Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good PCB design practices, such as keeping the input and output traces short, using a solid ground plane, and minimizing noise coupling. Additionally, consider using a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
To ensure accurate clock output frequency, make sure to use a high-quality crystal oscillator with a tight tolerance (e.g., ±20 ppm) and follow the recommended crystal loading capacitance values. Also, ensure that the PCB layout is optimized for minimal noise and jitter.
Although the datasheet doesn't specify a maximum input frequency, the CDCEL937 is designed to handle input frequencies up to 250 MHz. However, it's essential to consider the input signal quality, noise, and jitter when operating at higher frequencies.
Yes, the CDCEL937 can be used as a clock buffer or repeater. It can fan out a single input clock signal to multiple output clocks, and its low additive jitter and skew make it suitable for clock distribution applications.
The CDCEL937 has a programmable output frequency divider, which allows you to configure the output frequency using the SEL0-SEL2 pins. Refer to the datasheet for the specific pin configurations and frequency tables to achieve the desired output frequency.
CDCEL937QPWRQ1 datasheet
by Texas Instruments
