ICS854S14I Datasheet, PDF (8/14 Pages) Integrated Device Technology – LOW SKEW, 1-TO-4 DIFFERENTIAL-TOLVDS FANOUT BUFFER

ICS854S14I
LOW SKEW, 1-TO-4 DIFFERENTIAL-TO-LVDS FANOUT BUFFER
APPLICATION INFORMATION
PRELIMINARY
LVPECL INPUT WITH BUILT-IN 50Ω TERMINATIONS INTERFACE
The IN /nIN with built-in 50Ω terminations accepts LVDS, common driver types. The input interfaces suggested here are
LVPECL, LVHSTL, CML, SSTL and other differential signals.
The signal must meet the V and V input requirements.
PP
CMR
Figures 2A to 2F show interface examples for the HiPerClockS
IN/nIN input with built-in 50Ω terminations driven by the most
examples only. If the driver is from another vendor, use their
termination recommendation. Please consult with the vendor
of the driver component to confirm the driver termination
requirements.
3.3V or 2.5V
2.5V
2.5V
2. 5V
LVDS
Zo = 50 Ohm
Zo = 50 Ohm
IN
VT
nIN
R e ce i ve r
With
Built-In
50 Ohm
Zo = 50 Ohm
Zo = 50 Ohm
2.5V LVPECL
IN
VT
nIN
R1
18
R e ce i ve r
With
Built-In
50 Ohm
FIGURE 2A. HIPERCLOCKS IN/nIN INPUT WITH BUILT-IN 50Ω
DRIVEN BY AN LVDS DRIVER
FIGURE 2B. HIPERCLOCKS IN/nIN INPUT WITH BUILT-IN 50Ω
DRIVEN BY AN LVPECL DRIVER
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
FIGURE 2C. HIPERCLOCKS IN/nIN INPUT WITH BUILT-IN 50Ω
DRIVEN BY AN OPEN COLLECTOR CML DRIVER
3.3V
3.3V LVPECL
Zo = 50 Ohm C1
Zo = 50 Ohm C2
R5
100 - 200 Ohm
R5
100 - 200 Ohm
2.5V
IN
50 Ohm
VT
50 Ohm
nIN
REF_AC
Receiver with Built-In 50Ω
FIGURE 2E. HIPERCLOCKS IN/nIN INPUT WITH BUILT-IN 50Ω
DRIVEN BY A 3.3V LVPECL DRIVER
2.5V
2.5V
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 2D. HIPERCLOCKS IN/nIN INPUT WITH BUILT-IN 50Ω
DRIVEN BY A CML DRIVER WITH
BUILT-IN 50Ω PULLUP
3.3V
3.3V CML with
Built-In Pullup
Zo = 50 Ohm C1
Zo = 50 Ohm C2
2.5V
IN
50 Ohm
VT
50 Ohm
nIN
REF_AC
Receiver with Built-In 50Ω
FIGURE 2F. HIPERCLOCKS IN/nIN INPUT WITH BUILT-IN 50Ω
DRIVEN BY A 3.3V CML DRIVER WITH
BUILT-IN PULLUP
IDT^™ / ICS^™ LVDS FANOUT BUFFER
8
ICS854S14AKI REV. A FEBRUARY 23, 2007