Datasheet

DS21352/DS21552
91 of 137
Figure 16-6 PROTECTED INTERFACE EXAMPLE FOR THE DS21552
Note:
The 68uf cap is required to maintain VDD during a transient event.
COMPONET DESCRIPTION
D1 – D4 Schottky Diode, International Rectifier 11DQ04
C1 0.1uf ceramic in parallel with 10uf tantalum
C2 .47 uf, non polarized ceramic construction
S Semtech LC01-6, 6V low capacitance TVS
Fuse
Rt
Rterm
R1, R2, R3, R4
X1
X2
For more information on the selection of these components see the separate
application notes on Secondary Over Voltage Protection and T1 Network
Interface Design Criteria. These applications notes are available from Dallas
Semiconductor’s Web site at www.dalsemi.com
RTIP
RRING
TTIP
TRING
Receive
Line
DS21552
1.544MHz
MCLK
+VDD
S
C1
D1
D2
D3 D4
1:1
Fuse
Fuse
Transmit
Line
Fuse
Fuse
0.1uF
N:1
470
470
DVDD
DVSS
0.1uF
RVDD
RVSS
0.1uF
TVDD
TVSS
0.1uF
+5V
0.01uF
68uf
C2
R1
R2
R3
R4
Rt
Rt
Rterm Rterm
X1
X2
+