ICS889874 Datasheet, PDF (10/14 Pages) Integrated Circuit Systems – DIFFERENTIAL-TO-LVPECL BUFFER/DIVIDER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS889874
1:2
DIFFERENTIAL-TO-LVPECL BUFFER/DIVIDER
3.3V LVPECL INPUT WITH BUILT-IN 50Ω TERMINATIONS INTERFACE
The IN /nIN with built-in 50Ω terminations accepts LVDS, by the most common driver types. The input interfaces sug-
LVPECL, LVHSTL, CML, SSTL and other differential signals. gested here are examples only. If the driver is from another ven-
Both VSWING and VOH must meet the V_PP and V_CMR input require-
ments. Figures 5A to 5E show interface examples for the
HiPerClockS IN/nIN input with built-in 50Ω terminations driven
dor, use their termination recommendation. Please consult with
the vendor of the driver component to confirm the driver termi-
nation requirements.
3. 3V
3. 3V
LVDS
Zo = 50 Ohm
Zo = 50 Ohm
IN
VT
nIN
R e c e ive r
With
Built-In
50 Ohm
FIGURE 5A. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50Ω DRIVEN BY AN LVDS DRIVER
3. 3V
3. 3V
LVPECL
Zo = 50 Ohm
Zo = 50 Ohm
IN
VT
nIN
R1
50
R e c e ive r
With
Built-In
50 Ohm
FIGURE 5B. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50Ω DRIVEN BY AN LVPECL DRIVER
3. 3V
3.3V
Zo = 50 Ohm
Zo = 50 Ohm
CML- Open Collector
IN
VT
nIN
R ec e ive r
With
Built-In
50 Ohm
FIGURE 5C. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50Ω DRIVEN BY A CML DRIVER
WITH OPEN COLLECTOR
3. 3V
3. 3V
Zo = 50 Ohm
Zo = 50 Ohm
CML- Built-in 50 Ohm Pull-Up
IN
VT
nIN
R e c e ive r
With
Built-In
50 Ohm
FIGURE 5D. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50Ω DRIVEN BY A CML DRIVER
WITH BUILT-IN 50Ω PULLUP
3. 3V
3.3V
R1 25 Zo = 50 Ohm
Zo = 50 Ohm
SSTL R2 25
IN
VT
nI N
R e ce i ve r
With
Built-In
50 Ohm
FIGURE 5E. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50Ω DRIVEN BY AN SSTL DRIVER
889874AK
www.icst.com/products/hiperclocks.html
10
REV. A MAY 19, 2004