Lentark Pwm Signal Generator 3 Channel Frequency and Duty Cycle UART Control
$8.18Price
PS504F0A-02W30 is a PWM core with 5V input voltage and three channel signal output. The frequency and duty cycle characteristics of the PWM channels can be defined separately. Signal outputs have amplitudes of 5V. It has a maximum tolerance of ± 0.2% in the 4 Hz - 500 KHz band and also has the ability to be calibrated for operations in lower frequency bands.
https://www.lentark.com/download.php?filename=PS504F0A-02W30EN.pdf