DS21448L+ Maxim Integrated Products, DS21448L+ Datasheet - Page 35

• 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 7-C. Line Build-Out Select for E1 in Register CCR4 (ETS = 0) Using Alternate
Transformer Configuration
Note: See
Table 7-D. Transformer Specifications (3.3V Operation)
Turns Ratio
Primary Inductance
Leakage Inductance
Interwinding Capacitance
TRANSMIT TRANSFORMER DC RESISTANCE
Primary (Device Side)
Secondary
RECEIVE TRANSFORMER DC RESISTANCE
Primary (Device Side)
Secondary
L2
0
0
1
1
L1
0
0
0
0
Figure
L0
7-4.
0
1
0
1
SPECIFICATION
120Ω with high return loss
75Ω with high return loss
APPLICATION
120Ω normal
75Ω normal
1:1 (receive) and 1:2 (transmit) ±2%
600µH (min)
1.0µH (max)
40pF (max)
1.0Ω (max)
1.5Ω (max)
1.2Ω (max)
1.2Ω (max)
35 of 60
0.8:1:1CT
0.8:1:1CT
0.8:1:1CT
0.8:1:1CT
N
RECOMMENDED VALUE
RETURN LOSS
21dB
21dB
N.M.
N.M.
R
11.6
11.6
t
0
0
(Ω)