ICS281PGI

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ICS281PGI is a type of programmable clock generator for high-performance and low-power applications. It enables synthesizing complex clock frequencies and distributing them to numerous system nodes. This integrated IC can reduce component cost in chipsets, networking, digital TV and other devices. Furthermore, it consumes very low power and requires no external components.

This programmable clock generator features high clock jitter performance, low power consumption, and integrated phase locked loop (PLL) frequency synthesizer. It can generate an output frequency up to 200 MHz while allowing the input frequency to vary from 3.3 MHz to 8 MHz. It comes with programmable domain multiplication, division and clock synchronization features. Additionally, it features spread spectrum modulated outputs and glitch-free switching. With a single-ended input and dual-ended outputs, the ICS281PGI helps reduce system costs and improve signal integrity in various clock applications.

Working principle

ICS281PGI is based on a frequency synthesizer architecture with a fully integrated voltage-controlled oscillator (VCO). It works on the principle of harmonic division or multiplication of the clock signal. The idea is that a harmonic division or multiplication of a signal will produce an output signal with the same shape but different frequency. This means that the generated signal can be used to drive the system clock. The signal generated by the frequency synthesizer can then be applied to the system nodes through either buffered outputs or fan-out buffers.

To program the PLL frequency synthesizer, its digital control loop uses a look-up table (LUT) to map the desired target frequency to the VCO gain, reference frequency and different clock dividers. When the output frequency reaches the desired value, a multiplier CMOS latch is used to fine-tune the frequency. The ability to independently adjust the reference frequency and various dividers makes the ICS281PGI an ideal choice for low-power and high-performance clock generation.

Application field

ICS281PGI is widely used in various applications such as microprocessor-based systems, embedded systems, communications networks, computers, control systems, storage systems, and other ICS. In microprocessor-based systems, the clock generator is used to provide a fixed clock frequency to the microprocessor. This helps in ensuring the fast and accurate performance of the processor. In communication networks, this programmable clock generator is used to synchronize different nodes of the network. This helps in maintaining the integrity of the communication.

The ICS281PGI is also used in storage systems to provide a fixed clock frequency for data transfer. This helps in increasing the reliability of data transfer between storage devices. In computers, it is used to synchronize the various components of the system. This ensures the smooth functioning of applications and other hardware components.

The ICS281PGI also helps to reduce system cost and improve signal integrity. With its single-ended input and dual-ended outputs, it helps reduce the need for external components, which reduces the system cost. Additionally, its ability to synthetize complex clock frequencies and redistribute them helps to improve the signal integrity of the system.

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