HC5523 Datasheet, PDF(18/18 Page) Intersil Corporation – LSSGR/TR57 CO/Loop Carrier SLIC with Low Power Standby

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HC5523 Datasheet, PDF (18/18 Pages) Intersil Corporation – LSSGR/TR57 CO/Loop Carrier SLIC with Low Power Standby

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Application Circuit

HC5523

RRT

CRT

PTC

TIP

PTC

RING

RINGING

(VBAT + 90VRMS)

VBAT

RF1

NOTE 31

RF2 Surgector

+5V

RELAY

12V

CHP (NOTE 32)

-5V

21 HPT

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

RRX

RDC1

RDC2

CDC

RFB

CODEC/FILTER

U1 SLIC (Subscriber Line Interface Circuit)

HC5526

U2 Combination CODEC/Filter e.g.

CD22354A or Programmable CODEC/

Filter, e.g. SLAC

CDC 1.5ÂµF, 20%, 10V

CHP 10nF, 20%, 100V (Note 2)

CRT 0.39ÂµF, 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

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