Synchronous Ethernet

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Synchronous Ethernet

Valpey Fisher is the first in the industry to offer quartz crystal-based integrated timing modules that provide a single chip solution for the reliable synchronization of Ethernet Networks.

The VFJA432 and VFJA434 Jitter Attenuators can synchronize to common telecom frequencies such as 8KHz and 19.44MHz from the backplane or common Ethernet frequencies such as 25MHz and 125MHz from the physical layer. The input frequency is selectable from four preset frequencies. Once the timing module synchronizes to the input frequency, The VFJA432 and VFJA434 can provide dual and quad output frequencies, respectively, from 10MHz to 200MHz. The VFJA432 and VFJA434 exceed the requirements for Telcordia GR-1244-CORE, GR-253-CORE, ITU-T G.813, and G.8261.

Click on product shot to view data sheet.

SERIES	OUTPUT	F_IN	F_OUT	DESCRIPTION

VFJA905 19.5x15.5 mm	LVCMOS	2.5MHz, 25MHz or 125MHz	25MHz	Free Run Mode Dual Outputs <0.2ps Jitter RMS
VFJA910 15.0x13.0 mm	LVCMOS	25MHz	25MHz	Free Run Mode Dual Outputs <0.25ps Jitter RMS
VFJA911 15.0x13.0 mm	LVPECL	25MHz	25MHz	Free Run Mode No external components required <0.2ps Jitter RMS
VFJA915 19.5x15.5 mm	LVCMOS	2.5MHz, 25MHz or 125MHz	25MHz	Free Run Mode -143dBc/Hz @ 1KHz <0.2ps Jitter RMS
VFJA402 19.5x15.5 mm	LVPECL	8KHz - 200MHz	10MHz - 200MHz	3 Selectable Inputs Free Run Mode <0.2ps Jitter RMS
VFJA430 19.5x15.5 mm	LVCMOS	8KHz - 200MHz	10MHz - 200MHz	3 Selectable Inputs Free Run Mode <0.2ps Jitter RMS
VFJA432 19.5x15.5 mm	CMOS	8KHz - 200MHz	10MHz - 200MHz	4 Selectable Inputs Dual Outputs <0.18ps Jitter RMS
VFJA434 19.5x15.5 mm	CMOS	8KHz - 200MHz	10MHz - 200MHz	4 Selectable Inputs Quad Outputs <0.18ps Jitter RMS