DS2148T+ Maxim Integrated Products, DS2148T+ Datasheet - Page 20

• Manufacturer Part Number: DS2148T+
• Description: IC LIU E1/T1/J1 5V 44-TQFP
• Manufacturer: Maxim Integrated Products
• Type: Line Interface Units (LIUs)r

Specifications of DS2148T+

• Number Of Drivers/receivers: 1/1
• Protocol: T1/E1/J1
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 2-8. Loopback Control in Hardware Mode
Table 2-9. Transmit Data Control in Hardware Mode
Table 2-10. Receive Sensitivity Settings
Table 2-11. Monitor Gain Settings
Table 2-12. Internal Rx Termination Select
Table 2-13. MCLK Selection
Remote Loopback
Local Loopback
Analog Loopback
No Loopback
Transmit Unframed All Ones
Transmit Alternating Ones and Zeros
Transmit PRBS
TPOS and TNEG
(CCR5.5)
(CCR5.1)
2.048MHz
2.048MHz
1.544MHz
MCLK
MM1
LOOPBACK
RT1
0
0
1
1
0
0
1
1
(CCR4.4)
TRANSMIT DATA
EGL
0
1
1
0
(CCR5.4)
(CCR5.0)
(CCR1.3)
MM0
JAMUX
RT0
0
1
0
1
0
1
0
1
0
1
0
SYMBOL
ALB
RLB
LLB
Internal receive-side termination disabled
Internal receive-side 120Ω enabled
Internal receive-side 100Ω enabled
Internal receive-side 75Ω enabled
–
Normal operation (no boost)
TERMINATION CONFIGURATION
INTERNAL LINEAR
GAIN BOOST (dB)
(CCR1.7)
(CCR1.7)
0 (E1)
0 (E1)
1 (T1)
1 (T1)
ETS
ETS
INTERNAL RECEIVE
0
1
1
SYMBOL
TPRBSE
CONTROL BIT
TAOZ
TUA1
20
26
32
–
CCR6.6
CCR6.7
CCR6.4
20 of 73
–
CONTROL
-12dB (short haul)
-43dB (long haul)
-30dB (limited long haul)
-36dB (long haul)
CCR3.7
CCR3.5
CCR3.4
RECEIVE SENSITIVITY
BIT
–
LOOP1
1
1
0
0
TX1
1
1
0
0
LOOP0
1
0
1
0
TX0
1
0
1
0