DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
Figure 15-6. Protected Interface Example for the DS21554
+5V
D1
D2
+5.0V
DS21554
R1
R2
N:1
X1
Fuse
Fuse
Rt
Rt
TTIP
DVDD
DVSS
Transmit
Line
C2
0.01
0.1
0.1
S
C1
TRING
68
+
D3
D4
RVDD
RVSS
R3
R4
1:1
470
Fuse
Fuse
TVDD
TVSS
+
RTIP
0.1
10
Receive
Line
470
RRING
X2
Rterm
MCLK
2.048MHz
Rterm
0.1
NOTE 1: ALL CAPACITOR VALUES ARE IN ꢀF.
NOTE 2: THE 10ꢀF CAPACITOR ON TVDD IS OF TANTALUM CONSTRUCTION.
NOTE 3: THE 68ꢀF CAPACITOR IS REQUIRED TO MAINTAIN VDD DURING A TRANSIENT EVENT.
COMPONENT
FUNCTION
D1 TO D4
SCHOTTKY DIODE, INTERNATIONAL RECTIFIER 11DQ04
0.1ꢀF CERAMIC CAPACITOR IN PARALLEL WITH 10ꢀF TANTALUM
CAPACITOR
C1
C2
S
0.47ꢀF, NONPOLARIZED CERAMIC CONSTRUCTION
SEMTECH LC01-6, 6V LOW CAPACITANCE TVS
FUSE
RT
RTERM
R1 TO R4
X1
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.
X2
87 of 124
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
