General Description

The 8V34S208 is a differential 1:8 LVDS fanout buffer with a 2:1

input multiplexer. The device accepts DC to 250MHz clock and data

signals and is designed for 1Hz clock /1PPS, 2kHz and 8kHz signal

distribution. Controlled by the input mode selection pin, the

differential input stages accept both rectangular or sinusoidal

signals. The 8V34S208 also provides level translated

LVCMOS/LVTTL outputs which are copies of the individual

differential inputs CLKA and CLKB. The propagation delay of the

device is very low, providing an ideal solution for clock distribution

circuits with tight phase alignment requirements. The multiplexer

select pin (SEL) allows to select one out of two input signals, which

is copied to the four differential outputs.

Features

• Designed for 1PPS, 2kHz, 8kHz and 10MHz GPS clock signal

distribution

• High speed 1:8 LVDS fanout buffer

• Eight differential LVDS output pairs

• 2:1 input multiplexer

• Two selectable differential inputs accept LVDS and LVPECL

signals

• Accepts rectangular and sinusoidal input signals

• Two input monitoring outputs (LVCMOS)

• Max output frequency: 250 MHz

• Additive RMS phase jitter:

118fs (typical) at 100Mhz (12k-20Mhz)

• Part-to-part skew: 250ps (maximum)

• Propagation delay: 325ps (typical), LVDS output

• Full 2.5V and 3.3V voltage supply

• -40°C to 85°C ambient operating temperature

• Lead-free 32-lead VFQFN (RoHS 6/6) packaging