integrated clock gating and an adjustable spread modes for clocking a variety of devices.

In terms of applications, the HMC778LP6CE is ideal for providing high accuracy clock and timing signals for communication, computing and consumer electronics products, among others. It can be used for a variety of applications, such as clock synchronization, jitter reduction, frequency multiplication and spread spectrum frequency multiplication. The HMC778LP6CE also offers excellent EMI reduction performance, making it a value-packed choice for a variety of applications.

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