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| HC5523_03 Datasheet, PDF (20/22 Pages) Intersil Corporation – LSSGR/TR57 CO/Loop Carrier SLIC with Low Power Standby | |||
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Application Circuit
HC5523
RRT
CRT
R1
R3
R4
R2
PTC
TIP
PTC
RING
RINGING
(VBAT + 90VRMS)
VBAT
RF1
D3
D1
NOTE 31
D4
D2
RF2 Surgector
K
A
G
D5
+5V
RELAY
OR
12V
D6
CHP (NOTE 32)
RD
-5V
21 HPT
U1
22 RD
23 DT
25 DR
27 TIPX
CTC
2 BGND
CRC
4 VCC
VBAT
28 RINGX
6 VBAT
RSG
5 RINGRLY
7 RSG
-5V
HPR 20
VTX 19
VEE 18
RSN 16
AGND 15
RDC 14
C1 13
C2 12
DET 11
EO 9
E1 8
RTX
-5V RT
RB
RRX
RDC1
RDC2
CDC
RFB
U2
+-
CODEC/FILTER
U1 SLIC (Subscriber Line Interface Circuit)
HC5526
U2 Combination CODEC/Filter e.g.
CD22354A or Programmable CODEC/
Filter, e.g. SLAC
CDC 1.5µF, 20%, 10V
CHP 10nF, 20%, 100V (Note 2)
CRT 0.39µF, 20%, 100V
CTC, CRC 2200pF, 20%, 100V
Relay Relay, 2C Contacts, 5V or 12V Coil
D1 - D5 IN4007 Diode
Surgector SGT27S10
PTC Polyswitch TR600-150
D6 Diode, 1N4454
RF1, RF2 Line Resistor, 20â¦, 1% Match, 2 W
Carbon column resistor or thick film on
ceramic
R1, R3 200kâ¦, 5%, 1/4W
R2 910kâ¦, 5%, 1/4W
R4 1.2Mâ¦, 5%, 1/4W
RB 18.7kâ¦,1%, 1/4W
RD 39kâ¦, 5%, 1/4W
RDC1, RDC2 41.2kâ¦, 5%, 1/4W
RFB 20.0kâ¦, 1%, 1/4W
RRX 280kâ¦, 1%, 1/4W
RT 562kâ¦, 1%, 1/4W
RTX 20kâ¦, 1%, 1/4W
RRT 150â¦, 5%, 2W
RSG VBAT = -28V, RSG = â
VBAT = -48V, RSG = 21.4kâ¦, 1/4W 5%
NOTES:
31. It is recommended that the anodes of D3 and D4 be shorted to ground through a battery referenced surgector (SGT27S10).
32. To meet the specified 25dB 2-wire return loss at 200Hz, CHP needs to be 20nF, 20%, 100V.
FIGURE 21. APPLICATION CIRCUIT
20
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