MM74HC4046SJ

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The MM74HC4046SJ is part of the Clock/Timing family of devices from Fairchild Semiconductor. This particular device is a Monolithic Phase-Locked Loop (PLL) with two voltage-controlled oscillators (VCOs), includes three digital frequency dividers, a built-in phase detector, and a high accuracy internal reference clock. It is ideal for a wide range of applications such as clock/frequency conversion, clock recovery, clock jitter clean-up, and clock synchronization.

The primary application field of the MM74HC4046SJ PLL is in the area of clock and timing. It is used to generate clocks and synthesize frequencies, as well as recovering precise clock signals from noisy sources. It can also be used to correct the jitter and phase errors in clock signals. When it is used to generate clock or frequency signals, it can be configured in either a frequency synthesizer or a clock generator mode.

The working principle of the MM74HC4046SJ PLL is based on the concept of frequency synthesis. This process involves the adjustment of a control voltage that dictates the output frequency, as well as a feedback loop that allows the output to be compared with the reference clock. The device contains a voltage-controlled oscillator (VCO), a phase detector, a fixed frequency oscillator, and three digital divide-by-N counters. The VCO generates an output frequency based on the control voltage and, when locked to the reference clock, can be divided accurately and repeatedly to generate a precision output frequency.

The reference and control inputs of the PLL are used to input the reference clock and control voltage, respectively. The reference clock is used to synchronize the input circuitry, and the control voltage is adjusted to set the output frequency. The output of the PLL is monitored and compared to the reference clock, allowing the loop to adjust the output frequency and keep it in lock with the reference clock over changes in supply voltage and temperature. The three digital divide-by-N counters divide the output frequency accuracy and enhance the stability of the system.

The use of the MM74HC4046SJ PLL in clock and timing applications is invaluable. This particular device can be used in a variety of applications, including clock and frequency conversion, recovery, jitter clean-up, and synchronization. It is an accurate and cost-effective way to generate precise clock signals and synthesize frequencies, as well as correct clock signal jitter and phase errors.

The specific data is subject to PDF, and the above content is for reference