ICS889874 Datasheet, PDF (9/14 Pages) Integrated Circuit Systems – DIFFERENTIAL-TO-LVPECL BUFFER/DIVIDER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS889874
1:2
DIFFERENTIAL-TO-LVPECL BUFFER/DIVIDER
2.5V 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
requirements.Figures 4A to 4D 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 or 2.5V
2. 5V
LVDS
Zo = 50 Ohm
Zo = 50 Ohm
IN
VT
nIN
R e c e ive r
With
Built-In
50 Ohm
FIGURE 4A. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50Ω DRIVEN BY AN LVDS DRIVER
2.5V
Zo = 50 Ohm
Zo = 50 Ohm
2.5V LVPECL
2. 5V
IN
VT
nI N
R1
18
R e ce i ve r
With
Built-In
50 Ohm
FIGURE 4B. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50Ω DRIVEN BY AN LVPECL DRIVER
2.5V
2.5V
2.5V
2.5V
Zo = 50 Ohm
Zo = 50 Ohm
CML - Open Collector
IN
VT
nIN
R e ce i ve r
With
Built-In
50 Ohm
Zo = 50 Ohm
Zo = 50 Ohm
CML - Built-in 50 Ohm Pull-up
IN
VT
nIN
R e ce i ve r
With
Built-In
50 Ohm
FIGURE 4C. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50Ω DRIVEN BY AN OPEN COLLECTOR
CML DRIVER
FIGURE 4D. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50Ω DRIVEN BY A CML DRIVER
WITH BUILT-IN 50Ω PULLUP
2.5V
R1
R2
SSTL
25
Zo = 50 Ohm
Zo = 50 Ohm
25
2.5V
IN
VT
nIN
Receiver With Built-In 50Ω
FIGURE 4E. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50Ω DRIVEN BY AN SSTL DRIVER
889874AK
www.icst.com/products/hiperclocks.html
9
REV. A MAY 19, 2004