PRELIMINARY
ICS889832
Integrated
Circuit
Systems, Inc.
LOW SKEW, 1-TO-4 DIFFERENTIAL-
TO-LVDS FANOUT BUFFER
RECOMMENDATIONS FOR UNUSED OUTPUT PINS
OUTPUTS:
LVDS Output
All unused LVDS outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential
output pair should either be left floating or terminated.
2.5V LVDS DRIVER TERMINATION
Figure 2 shows a typical termination for LVDS driver in
characteristic impedance of 100Ω differential (50Ω single)
transmission line environment. For buffer with multiple LDVS
driver, it is recommended to terminate the unused outputs.
2.5V
2.5V
LVDS_Driv er
+
R1
100
-
100 Ohm Differential Transmission Line
100Ω Differential Transmission Line
FIGURE 2. TYPICAL LVDS DRIVERTERMINATION
889832AK
www.icst.com/products/hiperclocks.html
REV. A JANUARY 23, 2006
9
SPECTRUM [ SPECTRUM MICROWAVE, INC. ]
