XEV90 Ver la hoja de datos (PDF) - Unspecified

Número de pieza

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Lista de partido

XEV90

56 KBPS DAA in a PLCC Package

Unspecified 

Typical Connection Diagram

RJ11

C1

+5V

XEV90

20K

RC336ACF

RV1

FB1

1

2 Ring

RI(-) 18

RI(+) 17

320 ohms

RingD

TXA1

3 Tip

FB2

C2

4

L1

5 L2

OH(+) 16

T1 15

T2 14

Rin

10K

VC

6 L1

7

8 DC1

J1

9 DC2

/Mute 13

OH(-) 12

+5V

VCC 11

Gnd 10

TXA2

Telin

-OH

Notes on Application Schematic:

The Schematic above shows connections to support North American regulations. Use in North America requires

compliance with FCC Part 68 Rules.

When jumper J1 is installed loop current is limited to just 60 milliamps. J1 must be removed for FCC Part 68

compliance.

L1 provides the Billing Tone Filter required in some countries.

C1 and C2 are 47 picofarad 1500 Volt Capacitors provided for EMI filtering. High voltage capacitors are required to

maintain the isolation barrier between the telephone line and the host equipment.

FB1 and FB2 are Ferrite beads. They provide EMI filtering. They should present an impedance of at least 100 ohms

at 100 MHz.

RV1 protects the XEV90 from voltage surges generated by near lightning strikes. Xecom recommends a Teccor

Electronics P3100BA70 Sidactor. This device has a typical breakover voltage of 300 volts.

The 320 ohm resistor between T1 and TXA1 provides the optimal resistance for the XEV90 to match the impedance

of a standard 600 ohm line.

The Mute signal can be used to provide low-impedance pulse dialing.

XECOM

(6)

XEV90

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