ICS85222-01 Datasheet, PDF (7/13 Pages) Integrated Circuit Systems – DUAL LVCMOS / LVTTL-TO DIFFERENTIAL

Integrated
Circuit
Systems, Inc.
ICS85222-01
DUAL LVCMOS / LVTTL-TO-
DIFFERENTIAL HSTL TRANSLATOR
SCHEMATIC EXAMPLE
Figure 2 shows a schematic example of ICS85222-01. In this
example, the inputs are driven by 7Ω output LVCMOS drivers
with series terminations. The decoupling capacitors should be
physically located near the power pin. For ICS85222-01, the
unused output need to be terminated.
VDD=3.3V
Q1
Ro ~ 7 Ohm
Zo = 50 Ohm
R5 43
Driv er_LVCMOS
VDD=3.3V
Q2
Ro ~ 7 Ohm
R6 43
Driv er_LVCMOS
Zo = 50 Ohm
U1
5
6
7
8
GND
CLK1
CLK0
VDD
ICS85222-01
VDD=3.3V
C1
0. 1u
nQ1
Q1
nQ0
Q0
4
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 2. ICS85222-01 HSTL BUFFER SCHEMATIC EXAMPLE
85222AM-01
www.icst.com/products/hiperclocks.html
7
REV. A NOVEMBER 15, 2005