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DS2148G Datasheet(PDF) 20 Page - Maxim Integrated Products

Part # DS2148G
Description  5V E1/T1/J1 Line Interface Unit
PDF  73 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

DS2148G Datasheet(HTML) 20 Page - Maxim Integrated Products

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DS2148/DS21Q48
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Table 2-8. Loopback Control in Hardware Mode
LOOPBACK
SYMBOL
CONTROL BIT
LOOP1
LOOP0
Remote Loopback
RLB
CCR6.6
1
1
Local Loopback
LLB
CCR6.7
1
0
Analog Loopback
ALB
CCR6.4
0
1
No Loopback
–
–
0
0
Table 2-9. Transmit Data Control in Hardware Mode
TRANSMIT DATA
SYMBOL
CONTROL
BIT
TX1
TX0
Transmit Unframed All Ones
TUA1
CCR3.7
1
1
Transmit Alternating Ones and Zeros
TAOZ
CCR3.5
1
0
Transmit PRBS
TPRBSE
CCR3.4
0
1
TPOS and TNEG
–
–
0
0
Table 2-10. Receive Sensitivity Settings
EGL
(CCR4.4)
ETS
(CCR1.7)
RECEIVE SENSITIVITY
0
0 (E1)
-12dB (short haul)
1
0 (E1)
-43dB (long haul)
1
1 (T1)
-30dB (limited long haul)
0
1 (T1)
-36dB (long haul)
Table 2-11. Monitor Gain Settings
MM1
(CCR5.5)
MM0
(CCR5.4)
INTERNAL LINEAR
GAIN BOOST (dB)
0
0
Normal operation (no boost)
0
1
20
1
0
26
1
1
32
Table 2-12. Internal Rx Termination Select
RT1
(CCR5.1)
RT0
(CCR5.0)
INTERNAL RECEIVE
TERMINATION CONFIGURATION
0
0
Internal receive-side termination disabled
0
1
Internal receive-side 120
Ω enabled
1
0
Internal receive-side 100
Ω enabled
1
1
Internal receive-side 75
Ω enabled
Table 2-13. MCLK Selection
MCLK
JAMUX
(CCR1.3)
ETS
(CCR1.7)
2.048MHz
0
0
2.048MHz
1
1
1.544MHz
0
1



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