IDTNW6005ASG【PDF 2/20 页】IC CALLER ID DECODER 20SOIC

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INDUSTRIAL TEMPERATURE RANGE

NW6005 ENHANCED TYPE II CALLER ID DECODER

Figure 10. Typical Application Circuit For Bellcore MEI Compatible Type II Telephone, 3 V Operation

NW6005

VREF

IN1+

IN1-

GS1

GND

OSCIN

OSCOUT

CB0

DCLK

DATA

IN2+

IN2-

GS2

CB2

CB1

VCC

ST/GT

EST

DR/STD

Telephone

Hybrid

TIP

RING

Tx+

Tx-

Rx-

Rx+

Speaker

TIP

RING

39k

282k

56k

GND

470k

2n2

56k

200k

100n

100n,

20%

VCC= 3V +/-10%

FSK Interface Mode 1 is selected

Xtal

To Microcontroller

From Microcontroller

282k

Microphone

Note:

1. Resistors are 1%, 0.1Watt; Unless stated, capacitors are 5%, 6.3 V.

2. All diodes in the circuit are 1N4148 or equivalent.

3. Xtal is 3.579545 MHz, 0.1% crystal or ceramic resonator.

4. Tip/Ring op amp gain = 0 dB; Hybrid Receive op amp gain = -3 dB.

5. For 1000 Vrms, 60 Hz isolation from Tip to Earth and Ring to Earth:

R1, R2 = 430 k, 0.5 W, 5%, 500 V min.

C1, C2 = 2n2, 250 V min.

6. For BT application, R3=R4= 422k;

For Bellcore application, R3=825k, R4=226k.

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