NB2308AC4DG

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NB2308AC4DG is a type of device known as a clock generator, phase-locked loop (PLL) frequency synthesizer or clock multiplier. It is designed to generate accurate frequency signals to meet specific system needs. Clock generator, PLL frequency synthesizers and clock multipliers are used in a wide range of applications, from cell phone and computer systems to medical, military and aerospace applications.

A clock generator is an electronic circuit used for generating a stable clock signal from an external source, such as a crystal oscillator, a voltage-controlled oscillator or a temperature-controlled oscillator. Clock generators use phase-locked loops (PLLs) to ensure that the generated clock signal has a consistent phase relationship with the reference signal. PLL frequency synthesizers provide multiple outputs from a single PLL circuit and are commonly used in multimedia systems and enterprise networks.

The NB2308AC4DG is a PLL frequency synthesizer used to generate multiple high-frequency clock signals from a single low-frequency reference clock. This enables one reference clock to interface with multiple synchronous systems, such as DDR3/4, GDDR5, 2.5 V/1.8 V, PCI Express 2.0, Fibre Channel and Gigabit Ethernet. It has an integrated jitter attenuator, which helps to reduce jitter, which is a type of variance in the clock signal that can cause reliable communication or system failure. The device also provides spread spectrum frequency modulation (SSFM), allowing system designers to further reduce EMI.

The NB2308AC4DG is a highly flexible device with programmable mode and can be used as either a divider, multiplier or prescaler. As a divider, it can divide the reference clock by any integral factor between 2 and 127. As a multiplier, it can multiply the reference clock by any integral factor from 1 to 1023. As a prescaler, it can divide the reference clock input by any integer multiple of 2, 4, 8 and 16.

On the output side, the device can generate four different outputs with individually programmable output frequencies and duty cycles. Output 1 can operate a range of 2 – 160 MHz, Output 2 can operate a range of 2 – 160 MHz and Output 3/4 can operate a range 1 – 80 MHz. Each output can be enabled or disabled independently, allowing users to generate only the clocks they need.

Overall, the NB2308AC4DG is a great choice for system designers who need to generate multiple clock sources from a single low-frequency reference clock. The device’s integrated jitter attenuator and spread spectrum frequency modulation capabilities make it an ideal choice for high-performance systems where reliable operation and reduced EMI are essential.

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