HC5523IP datasheet(18/18 Pages) INTERSIL

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Application Circuit

21 HPT

22 RD

23 DT

25 DR

27 TIPX

28 RINGX

2 BGND

4 VCC

5 RINGRLY

6 VBAT

7 RSG

HPR 20

VTX 19

VEE 18

RSN 16

AGND 15

RDC 14

C1 13

C2 12

DET 11

EO 9

E1 8

TIP

RING

VBAT

RRT

-5V

RF1

RF2

CRC

CTC

RINGING

(VBAT + 90VRMS)

VBAT

CHP (NOTE 32)

-5V

RTX

RDC1

CDC

RDC2

RFB

CODEC/FILTER

RRX

CRT

NOTE 31

-5V

RSG

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, 20Ω, 1% Match, 2 W

Carbon column resistor or thick film on

ceramic

R1, R3 200kΩ, 5%, 1/4W

R2 910kΩ, 5%, 1/4W

R4 1.2MΩ, 5%, 1/4W

RB 18.7kΩ,1%, 1/4W

RD 39kΩ, 5%, 1/4W

RDC1, RDC2 41.2kΩ, 5%, 1/4W

RFB 20.0kΩ, 1%, 1/4W

RRX 280kΩ, 1%, 1/4W

RT 562kΩ, 1%, 1/4W

RTX 20kΩ, 1%, 1/4W

RRT 150Ω, 5%, 2W

RSG VBAT = -28V, RSG = ∞

VBAT = -48V, RSG = 21.4kΩ, 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

+5V

RELAY

12V

PTC

Surgector

HC5523

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