ICS853111 Datasheet, PDF (7/13 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-10 DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS853111
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 generated from the device is connected to
BB
the negative input. The C1 capacitor should be located as close
as possible to the input pin.
VDD(or VCC)
8 5 3 111 AY
CLK_IN
C1
0.1uF
+
VBB
-
FIGURE 2B. SINGLE ENDED LVPECL SIGNAL DRIVING DIFFERENTIAL INPUT
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7
REV. D JULY 22, 2003