E-STLC3055N 查看數據表（PDF） - STMicroelectronics

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E-STLC3055N

WLL and ISDN-TA subscriber line interface circuit

STMicroelectronics 

Electrical characteristics

STLC3055N

Figure 16. T/L transversal to longitudinal conversion T/L = 20Log|Vrx/Vcm|

600ohm

300ohm 100μF

Vcm

Impedance matching

better than 0.1%

W&G GH1

100μF

100mA

DC max

Zin = 100K

200 to 6kHz

100μF

300ohm 100μF

TIP

TX

STLC3055N

application

circuit

RING

RX

Vrx

Figure 17. VTTX metering pulse level on line

Vlttx

200ohm

TIP

TX

STLC3055N

application

circuit

RING

RX

CKTTX

fttx (12 or 16kHz)

Figure 18. V2Wp and W4Wp: idle channel psophometric noise at line and TX.

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

Vl

psophometric

filtered

W&G GH1

600ohm

100μF

100mA

DC max

Zin = 100K

200 to 6kHz

100μF

TIP

TX

STLC3055N

application

circuit

RING

RX

Vtx

psophometric

filtered

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