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参数资料
| 型号： | W671340P |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | 模拟传输电路 |
| 英文描述： | TELECOM-SLIC, PQCC28 |
| 封装： | PLASTIC, LCC-28 |
| 文件页数： | 28/48页 |
| 文件大小： | 1344K |
| 代理商： | W671340P |
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W671300 SERIES
RELAY
SW+
SW-
SWC
+3.3V
FIGURE 15: EXTERNAL RELAY SWITCHING
Since the device provides the ringing waveform, the relay functions which may be supported include
subscriber disconnect, test access or line interface bypass. An external snubber diode is not required
when using the uncommitted switch as a relay driver.
7.4.2. Test Load
The switch may be used to connect test loads across Tip and Ring. The test loads can provide
external test termination for the device. Proper connection of the uncommitted switch to Tip and Ring
is shown below.
RING
TIP
TEST
LOAD
SW+
SW-
SWC
FIGURE 16: TEST LOAD SWITCHING
The diode in series with the test load blocks current from flowing through the uncommitted switch
when the polarity of the Tip and Ring terminals are reversed. In addition to the Reverse Active mode,
the polarity of Tip and Ring are reversed for half of the ringing cycle. With independent logic control
and the blocking diode, the uncommitted switch may be continuously connected to the Tip and Ring
terminals.
8. TIMING DIAGRAMS
As the W671300 family is a completely analog technology there are no timing diagrams.
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