ICS85222 Datasheet, PDF (6/12 Pages) Integrated Circuit Systems – DUAL LVCMOS / LVTTL-TO DIFFERENTIAL LVHSTL TRANSLATOR

Integrated
Circuit
Systems, Inc.
ICS85222
DUAL LVCMOS / LVTTL-TO-
DIFFERENTIAL LVHSTL TRANSLATOR
APPLICATION INFORMATION
SCHEMATIC EXAMPLE
Figure 1 shows a schematic example of ICS85222. In this ex-
ample, the inputs are driven by 7Ω output LVCMOS drivers with
series terminations.The decoupling capacitors should be physi-
cally located near the power pin. For ICS85222, the unused out-
put need to be terminated.
VDD=3.3V
Q1
Ro ~ 7 Ohm
Zo = 50 Ohm
R5 43
Driver_LVCMOS
VDD=3.3V
Q2
Ro ~ 7 Ohm
R6 43
Driver_LVCMOS
Zo = 50 Ohm
U1
5
6
7
8
GND
CLK1
CLK0
VDD
ICS85222
VDD=3.3V
C1
0.1u
4
nQ1
Q1
nQ0
Q0
3
2
1
Zo = 50 Ohm
Zo = 50 Ohm
R1
50
Zo = 50 Ohm
Zo = 50 Ohm
R3
50
-
+
R2
50 LVHSTL Input
-
+
R4 LVHSTL Input
50
FIGURE 1. ICS85222 LVHSTL BUFFER SCHEMATIC EXAMPLE
85222AM
www.icst.com/products/hiperclocks.html
6
REV. B MARCH 31, 2005