SI5319A-C-GMR

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SiTime’s SI5319A-C-GMR is a high-performance clock generator that provides integrated voltage-controlled crystal oscillator (VCXO), jitter attenuator, and programmable output divider solutions in a small 5mm x 7mm TSSOP 28 package. It is used in any application where the requirement for an ultra low-power, low jitter and space savings is desired. It integrates an on-chip temperature compensated Voltage Controlled Oscillator (VCO) with a high-precision frequency control loop that provides excellent jitter attenuation of 30 fs integrator bandwidths. In addition, the SI5319A-C-GMR offers a programmable on-chip output divider with a range of divide-by-1 to divide-by-128, making it an ideal solution for applications requiring a wide range of output frequencies.

The SI5319A-C-GMR is ideal for point-to-point applications, such as communications and networking applications, as well as mid- to high-end consumer and professional audio-video products. The device is also well-suited for embedded designs where guaranteed performance is essential, such as Set-Top-Boxes, PC video cards, routers, switches, mobile devices, GPS systems and the burgeoning wearables marketplace.

The SI5319A-C-GMR is a highly integrated, low-power device designed for a variety of timing needs. It features a low-power oscillator core that consumes 66mW to ensure low-power operation of the system. To ensure maximum reliability, the SI5319A-C-GMR utilizes an on-chip automatic gain control circuitry and temperature compensated frequency control loop to ensure stability over temperature.

The basic operation of the SI5319A-C-GMR is to provide an output clock signal that is derived from a reference clock signal. The reference clock signal is generated by an external crystal oscillator (XO) and is connected to the XIN and XOUT pins. The signal on the XIN/XOUT pins is then routed to the VCO core where it is multiplied to produce the output clock. The output clock is then divided down to the desired frequency using the programmable divider and provided at the OUTPUT pins.

The SI5319A-C-GMR and its sister device, the SI5318B-C-GMR, provide a variety of features designed for a variety of applications. Both devices feature integrated phase-locked loop (PLL) and dual modulus prescaler architectures to multiply or divide the input frequency to a desired frequency or divide-by value. In addition, the SI5319A-C-GMR supports a wide range of frequencies from 10 to 800MHz, and supports adjustable output skews. The SI5318B-C-GMR also supports jitter attenuation of up to 30 fs for high-performance systems, and fully integrated spread-spectrum capabilities.

In conclusion, the SI5319A-C-GMR is an incredibly versatile and reliable device that can be used in a variety of applications. It offers a unique combination of low-power, low-jitter, programmable divider and integrated jitter attenuation capabilities that make it a great choice for a wide range of applications. The ability to support a variety of frequencies and output skews make it an ideal solution for high-performance systems and wearable applications. The on-chip automatic gain control and temperature compensated frequency control loop provide maximum system stability, ensuring reliable performance even in harsh environments.

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