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Teilenummer | DS42MB100 |
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Beschreibung | 4.25 Gbps 2:1/1:2 CML Mux/Buffer | |
Hersteller | National Semiconductor | |
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Gesamt 16 Seiten 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 100Ω differential 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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20209001
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20209004
FIGURE 1. Driver De-Emphasis Differential Waveform (Showing All 4 De-Emphasis Steps)
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6 Page Application Information
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FIGURE 6. Application Diagram
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12 Page | ||
Seiten | Gesamt 16 Seiten | |
PDF Download | [ DS42MB100 Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
DS42MB100 | 4.25-Gbps 2:1/1:2 CML MUX/Buffer | Texas Instruments |
DS42MB100 | 4.25 Gbps 2:1/1:2 CML Mux/Buffer | National Semiconductor |
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