SK4429
Anything to PECL
HIGH-PERFORMANCE PRODUCTS
Description
ꢀeatures
•
•
•
•
Quad Buffer/Receiver
3 GHz Fmax
Anything to PECL Translation
Available in 32 lead, 5mm X5mm, TQFP
Package
The SK4429 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.
The SK4429 uses 50Ω outputs with sink/source
capability, and is optimized for applications that require:
• Point to point, double terminated, timing
critical lines
Application Notes
• Point to point, series terminated, timing
critical lines
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
IN0*
OUT0*
D
Q
0
D* Q*
Input Options
Output Options
IN1
1
0
Open
50Ω Source / Sink
OUT1
OUT1*
IN1*
VCC
D
Q
Q*
D*
IN
<
0 - 3
>
>
50Ω
50Ω
IN2
1
0
OUT
OUT
OUT2
IN2*
*
OUT2*
IN<
0 - 3
*
Q
D
10 mA
10 mA
Q*
D*
VEE
VEE
IN3
1
0
OUT3
IN3*
OUT3*
D
Q
Q*
D*
Pin Description
CLK
CLK*
SEL*
SEL
EN
EN*
V
CC
V
CC
OUT1*
OUT1
SEL
SEL*
Package Information
V
EE
EE
CLK*
CLK
V
OUT2
EN
OUT2*
EN*
32 pin, 5 mm X 5 mm
V
CC
V
CC
TQFP Package
Revision 1/July 10, 2002
www.semtech.com
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SEMTECH [ SEMTECH CORPORATION ]
