SK4404
Quad Buffer/Receiver
HIGH-PERFORMANCE PRODUCTS
Description
ꢀeatures
The SK4404 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.
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Quad Buffer/Driver
3 GHz Fmax
3.3V / 5.2V Compatible
Available in 32 lead, 5mm X5mm, TQFP
Package
•
•
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Application Notes
AN1001 - EPIC Family Product Line
AN1003 - Termination Techniques for ECL / LVECL
PECL / LVPECL Devices
AN1004 - Interfacing Between LVDS and ECL /
LVECL / PECL / LVPECL
The SK4404 uses 50Ω outputs with sink/source
capability, and is optimized for applications that require:
• Point to point, double terminated, timing
critical lines
• Point to point, series terminated, timing
critical lines
Input Options
ꢀunctional Block Diagram
Open
IN<0 - 3>
IN0
1
OUT0
IN0*
OUT0*
IN<0 - 3>*
D
Q
0
D* Q*
Output Options
IN1
1
0
OUT1
50Ω Source / Sink
OUT1*
IN1*
D
Q
Q*
D*
VCC
IN2
1
0
50Ω
50Ω
OUT2
IN2*
OUT
OUT
OUT2*
Q
D
Q*
D*
*
10 mA
10 mA
IN3
VEE
1
0
VEE
OUT3
IN3*
OUT3*
D
Q
Q*
D*
CLK
Pin Description
CLK*
SEL*
SEL
EN
EN*
VCC
VCC
OUT1*
OUT1
SEL
SEL*
Package Information
V
V
EE
EE
CLK*
CLK
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 ]
