W91030 Ver la hoja de datos (PDF) - Winbond

Número de pieza

componentes Descripción

Fabricante

W91030

CALLING LINE IDENTIFIER

Winbond 

Preliminary W91030B

APPLICATION INFORMATION

Application Circuit

Analog Interface

The application circuit of the W91030B in Figure 9-1 shows the device being used within a typical

CPE system. Note that only the circuit between the W91030B and the line interface is shown. The

gain control op-amp is set to unity gain to allow the electrical characteristics to be met in this

application circuit. It should also be noted that if a glitch with sufficient amplitude appears on the tip

and ring interface, this will be detected as a ringing input by this circuit.

Tip/A

22nF

430K

+5V

34K

W91030B

+5V

+5V

+5V

0.1uF

Ring/B

22nF

430K

0.1uF 470K

0.1uF 470K

+5V

34K

464K

INP

INN

GCFB

0.1uF

+5V

53K6 60K4

VREF

(This net must as short as possible)CAP

RNGDI

+5V

RNGRC

RNGON

200K

150K

MODE

OSCI

300K

0.22uF

OSCO

VSS

VDD

ALGRC

ALGR

ALGO

INTN

FCDN

FDRN

DATA

DCLK

FSKE

SLEEP/

RESET

TEST

10K

R1 R2

Must rest by

microcontroller

or by RC pulse.

Resistor must have 1% tolerance.

Resistor may have 5% tolerance.

Crystal is 3.579545MHz with 0.1% frequency tolerance.

R1, R2 must calculated according to the formula of Fig. 7-6 (a)

for Bellcore or BT application.

FSK 3-wire interface Mode 0 selected.

Figure 9-1 Application Circuit

Another application circuit for the W91030B, which provides common mode rejection of ringing circuit

signals, is shown in Figure 9-2. When the AC voltage between the tip and ring is greater than the

zener diode breakdown voltage, the photo-coupler LED will turn on, driving RNGDI high and thus

detecting a ringing signal. Note however in this case, a glitch on the tip and ring interface is not able

to turn on the photo-coupler and therefore will not be detected as a ringing signal.

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Publication Release Date: March 2000

Revision A1

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