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L8576B

Dual Ringing SLIC

Agere -> LSI Corporation 

L8576B Dual Ringing SLIC

Description (continued)

Data Sheet

May 2001

VBAT

VCC VBAT

RDCT*

300 kΩ

CVCC

0.1 µF

10 V

RPWRa

2.2 kΩ

5%,

2W

RGX1a RGX2a

16.9 kΩ 7.5 kΩ

CF1a, 0.22 µF, 100 V

10% POLYESTER

40

43

38

41

24 1 37

32 TG1 33 TG2

GAIN = 125 V/A

+

44

ac

CF2a, 0.22 µF, 100 V

CONDITIONER 1/2 L8576

–AX

10% POLYESTER

SLIC

RECTIFIER

RPT1a

TIP

30

PTa

CH 0

FGND

8

1 36

7

2

6 L7591 3 VBAT

5

4

PRa

RING

35

RPR1a

30

DCOUTa 29

RPROGa

51.1 kΩ

CPROGa

0.056 µF

50 V

IPROGa 28

A=6

+

–

X1

VCC

–X1

VCCa

75 µA

(130 µA

RINGING)

+ LCTHa

–

+

–

30 RTTHa 31 RTFLTa 25 42

RGX3a

10 kΩ

34

CVBATa

0.1 µF

100 V

CTG1a

470 pF

10 V

CBa

0.33 µF

10 V

RT2a

40.2 kΩ

VITRa

27

RCVPa

RT1a

41.2 kΩ

RRCVa

143 kΩ

RCVNa

26

RGNa

27.4 kΩ

RGa

27.4 kΩ

RRNG

23 28.7 kΩ

RRNG

NSTATa

39

VDD

NSTATa VCC

RDCR*

300 kΩ

RTTHa

52.3 kΩ

RTFLTa

383 kΩ

CRTa

0.1 µF

50 V

BGNDa

AGNDa

VBAT

AGND

BGND

DGND

VBAT

FGND

CC1A

0.1 µF

10 V

RHBa

309 kΩ

CC2a

33 nF

10 V

RXa

154 kΩ

TO DTMF

RECEIVER

VFXIN1

20

VFRO1

17

19 GSX1

–

+

+2.4 V

1/2 T8503

CODEC

6

DX

11

DR

12

MCLK

9

FSX1

13

FSR1

14

GNDA1 18 10 DGND

+5 V

–65 V

GND

VDD

DX

DR

MCLK

FS0

* RDCT and RDCR (optional) are only required to keep the NSTAT output at a steady state during the disconnect state.

5-8414a (F)

Notes:

TX = –2 dB.

RX = –4 dB.

Termination = 600 Ω.

Hybrid balance = 600 Ω.

Ring trip optimized for 20 Hz.

Figure 2. Typical 600 Ω Application Circuit (Only One Channel Shown)

4

Agere Systems Inc.

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