Datasheet

DS21Q59 Quad E1 Transceiver
49 of 76
Figure 21-2. External Analog Connections (Protected Interface)
RTIP1
RRING1
TTIP1
TRING1
1/4 DS21Q59
0.47mF
(NONPOLARIZED
)
DVDD
DVSS
0.1
m
F
RVDD
RVSS
0.1
m
F
+VDD
0.01mF
2.048MHz
MCLK
S
1:1
0.1mF
FUSE
FUSE
60 60
+VDD
C2
D5
D6
D7
D8
68
m
F
S
TRANSMI
T
LINE
FUSE
FUSE
0.1
m
F
+VDD
C1
D1
D2
D3
D4
TVDD
TVSS
2:1
RECEIVE
LINE
Note 1: All resistor values are ±1%.
Note 2: C1 = C2 = 0.1mF.
Note 3: S is a 6V transient suppressor.
Note 4: D1 to D8 are Schottky diodes.
Note 5: The fuses are optional to prevent AC power line crosses from compromising the transformers.
Note 6: The 68mF is used to keep the local power plane potential within tolerance during a surge.