Datasheet

DS21Q50
60 of 87
Figure 16-2. External Analog Connections (Basic Configuration)
Figure 16-3. External Analog Connections (Protected Interface)
RTIP
RRING
TTIP
TRING
E1 RECEIVE
LINE
E1 TRANSMIT
LINE
1/4 DS21Q50
0.47mF
(NONPOLARIZED)
DVDD
DVSS
0.1
m
F
RVDD
RVSS
0.1
m
F
TVDD
TVSS
0.1
m
F
+3.3V
Rr
0.1
m
F
0.01
m
F
2.048MHz
MCLK
1 : 1
2 : 1
Rr
RTIP1
RRING1
TTIP1
TRING1
RECEIVE
LINE
1/4 DS21Q50
0.47mF
(non
polarized)
DVDD
DVSS
0.1
m
F
RVDD
RVSS
0.1
m
F
+VDD
0.01
m
F
2.048MHz
MCLK
S
1:1
0.1mF
Fuse
Fuse
60 60
+VDD
C2
D5
D6
D7
D8
68
m
F
S
TRANSMIT
LINE
Fuse
Fuse
0.1
m
F
+VDD
C1
D1
D2
D3
D4
TVDD
TVSS
2:1
NOTE 1: ALL RESISTOR VALUES ARE ±1%.
NOTE 2: C1 = C2 = 0.1m.
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 68
m
F IS USED TO KEEP THE LOCAL POWER-PLANE POTENTIAL WITHIN TOLERANCE DURING A SURGE.