ICS853111-01 Datasheet, PDF (9/15 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-9 DIFFERENTIAL-TO-3.3V LVPECL/ECL FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
ICS853111-01
LOW SKEW, 1-TO-9
DIFFERENTIAL-TO-3.3V LVPECL/ECL FANOUT BUFFER
SCHEMATIC EXAMPLE
This application note provides general design guide using
ICS853111-01 LVPECL buffer. Figure 4 shows a schematic
example of the ICS853111-01 LVPECL clock buffer. In this
example, the input is driven by an LVPECL driver.
VC C
VCC
Zo = 50 Ohm
Zo = 50 Ohm
3.3V LVPECL
R9
50
C8 (Option)
0.1u
R4
1K
R10
50
R11
50
1
2 ^VCC
3 ^CLK_SEL
4
5
6
7
8
PCLK0
nPCLK0
VBB
PCLK1
nPCLK1
VEE
VCC
VCC=3.3V
(U1-9)
(U1-16)
VCC
(U1-25) (U1-32) (U1-1)
C1
0.1uF
C2
0.1uF
C3
0.1uF
C4
0.1uF
C5
0.1uF
Zo = 50
Zo = 50
+
-
R2
R1
50
50
C6 (Option)
R3
0.1u
50
24
Q3 ₂₃
nQ3 ₂₂
Q4
nQ4
Q5
nQ5
Q6
nQ6
21
20
19
18
17
U1
ICS853111
Zo = 50
Zo = 50
+
-
R8
R7
50
50
C7 (Option)
0.1u
R13
50
FIGURE 4. EXAMPLE ICS853111-01 LVPECL CLOCK OUTPUT BUFFER SCHEMATIC
853111AV-01
www.icst.com/products/hiperclocks.html
9
REV. A APRIL 25, 2005