SI5338J-B-GMR

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The Si5338J-B-GMR is an application-specific device by Silicon Labs, which is most commonly used in clock and timing systems. The Si5338J-B-GMR is a highly integrated, low-power, pulse-width modulation (PWM) configurable clock and timing system that delivers consistent PWM performance in a single die design and can be configured to meet the needs of the most demanding applications. This versatile device can be configured to generate PWM outputs with programmable frequencies, duty cycles, and pulse widths.

Features

• Wide power supply range from 2.7 to 5.5V
• Configurable fan speed control pulse width and frequency
• Configurable duty cycle and pulse width
• Programmable default PWM frequency
• Programmable minimum on-time
• Synchronous and asynchronous PWM outputs
• Programmable phase delay between PWM outputs
• Software selectable spread spectrum clocking
• Configurable programmable GPIOs

Applications

The Si5338J-B-GMR is ideal for applications that require precise control of pulse width and frequency, such as fan speed control, light dimming, processor thermal management, and power management. It can be used in a wide variety of applications, including PCs, laptop computers, servers, and more. Additionally, it is compatible with a wide range of operating systems, including Windows, Linux, and MacOS.

Working Principle

The Si5338J-B-GMR provides precise control of pulse width and frequency through use of a configurable loop filter. The loop filter sets the corner frequency of the pulse width modulator, which affects the rate of change of the pulse width and the stability of the clock oscillator. The pulse width modulator consists of a threshold-switching comparator and a sample-and-hold circuit, which allows for a wide range of frequencies and duty cycles.

The device provides low jitter and fast lock times through its advanced reference clock, which is programmable up to 400MHz. It is also capable of holding frequency and phase relationships over a wide range of temperatures, including extreme cold environments. Additionally, the device also includes system-level synchronization and spread-spectrum clocking capabilities.

The device is also optimized for low power consumption, making it ideal for battery-powered and other power-sensitive applications. This feature is enabled through the use of a low power oscillator, power control sequencing, and low-leakage dynamic voltage scaling. The device can operate with a power supply range of 2.7V-5.5V for maximum flexibility.

Conclusion

The Si5338J-B-GMR is a highly-integrated clock and timing system from Silicon Labs, designed for maximum flexibility and precise control. Its wide range of features, including configurable PWM outputs, programmable GPIOs, and advanced system synchronization capabilities, make it ideal for a variety of applications, including processor thermal management, power management, and fan speed control. Additionally, its low power requirements make it suitable for battery-powered applications. It is a versatile device capable of providing reliable and consistent clock and timing solutions for the most demanding applications.

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