83905AK-01LF

Clock/Timing – Clock Buffers, Drivers, are devices commonly used in modern digital systems to generate and synchronize system clocks.

83905AK-01LF is a clock buffer, driver, or phase locked loop (PLL) device. Its applications include clock signal distribution, signal fan-out, phase noise reduction and signal synthesis applications.

A typical application field for 83905AK-01LF is to improve the system performance and reliability by reducing the number of clock signal crossing on the system board and providing better signal routing for sensitive logic circuits.

The device consists of four or eight clock input/output channels, each with a programmable voltage gain of up to 4.5V, and a power supply voltage range of 1.5V to 5.5V. The unique features of this device are the selectable single-ended/differential input and output modes, the adjustable output voltage level up to 4 channels, and active output loading.

The device also supports a wide range of clock inputs, such as 18/24MHz, 27MHz and other high frequency signals, and has a programmable output slew rate. The device features a built-in programmable clock synthesis in which a single reference clock is used to generate any number of output clocks specific to the project needs, such as those from different frequency bands.

The working principle of 83905AK-01LF is to combine the clock inputs using multiplexers to allow for on-the-fly switching between them. The device also consists of a PLL with variables for internal frequency-setting and voltage reference levels to establish the desired output frequency and voltage level. The PLL functions by comparing the system clock signal with a feedback signal and adjusting the loop parameters to maintain a stable system output. The device then converts the reference clock signal into the necessary timing signals with added features such as output rising and falling edge delays, output slew rate control and channel grouping.

Overall, 83905AK-01LF is a very useful device for clock signal distribution, fan-out, noise reduction and signal synthesis. It provides flexibility, numerous features and improved signal integrity, making it one of the best devices in its class.