ICS858020 Datasheet, PDF (8/14 Pages) Integrated Device Technology – LOW SKEW, 1-TO-4 DIFFERENTIAL-TO-CML FANOUT BUFFER

ICS858020
LOW SKEW, 1-TO-4
DIFFERENTIAL-TO-CML FANOUT BUFFER
LVPECL INPUT WITH BUILT-IN 50Ω TERMINATION INTERFACE (3.3V)
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
Both VSWING and VOH must meet the V_IH and V_IL input require-
ments. Figures 2A to 2D show interface examples for the
HiPerClockS IN/nIN input with built-in 50Ω terminations driven
vendor, use the termination they recommend. Please consult
with the vendor of the driver component to confirm the driver
termination 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 2A. 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 2B. 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 2C. 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 2D. 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 2E. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50Ω DRIVEN BY AN SSTL DRIVER
858020AK
8
REV. A DECEMBER 10, 2007