SI5381A-D06745-GMR

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Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers are important components in the world of electronic components. The SI5381A-D06745-GMR is a scalable clock generator and phase-locked loop (PLL) for low-to-medium frequency applications. It is designed to help reduce board space and cost. This article seeks to explain the application field and working principle of the SI5381A-D06745-GMR.

The SI5381A-D06745-GMR comes in a 5 x 5 mm package and can be used in a wide variety of applications, from clock sources in a system-on-chip (SoC) or an Ethernet switch to TV tuners. Its functions can replace discrete components such as multiple crystal oscillators, divider, PLL, and VCXO. Its application fields include telecommunications, consumer electronics, high-end consumer electronics, automotive and industrial electronic systems.

The SI5381A-D06745-GMR draws its power from either 3.3 V or 2.5 V in order to provide a wide range of frequency outputs ranging up to 400 MHz. It operates within a temperature range of -40℃ to +85℃, making it suitable for use in a variety of environments. The device\'s 4-channel output makes it highly flexible, with up to four voltage-controlled crystal oscillators (VCXOs) or clock-and-data recovery (CDR) operating in any combination of LVDS, LVCMOS, or HCSL formats.

The SI5381A-D06745-GMR contains several components that allow it to generate multiple output frequencies, including: a voltage-controlled crystal oscillator (VCXO), a programmable divider, a phase/delay locked loop (PLL) circuit, and a programmable output delay line. The VCXO provides a time base reference to the programmable divider to adjust the frequency of the output signal. The PLL circuit compares the divider output signal to an input reference signal to determine the difference between them. This difference is used to adjust the output frequency of the VCXO, thereby maintaining the specified frequency ratio.

The SI5381A-D06745-GMR also includes an output delay line that can be used to adjust the time relationships between outputs. It can also be used to minimize jitter and minimize the number of differential pairs required in PCB layouts. The output delay line provides up to ~350ps of relative delay tuning resolution between outputs in increments of ~135ps.

In summary, the SI5381A-D06745-GMR is a highly flexible clock generator and PLL for medium- to low-frequency applications. Its scalability makes it an ideal choice for a wide range of applications, from SoCs to TV tuners. Its device components include a VCXO, PLL circuit, programmable divider, and output delay line, which all help to generate multiple output frequencies and minimize PCB layout hassle.

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