MC14LC5447

9

APPLICATION CIRCUIT

TO PHONE

DISPLAY

MCU

INTERRUPT

VDD

0.1

µF

2 k

Ω

2 k

Ω

3.68 MHz

VDD

270 k

Ω

0.2

µF

470 k

Ω

18 k

Ω

15 k

Ω

TIP

RING

C3

10 k

Ω

10 k

Ω

500 pF

500 pF

C4

C1

0.2

µF

C2

0.2

µF

VDD

RT 6

NC 5

RDI1 3

RI 2

TI 1

RDI2 4

PWRUP 7

12 RDO

13 CDO

14 DOR

15 DOC

11 CLKSIN

10 OSCin

9 OSCout

16

8

Figure 8. Adjunct Box Concept for Calling Number Display

0.5

SEC

2 SECONDS

DATA

FIRST RING

0101

1

0.5

SEC

2 SECONDS

SECOND RING

NOTE 1

NOTE 1

NOTE 2

INTERRUPT

FOR MCU

DOC

CDO

PWRUP

RDO

RT

DOR

RI

OSC

DATA

3.58 MHz, 3.6864 MHz, OR 455 kHz

DATA

NOTES:

1. MCU must assert PWRUP to MC14LC5447.

2. No data detected, MCU powers down the MC14LC5447.

Timing Diagram for Figure 8

AR

CH

IVE

D B

Y F

RE

ES

CA

LE

SE

MI

CO

ND

UC

TO

R,

INC

.