Frequency Range On LVPECL Output of CY22394.

Question: Does the CY22394 support frequencies less than 100 MHz on the LVPECL output? Both the PLL selection window and the divider window are grayed out for a default of PLL1 and divide by '1'. Also Cyclock RT does not allow a selection of low frequency in the 25 MHz range.

 

Answer:

The CY22394 PECL output frequency range is from 100-400MHz, and the divider value is fixed to 1. Other Cypress devices (such as the CY2DP814, which works from DC to 400MHz) can take in a single-ended input and output a differential pair. Also, look at High Performance Buffers with LVPECL outputs. You can select from the parametric search at the following link: http://www.cypress.com/?id=3417&addcols=&parametric=html&filter_201=LVPECL