| Figure 2 |
| Component |
Description |
Part no. |
Source |
| LC01-6 |
6V, bidirectional,
low-capacitance TVS diode |
LC01-6 |
Semtech |
| TVS |
5V, 600W TVS diode |
SMBJ5.0 |
Semtech |
| PTC |
4 to 7 ohms
positive-temperature-coefficient resistor |
TR600-160 |
Raychem |
| Z1, Z2 |
275V TVS thyristor |
|
|
| C1 |
68-µF capacitor |
|
|
| C2 |
1-µF capacitor |
|
|
| C3 |
0.1-µF capacitor |
|
|
| C4 |
0.47-µF capacitor |
|
|
| R1, R2 |
470 ohms, 1/4W, 2%
resistor |
|
|
| R3 |
100 ohms, 1/2W, 1%
resistor |
|
|
| D1 to D4 |
Schottky diode |
11DQ04 |
International
Rectifier |
Notes:
You may substitute thermal-fuse resistors
(ALFR-2-5.6-1, IRC Inc) for PTC devices.
You may add resistors to TTIP
and TRING to negate the
signal-attenuation effect of the
line-feed resistors.Interconnecting
transformers is optional to support
current looping in the T1/E1 loop. |
|
| The complete
outside-line-protection circuit meets common- and
differential-mode immunity requirements. (For
clarity, the figure does not show the receiver
equalization and transmitter line-build-out
components.) |
| Back |
|
