HC5520
Typical Application Circuit Diagram
R
X
R
BH
0.47µF
R
R
100KΩ
V
RX
237KΩ
BH
X
CVRX
R
BAL
R
BL
R
237KΩ
BL
T
100KΩ
X4W
C
VTX
R
4W
R
V
TPS
T
X
TX
0.47µF
100KΩ
TIPSEN
TIP
TIP
R
50Ω
N
R
R
N
6.49KΩ
PT
TEST
ACCESS
RELAY
RING
RELAY
SURGECTOR
R
KZO
R
PR
K
15.4KΩ
ZO
50Ω
RING
R
CP
C
P
RING
C
200Ω
P
100KΩ
RINGSEN
1µF
-5V
R
R
C
RGS
DC
PST
C
DC
4.7µF
HC5520
910Ω
R
910
PSG
TO RING
GENERATOR
C
RTD
R
PST
C
RTD
R
R
PSR
PSB
1µF
910Ω
R
PSR
+5V
R
2.15KΩ
DC
RELAY
RELAY
RELAY
TA
TB
R
DC
SHDO
TSDO
RD
+5V
+5V
RGND
0.1µF
0.1µF
V
CC
AGND
TAI
TBI
RCI
PDI
PRI
±5V GND
0.1µF
-5V
V
EE
BATTERY GND
BGND
0.1µF
-48V
V
BAT
EARTH GROUND
GROUND PLANE
NOTE: The HC5520 application circuit is configured to provide a receive gain of 0dB, a transmit gain of 0dB, and a synthesized 2W imped-
ance of 593Ω. Note, the value of R
, R
should always be selected to be 100kΩ.
TPS
RGS
17
HARRIS [ HARRIS CORPORATION ]
