ICS853014 Datasheet, PDF (11/17 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-5 2.5V/3.3V DIFFERENTIAL-TO-LVPECL/ECL FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
ICS853014
LOW SKEW, 1-TO-5
2.5V/3.3V DIFFERENTIAL-TO-LVPECL/ECL FANOUT BUFFER
SCHEMATIC EXAMPLE
This application note provides general design guide using
ICS853014 LVPECL buffer. Figure 6 shows a schematic example
of the ICS853014 LVPECL clock buffer. In this example, the in-
put is driven by an LVPECL driver. CLK_SEL is set at logic high
to select PCLK1/nPCLK1 input.
3.3V
Zo = 50
Zo = 50
LVPECL Driv er
3.3V
U1
R12 1K
3. 3V
C2
11
12
13
14
15
16
17
18
19
3.3V 20
VEE
CLK_SEL
PCLK0
nPCLK0
VBB
PCLK1
nPCLK1
VCC
nEN
VCC
R9 R10
50 50
0.1u
C1
0.1u ICS853014
C5
0.1u
R 11
R7 1K
50
10
nQ4
Q4
nQ3
9
8
7
Q3
nQ2
6
5
Q2
nQ1
Q1
nQ0
Q0
4
3
2
1
Zo = 50
Zo = 50
Zo = 50
Zo = 50
+
-
R2
R1
50
50
R3
50
C3
0.1u
+
-
R5
R4
50
50
R6
50
C4
0.1u
FIGURE 6. EXAMPLE ICS853014 LVPECL CLOCK OUTPUT BUFFER SCHEMATIC
853014BG
www.icst.com/products/hiperclocks.html
11
REV. C MAY 13, 2005