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DS42MB200TSQ Datasheet(PDF) 10 Page - Texas Instruments

No. de Pieza. DS42MB200TSQ
Descripción  DS42MB200 Dual 4.25 Gbps 2:1/1:2 CML Mux/Buffer with Transmit Pre-Emphasis and Receive Equalization
Descarga  17 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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DS42MB200TSQ Datasheet(HTML) 10 Page - Texas Instruments

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OUT+
OUT-
IN+
IN-
DS42MB200
R
D
EQ
M
U
X
25-inch FR4
board trace
Pattern
Generator, 4 Gb/s
D+
D-
2 -1 pattern
7
PE=0dB
40-inch
FR4 trace
50 ps/DIV
Data eye after 25-inch FR4 trace
50 ps/DIV
50 ps/DIV
Data eye after DS42MB200
50 ps/DIV
Data eye from pattern generator
50
50
VCC
5k
3.9k
IN +
EQ
180 pF
IN -
1.5V
DS42MB200
SNOSAT8G – JANUARY 2006 – REVISED APRIL 2013
www.ti.com
Figure 7. Receiver Input Termination and Biasing Circuit
APPLICATIONS INFORMATION
The DS42MB200 input equalizer provides equalization to compensate about 5 dB of transmission loss from a
short backplane transmission line. For characterization purposes, a 25-inch FR4 coupled micro-strip board trace
is used in place of the short backplane link. The 25-inch microstrip board trace has approximately 5 dB of
attenuation between 375 MHz and 1.875 GHz, representing closely the transmission loss of the short backplane
transmission line. The 25-inch microstrip is connected between the pattern generator and the differential inputs of
the DS42MB200 for AC measurements.
Finished Trace
Separation between
Dielectric Constant
Trace Length
Dielectric Height H
Loss Tangent
Width W
Traces
εR
25 inches
8.5 mil
11.5 mil
6 mil
3.8
0.022
Figure 8. Data input and output eye patterns with driver set to 0 dB pre-emphasis
10
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Copyright © 2006–2013, Texas Instruments Incorporated
Product Folder Links: DS42MB200


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