Hopkinton, Mass. Valpey Fisher Corp. has introduced two jitter attenuators for synchronous Ethernet applications. The VFJA910 jitter attenuator provides two LVCMOS outputs with a frequency of 25 MHz, while the VFJA911 device provides a LVPECL output with a frequency of 25 MHz.
With less than 0.4 dBc of jitter peaking both the VFJA910 and VFJA911 allow for cascading multiple stages within the network. A select input allows the user to switch from the external input reference to a free-run mode. In free-run mode the devices
output a 25-MHz clock that is not locked to the input reference frequency.
Operating with a +3.3 volt power supply the VFJA910 typically consumes 120 mW and the VFJA911 typically consumes 135 mW. Both devices offer an ultra-low jitter of 0.25 ps RMS. Phase noise is -140 dBc/Hz at 1 KHz for the VFJA910 and 138 dBc/Hz at 1 KHz for the VFJA911. The devices are available in a 15.0 x 13.0 mm surface-mount package.
Pricing: $22 to $25 at 1,000 pieces.
Product information: jitter attenuators
Valpey Fisher Corp., 1-800-982-5737 or 1-508-435-6831, www.valpeyfisher.com