STLC3075(2005) 데이터 시트보기 (PDF) - STMicroelectronics

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STLC3075
(Rev.:2005)

INTEGRATED POTS INTERFACE FOR HOME ACCESS GATEWAY AND WLL

STMicroelectronics 

STLC3075

Figure 21. V2Wp and W4Wp: Idle channel psophometric noise at line and TX.

V2Wp = 20Log|Vl/0.774l|; V4Wp = 20Log|Vtx/0.774l|

W&G GH1

Vl

psophometric

filtered

600ohm

100 F

100mA

DC max

Zin = 100K

200 to 6kHz

100 F

TIP

TX

STLC3075

application

circuit

RING

RX

Vtx

psophometric

filtered

6 APPENDIX B

6.1 STLC3075 Overvoltage Protection

Figure 22. Simplified configuration for indoor overvoltage protection

BGND

STLC3075

TIP

RP1

RING

RP1

STPR120A

RP2

RP2

TIP

RING

VBAT

STPR120A

RP1 = 30ohm:

RP2 =Fuse or PTC > 18ohm

Figure 23. Standard overvoltage protection configuration for K20 compliance

22/26

BGND

STLC3075

TIP

RING

VBAT

RP1

LCP1521

RP1

RP2

RP2

TIP

RING

RP1 = 30ohm:

RP2 =Fuse or PTC > 18ohm

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