ICS853111-02 Datasheet, PDF (8/18 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-10 DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
ICS853111-02
LOW SKEW, 1-TO-10
DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER
APPLICATION INFORMATION
WIRING THE DIFFERENTIAL INPUT TO ACCEPT SINGLE ENDED LVCMOS LEVELS
Figure 2A shows an example of the differential input that
can be wired to accept single ended LVCMOS levels. The
reference voltage level V_BB generated from the device is
connected to the negative input. The C1 capacitor should
be located as close as possible to the input pin.
VCC
Single Ended Clock Input
V_REF
C1
0.1u
R1
1K
PCLK
nPCLK
R2
1K
FIGURE 2A. SINGLE ENDED LVCMOS SIGNAL DRIVING DIFFERENTIAL INPUT
WIRING THE DIFFERENTIAL INPUT TO ACCEPT SINGLE ENDED LVPECL LEVELS
Figure 2B shows an example of the differential input that
can be wired to accept single ended LVPECL levels. The
reference voltage level V_BB generated from the device is
connected to the negative input. The C1 capacitor should
be located as close as possible to the input pin.
VDD(or VCC)
853111AY-02
CLK_IN
C1
0.1uF
+
VBB
-
FIGURE 2B. SINGLE ENDED LVPECL SIGNAL DRIVING DIFFERENTIAL INPUT
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8
REV. A JANUARY 10, 2006