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DS42MB100 fiches techniques PDF

National Semiconductor - 4.25 Gbps 2:1/1:2 CML Mux/Buffer

Numéro de référence DS42MB100
Description 4.25 Gbps 2:1/1:2 CML Mux/Buffer
Fabricant National Semiconductor 
Logo National Semiconductor 





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DS42MB100 fiche technique
December 7, 2007
DS42MB100
4.25 Gbps 2:1/1:2 CML Mux/Buffer with Transmit De-
Emphasis and Receive Equalization
General Description
The DS42MB100 is a signal conditioning 2:1 multiplexer and
1:2 fan-out buffer designed for use in backplane redundancy
or cable driving applications. Signal conditioning features in-
clude input equalization and programmable output de-em-
phasis that enable data communication in FR4 backplane up
to 4.25 Gbps. Each input stage has a fixed equalizer to reduce
ISI distortion from board traces.
All output drivers have four selectable levels of de-emphasis
to compensate for transmission losses from long FR4 back-
plane or cable attenuation reducing deterministic jitter. The
de-emphasis levels can be independently controlled for the
line-side and switch-side drivers. The internal loopback paths
from switch-side input to switch-side output enable at-speed
system testing. All receiver inputs and driver outputs are in-
ternally terminated with 100differential terminating resis-
tors.
Features
2:1 multiplexer and 1:2 buffer
0.25 – 4.25 Gbps fully differential data paths
Fixed input equalization
Programmable output de-emphasis
Independent de-emphasis controls
Programmable loopback modes
On-chip terminations
HBM ESD rating 5.5 kV on all pins
+3.3V supply
Lead-less LLP-36 package
-40°C to +85°C operating temperature range
Applications
Backplane driver or cable driver
Redundancy and signal conditioning applications
CPRI/OBSAI
Functional Block Diagram
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© 2007 National Semiconductor Corporation 202090
20209001
www.national.com

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