DS2196 Dallas Semiconducotr, DS2196 Datasheet - Page 121

• Manufacturer Part Number: DS2196
• Description: T1 Dual Framer LIU
• Manufacturer: Dallas Semiconducotr

Figure 19-1: EXTERNAL ANALOG CONNECTIONS
NOTES:
1. Resistor values are 1%.
2. Circuit requires use of Schottky diodes for D1-D4.
3. S is a 6V transient suppresser.
4. C1 is 0.1 uF.
5. The Rp resistors are used to prevent the fuses from opening during a surge.
6. See the Separate Application Note for details on how to construct a protected interface.
7. MCLK requires a TTL level 1.544 MHz clock (+50 ppm) for proper device operation.
T1 Receive
T1 Receive
T1 Transmit
Line
Line
Line
Fuse
Fuse
Fuse
Fuse
Fuse
Fuse
Rp
Rp
Rp
Rp
Rp
Rp
100
(larger winding toward
the network)
2:1
1:1
1:1
Alternate Receive Interface
0.1uF
0.1uF
50
polarized)
S
(non-
1uF
50
470
470
D3
D1
470
470
C1
121 of 157
+3.3V
D2
D4
TTIP
TRING
RTIP
RRING
RTIP
RRING
DS2196
MCLK
DVDD
RVDD
DVSS
TVDD
RVSS
TVSS
0.01uF
0.1uF
0.1uF
1.544MHz
10 uF
0.1uF
Tant
+3.3V