ICS8S89831I Datasheet, PDF (9/21 Pages) Integrated Device Technology – Output frequency

ICS8S89831I Data Sheet
DIFFERENTIAL LVPECL-TO-LVPECL/ECL FANOUT BUFFER
3.3V Differential Input with Built-In 50Ω Termination Interface
The IN /nIN with built-in 50Ω terminations accept LVDS, LVPECL,
LVHSTL, CML, SSTL and other differential signals. Both signals must
meet the V_IN and V_IH input requirements. Figures 2A to 2D show
interface examples for the IN/nIN input with built-in 50Ω terminations
driven by the most common driver types. The input interfaces
suggested here are 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
3.3V
Zo = 50Ω
IN
Zo = 50Ω
VT
nIN
LVDS
Figure 2A. IN/nIN Input with Built-In 50Ω
Driven by an LVDS Driver
Receiver
With
Built-In
50Ω
3.3V
3.3V
LVPECL
Zo = 50Ω
Zo = 50Ω
IN
VT
nIN
R1
50Ω
Receiver
With
Built-In
50Ω
Figure 2B. IN/nIN Input with Built-In 50Ω
Driven by an LVPECL Driver
3.3V
3.3V
Zo = 50Ω
Zo = 50Ω
CML – Open Collector
IN
VT
nIN
Receiver
With
Built-In
50Ω
Figure 2C. IN/nIN Input with Built-In 50Ω
Driven by a CML Driver with Open Collector
3.3V
3.3V
R1
25
Zo = 50Ω
IN
Zo = 50Ω
VT
nIN
SSTL ^R2
25
Figure 2D. IN/nIN Input with Built-In 50Ω
Driven by an SSTL Driver
Receiver
With
Built-In
50Ω
ICS8S89831AKI REVISION A APRIL 26, 2010
9
©2010 Integrated Device Technology, Inc.