參數(shù)資料
型號(hào)： W671510P
廠商： WINBOND ELECTRONICS CORP
元件分類： 模擬傳輸電路
英文描述： TELECOM-SLIC, PQCC28
封裝： PLASTIC, LCC-28
文件頁(yè)數(shù)： 19/42頁(yè)
文件大小： 1230K
代理商： W671510P
W671500 SERIES
capacitors are rated at 100V. For applications driven by low cost and small size, the decoupling
scheme shown below could be implemented.
VBH
VBL
0.22
W6715xx
FIGURE 12: ALTERNATE DECOUPLING SCHEME
It is important to place the external diode between the VBH pin and the decoupling capacitor.
Attaching the decoupling capacitor directly to the VBH pin will degrade the reliability of the device.
This applies to both single and stacked and decoupling arrangements.
If VBL and VBH are tied together to override the battery switch function, then the external diode is not
needed and the decoupling may be attached directly to VBH.
7.4. UNCOMMITTED SWITCH
The uncommitted switch is a three terminal device designed for system flexibility. The Switch Control
logic input, SWC , allows switch operation regardless of device operating mode. The switch is
activated by a logic LOW. The positive and negative terminals of the switch are labeled SW+ and SW-
respectively.
7.4.1. Relay Driver
The uncommitted switch may be used as a relay driver by connecting SW+ to the relay coil and SW-
to ground. The switch is designed to have a maximum on voltage of 0.6V with a load current of 45mA.
RELAY
SW+
SW-
SWC
+5V
FIGURE 13: 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.
- 26 -
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