SK4425
Anything to PECL
HIGH-PERFORMANCE PRODUCTS
Description
ꢀeatures
The SK4425 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.
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Quad Buffer / Receiver
3 GHz Fmax
Anything to PECL Translation
Available in 32 lead, 5mm X5mm, TQFP
Package
Application Notes
The SK4425 uses standard open emitter ECL outputs
optimized for:
• Standard, general purpose ECL
applications
• Multiple destinations (daisy chain).
AN1001 - EPIC Family Product Line
AN1003 - Termination Techniques for ECL / LVECL
PECL / LVPECL Devices
AN1004 - Interfacing Between LVDS and ECL /
LVECL / PECL / LVPECL
ꢀunctional Block Diagram
IN0
1
OUT0
Input Options
IN0*
OUT0*
Output Options
D
Q
0
D* Q*
Open
Open Emitter
IN1
1
0
OUT1
VCC
OUT1*
IN1*
D
Q
IN<0 - 3>
Q*
D*
IN2
1
0
OUT
IN<0 - 3>*
OUT2
IN2*
OUT2*
OUT*
Q
D
Q*
D*
IN3
1
0
OUT3
IN3*
Pin Description
OUT3*
D
Q
Q*
D*
CLK
CLK*
SEL*
SEL
EN
EN*
VCC
VCC
OUT1*
OUT1
SEL
SEL*
V
V
EE
EE
CLK*
CLK
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 ]
