HC5520 查看數據表（PDF） - Harris Semiconductor
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HC5520 Datasheet PDF : 20 Pages
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HC5520
1600Ω
200Ω
20kΩ
SW
TIP
RING
RBL
1kΩ
RBAL
RBH
RTPS
100kΩ
50Ω
RPT
RPR
50Ω
100kΩ
RRGS
RBL
TIPSEN
TIP
RBH
RX
RX
CVRX
0.47µF
100kΩ
VRX
SHDO
HC5520
CRTD
RING
TX
RINGSEN
TX4W
RD
CRTD
1µF
-5V
CVTX
0.47µF
VTX
100kΩ
R4W
VBAT
VRINGING
FIGURE 8. RING TRIP DETECTION TEST CIRCUIT
PARAMETER
No Ring Trip Detection
Ring Trip Detection
INPUT
SW = Up
SW = Down
MEASUREMENT
SHDO
SHDO
SPECIFICATIONS
SHDO = Hi
SHDO = Lo
1800Ω
TIP
VT
VR
RING
RTPS
100kΩ
50Ω
RPT
RPR
50Ω
100kΩ
RRGS
POLARITY REVERSAL COMMAND
TIPSEN
TIP
RX
PRI
HC5520
RING
TX
RINGSEN
TX4W
RX
CVRX
0.47µF
100kΩ
VRX
100kΩ
R4W
CVTX
0.47µF
VTX
tREV
VT
90%
90%
VR
FIGURE 9. POLARITY REVERSAL TIME TEST CIRCUIT AND WAVEFORMS
PARAMETER
Polarity Reversal Time
INPUT
Reversal Command
MEASUREMENT
tREV
SPECIFICATIONS
tREV
11
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