DS21448LDK Maxim Integrated Products, DS21448LDK Datasheet - Page 37
DS21448LDK
Manufacturer Part Number
DS21448LDK
Description
KIT DESIGN LIU DS21448L T1/J1/E1
Manufacturer
Maxim Integrated Products
Datasheet
1.DS21448L.pdf
(60 pages)
Specifications of DS21448LDK
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
- Current page: 37 of 60
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TRANSMIT
LINE
Figure 7-2. Protected Interface Using Internal Receive Termination
RECEIVE
LINE
NOTE 1: ALL RESISTOR VALUES ARE ±1%.
NOTE 2: S IS A SIDACTOR.
NOTE 3: THE FUSES ARE OPTIONAL TO PREVENT AC POWER LINE CROSSES FROM COMPROMISING THE TRANSFORMERS.
NOTE 4: THE R
NOTE 5: THE 68µF IS USED TO KEEP THE LOCAL POWER PLANE POTENTIAL WITHIN TOLERANCE DURING A SURGE.
NOTE 6: REFER TO APPLICATION NOTE 324 FOR SIDACTOR AND FUSE DETAILS.
FUSE
FUSE
FUSE
FUSE
FOR T1 APPLICATIONS.
T
RESISTORS ARE USED TO INCREASE THE TRANSMITTER RETURN LOSS
S
S
(LARGER WINDING TOWARD
S
S
S
S
THE NETWORK)
2:1
1:1
S
S
60
R
R
t
t
(NONPOLARIZED)
0.1µF
60
1.0µF
37 of 60
TTIP
RTIP
TRING
RRING
Semiconductor
DS21448
Dallas
DS21448 3.3V T1/E1/J1 Quad Line Interface
(Table
MCLK
V
V
V
V
DD
SS
DD
SS
7-A). NO RETURN LOSS IS REQUIRED
0.01µF
(THIS CAN ALSO BE 1.544MHz
FOR T1 ONLY OPERATION)
0.1µF
0.1µF
2.048MHz
0.01µF
V
10µF
DD
+
68µF
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