SK4435
Anything to PECL Receiver
HIGH-PERFORMANCE PRODUCTS
Description
ꢀeatures
The SK4435 is an extremely fast, stable and accurate
low skew quad buffer or cable driver / receiver. It can
asychronously pass four distinct signals, or it can
resynchronize them to a common clock. In addition, all
four outputs may be asynchronously enabled or
disabled. All of the D flip-flops are triggered on the
rising edge of the CLK input. It is also capable of
receiving inputs of any technology or voltage level.
•
•
•
•
Quad Buffer/Receiver
3 GHz Fmax
Anything to PECL Translation
Available in 32 lead, 5mm X5mm, TQFP
Package
Application Notes
The SK4435 has 100Ω input termination resistors
across each of the four inputs to help reduce system AN1001 - EPIC Family Product Line
component count and increase integration.
AN1003 - Termination Techniques for ECL / LVECL
PECL / LVPECL Devices
AN1004 - Interfacing Between LVDS and ECL /
LVECL / PECL / LVPECL
The SK4435 uses standard open emitter ECL outputs
optimized for:
• Standard, general purpose applications
• Multiple destinations (daisy chain).
ꢀunctional Block Diagram
IN0
1
Input Options
Output Options
OUT0
IN0*
OUT0*
D
Q
0
Open Emitter
D* Q*
VCC
IN1
1
0
IN
<
0 - 3
>
>
OUT1
OUT1*
IN1*
100
D
Q
Q*
D*
IN<
0 - 3
*
OUT
IN2
OUT*
1
0
OUT2
IN2*
OUT2*
Q
D
Q*
D*
IN3
1
0
OUT3
IN3*
Pin Description
OUT3*
D
Q
Q*
D*
CLK
CLK*
SEL*
SEL
EN
EN*
VCC
V
CC
OUT1*
OUT1
SEL
SEL*
V
EE
EE
CLK*
CLK
V
OUT2
EN
Package Information
OUT2*
EN*
V
CC
V
CC
32 pin, 5 mm X 5 mm
TQFP Package
Revision 1/July 10, 2002
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SEMTECH [ SEMTECH CORPORATION ]
