DS21448L+ Maxim Integrated Products, DS21448L+ Datasheet - Page 22

• Manufacturer Part Number: DS21448L+
• Description: IC LIU QUAD E1/T1/J1 128-LQFP
• Manufacturer: Maxim Integrated Products
• Type: Line Interface Units (LIUs)r

Specifications of DS21448L+

• Number Of Drivers/receivers: 4/4
• Protocol: T1/E1/J1
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Package / Case: 128-TQFP, 128-VQFP
• Product: Framer
• Number Of Transceivers: 4
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 400 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 4-I. Receive Sensitivity Settings
CCR5 (04H): Common Control Register 5
Table 4-J. Backplane Clock Select
Table 4-K. Monitor Gain Settings
Table 4-L. Internal Rx Termination Select
(CCR4.4)
(CCR5.7)
(CCR5.5)
(CCR5.1)
BPCS1
RSCLKE
TSCLKE
MM1
EGL
BPCS1
BPCS1
BPCS0
RT1
(MSB)
NAME
MM1
MM0
0
1
1
0
RT1
RT0
0
0
1
1
0
0
1
1
0
0
1
1
(CCR5.6)
(CCR5.4)
(CCR5.0)
(CCR1.7)
BPCS0
MM0
0 (E1)
0 (E1)
1 (T1)
1 (T1)
RT0
ETS
POSITION
0
1
0
1
0
1
0
1
0
1
0
1
BPCS0
CCR5.7
CCR5.6
CCR5.5
CCR5.4
CCR5.3
CCR5.2
CCR5.1
CCR5.0
BPCLK FREQUENCY (MHz)
Normal operation (no boost)
Internal receive-side termination disabled
INTERNAL LINEAR GAIN
RECEIVE SENSITIVITY
-30 (limited long haul)
TERMINATION CONFIGURATION
Internal receive-side 120Ω enabled
Internal receive-side 100Ω enabled
Internal receive-side 75Ω enabled
Backplane Clock Frequency Select 1. See
Backplane Clock Frequency Select 0. See
Monitor Mode Gain Select 1
Monitor Mode Gain Select 0. See
Receive Synchronization Clock Enable
0 = disable 2.048MHz synchronization receive mode
1 = enable 2.048MHz synchronization receive mode
Transmit Synchronization Clock Enable
0 = disable 2.048MHz transmit synchronization clock
1 = enable 2.048MHz transmit synchronization clock
Receive Termination Select 1. See
Receive Termination Select 0. See
-12 (short haul)
-43 (long haul)
-36 (long haul)
BOOST (dB)
MM1
INTERNAL RECEIVE
16.384
(dB)
8.192
4.096
2.048
20
26
32
MM0
22 of 60
(Table 4-K.
(Table 4-K.
RSCLKE
Table 4-L
Table 4-L
)
FUNCTION
Table 4-J
Table 4-J
for details.
for details.
TSCLKE
for details.
for details.
RT1
(LSB)
RT0