ICS853210 Datasheet, PDF (10/15 Pages) Integrated Circuit Systems – LOW SKEW, DUAL, 1-TO-5 DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
ICS853210
LOW SKEW, DUAL, 1-TO-5
DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER
LVPECL CLOCK INPUT INTERFACE
The PCLKx /nPCLKx accepts LVPECL, CML, SSTL and other
differential signals. Both V_SWING and V_OH must meet the V_PP
and V_CMR input requirements. Figures 4A to 4E show inter-
face examples for the HiPerClockS PCLKx/nPCLKx input
driven by the most common driver types. The input interfaces
suggested here are examples only. If the driver is from an-
other vendor, use their termination recommendation. Please
consult with the vendor of the driver component to confirm
the driver termination requirements.
3.3V
CML
Zo = 50 Ohm
Zo = 50 Ohm
3.3V
R1
R2
50
50
3.3V
PCLK
nPCLK
HiPerClockS
PCLK/nPCLK
2.5V
SSTL
Zo = 60 Ohm
Zo = 60 Ohm
2.5V
R3
R4
120
120
3.3V
PCLK
R1
R2
120
120
nPCLK
HiPerClockS
PCLK/nPCLK
FIGURE 4A. HIPERCLOCKS PCLK/NPCLK INPUT DRIVEN
BY A CML DRIVER
FIGURE 4B. HIPERCLOCKS PCLK/NPCLK INPUT DRIVEN
BY AN SSTL DRIVER
3.3V
Zo = 50 Ohm
LVPEC L
Zo = 50 Ohm
3. 3V
R3
R4
125
125
3.3V
PCLK
nPCLK _HiPerClockS
Input
R1
R2
84
84
3.3V
LVDS
Zo = 50 Ohm
R5
100
Zo = 50 Ohm
3.3V
3.3V
R3
R4
1K
1K
C1
PCLK
C2
nPCLK
H iPerC loc k S
PCLK/nPC LK
R1
R2
1K
1K
FIGURE 4C. HIPERCLOCKS PCLK/NPCLK INPUT DRIVEN
BY A 3.3V LVPECL DRIVER
FIGURE 4D. HIPERCLOCKS PCLK/NPCLK INPUT DRIVEN
BY A 3.3V LVDS DRIVER
3.3V
3.3V LVPECL
3.3V
Zo = 50 Ohm
R3
R4
84
84
C1
Zo = 50 Ohm
C2
R5
100 - 200
R6
100 - 200
R1
R2
125 125
3.3V
PCLK
nPCLK _HiPerClockS
PCLK/nPCLK
FIGURE 4E. HIPERCLOCKS PCLK/NPCLK INPUT DRIVEN
BY A 3.3V LVPECL DRIVER WITH AC COUPLE
853210AY
www.icst.com/products/hiperclocks.html
10
REV. A NOVEMBER 12, 2003