DS21348G+ Maxim Integrated Products, DS21348G+ Datasheet - Page 52
DS21348G+
Manufacturer Part Number
DS21348G+
Description
IC LIU T1/E1/J1 3.3V 49-BGA
Manufacturer
Maxim Integrated Products
Type
Line Interface Units (LIUs)r
Datasheet
1.DS21348G.pdf
(76 pages)
Specifications of DS21348G+
Number Of Drivers/receivers
1/1
Protocol
T1/E1/J1
Voltage - Supply
3.135 V ~ 3.465 V
Mounting Type
Surface Mount
Package / Case
49-CSBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Figure 7-1. Basic Interface
NOTES:
1) All resistor values are ±1%.
2) In E1 applications, the Rt resistors are used to increase the transmitter return loss
3) The Rr resistors should be set to 60Ω each if the internal receive-side termination feature is enabled.
4) See
Transmit
return loss is required for T1 applications.
When this feature is disabled, Rr = 37.5Ω for 75Ω or 60Ω for 120Ω E1 systems, or 50Ω for 100Ω
T1 lines.
Receive
Line
Line
Table 7-1
and
toward the network)
Table 7-2
(larger winding
N:1
1:1
0.1µF
Rr
for the appropriate transmit transformer turns ratio (N).
Rt
Rt
Rr
polarized)
1.0µF
(non-
52 of 76
TTIP
TRING
RTIP
RRING
DS21348
VDD (21)
VSS (22)
VDD (36)
VSS (35)
MCLK
0.01µF
0.1µF
0.1µF
2.048MHz
(this clock can also
be 1.544MHz for T1
only applications)
10µF
10µF
(Table
+VDD
7-1). No
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