HC5520 查看數據表（PDF） - Harris Semiconductor
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HC5520 Datasheet PDF : 20 Pages
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HC5520
>9kΩ
TIP
2.4kΩ
SW
RING
RTPS
100kΩ
50Ω
RPT
RPR
50Ω
100kΩ
RRGS
TIPSEN
TIP
RX
SHDO
HC5520
RING
TX
RINGSEN
TX4W
RX
CVRX
0.472µF
100kΩ
VRX
CVTX
0.47µF
VTX
100kΩ
R4W
FIGURE 6. SWITCH HOOK DETECTION TEST CIRCUIT
PARAMETER
On Hook Condition
Off Hook Detection
INPUT
SW = Left
SW = Right
MEASUREMENT
SHDO
SHDO
SPECIFICATIONS
SHDO = Hi
SHDO = Lo
RTPS
100kΩ
TIPSEN
RX
CVRX
0.47µF
TIP
50Ω
TIP
RX 100kΩ
VRX
RL
RPT
SHDO
HC5520
SW
RPR
RING
50Ω RING
TX
CVTX
0.47µF
VTX
100kΩ RINGSEN
TX4W 100kΩ
RRGS
R4W
ON
SW
OFF
SHDO
OFF-HOOK
OFF-HOOK
tPERIOD
tBREAK
tMAKE
ON-HOOK
OFF-HOOK
tMEAS
ON-HOOK
OFF-HOOK
FIGURE 7. DIAL PULSE DISTORTION TEST CIRCUIT AND WAVEFORMS
PARAMETER
Percent Break
Dial Pulse Distortion
INPUT
SW = On, Off, . . .
SW = On, Off, . . .
MEASUREMENT
tBREAK and tPERIOD
tBREAK and tPERIOD and tMEAS
SPECIFICATIONS
(tBREAK/tPERIOD) x 100%
Abs[(tBREAK - tMEAS)/tPERIOD] x 100%
10
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