Datasheet

DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
87 of 124
Figure 15-6. Protected Interface Example for the DS21554
COMPONENT FUNCTION
D1 TO D4 SCHOTTKY DIODE, INTERNATIONAL RECTIFIER 11DQ04
C1
0.1mF CERAMIC CAPACITOR IN PARALLEL WITH 10mF TANTALUM
CAPACITOR
C2
0.47mF, NONPOLARIZED CERAMIC CONSTRUCTION
S SEMTECH LC01-6, 6V LOW CAPACITANCE TVS
FUSE
RT
RTERM
R1 TO R4
X1
X2
FOR MORE INFORMATION ON THE SELECTION OF THESE
COMPONENTS, REFER TO THE SEPARATE APPLICATION NOTES
ON SECONDARY OVERVOLTAGE PROTECTION AND T1/E1
NETWORK INTERFACE DESIGN AVAILABLE ON OUR WEBSITE AT
WWW.MAXIM-IC.COM/APPNOTEINDEX.
RTIP
RRING
TTIP
TRING
Receive
Line
DS21554
S
C1
D1
D2
D3 D4
1:1
Fuse
Fuse
Transmit
Line
Fuse
Fuse
0.1
N:1
470
470
C2
R1
R2
R3
R4
Rt
Rt
Rterm Rterm
X1
X2
+5V
2.048MHz
MCLK
DVDD
DVSS
0.1
RVDD
RVSS
0.1
TVDD
TVSS
0.1
+5.0V
0.01
68
+
10
+
NOTE 1: ALL CAPACITOR VALUES ARE IN mF.
NOTE 2: THE 10mF CAPACITOR ON TVDD IS OF TANTALUM CONSTRUCTION.
NOTE 3: THE 68mF CAPACITOR IS REQUIRED TO MAINTAIN V
DD
DURING A TRANSIENT EVENT.