© 1997 MX

•COM Inc.

www.mxcom.com Tele: 800 638-5577 910 744-5050

Fax: 910 744-5054

Doc. # 20480086.003

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Global Call Progress Tone Detector

3

MX613

Preliminary Information

Application Information

Component

Value

R

1

22.0k

Ω

R

2

1.0M

Ω

C

1

0.01µF

C

2

0.1µF

C

3

1.0µF

C

4

1.0µF

C

5

33.0pF

C

6

33.0pF

X

1

3.579545MHz

Tolerances: C = ± 20% R = ± 10%

Notes

(1) The Xtal/Clock input may be driven from the host telephone

system's 3.579545MHz clock; if a Xtal drive is required, the

(2) The audio signal should be input to both Signal In and Level In

pins via separate coupling capacitors. If it is wished to operate

the device with disregard to on-chip level thresholds and

permanently enable the MX613, the Level In pin should be held

at

V

To disable the MX613 the Level In pin should be held at V

Level thresholds are preset internally.

Figure 3

-

HI/LO Decode Bands

Figure 2 - External Component Connections

0

0

200

400

600

800

1000

1200

1400

1600

1800

2000

2200

-50

-40

-30

-20

-10

775mVrms

Must

Decode

Frequency (Hz)

Must-Not

Decode

Low Band

(LO)

High Band

(HI)

V

DD

V

DD

V

SS

C

1

C

4

C

2

C

3

R

1

V

BIAS

1

2

3

4

5

6

7

8

14

15

16

13

12

11

10

9

MX613DW

SERIAL CLOCK INPUT

DATA OUT

LEVEL IN

SIGNAL IN

AUDIO SIGNAL

XTAL/CLOCK

V

DD

XTAL

IRQ

CHIP SELECT

C

5

C

6

R

2

X

1

1

2