DC ELECTRICAL CHARATERISTICS (T

℃

℃

℃)

Symbol

Characteristics

Min.

Typ.

Max.

Units

Test Conditions

V

CC

Supply Voltage

26

V

I

CC

Current Consumption Without load

1.5

1.8

mA

V

V

ON

Activation Voltage

12.2

13

V

V

ONR

Activation Voltage Range

8

10

V

R

V

SUS

Sustaining Voltage

8

8.8

V

R

D(OFF)

Different

Resistance

in

OFF

Condition

6.4

KΩ

V

O(P-P)

Output Voltage Swing

V

V

I

SC

Short Circuit Current

35

mA

V

TEST AND APPLICATION CIRCUIT

DESCRIPTION

The WS2418 tone ringer device its power supply by rectifying the AS ringing signal. It uses this

power to activate two tone generators. The two tone frequencies generators are switched by an internal

oscillator in a fast sequence and made audible across an output amplifier in the loudspeaker, both tone

frequencies and the switch frequency can be externally adjusted

The devices can driver either directly a piezo ceramic converter (buzzer) or small loudspeaker. In case

of using a loudspeaker, a transformer is need.4

An internal shunt voltage regulator provides DC voltage to the output stage, low frequency oscillator,

and high frequency oscillator. To protect the IC telephone line transients, a zener diode is include.

TEL LINE

RING

TIP

C

C

C

C

3

33

3

10 F

10 F

10 F

10 F

1 F,250V

1 F,250V

1 F,250V

1 F,250V

AC

AC

AC

AC

2.2K

2.2K

2.2K

2.2K

R

R

R

R

A

A

A

A

10K

10K

10K

10K

10K

10K

10K

10K

12K

12K

12K

12K

R

R

R

R

1

11

1

100nF

100nF

100nF

100nF

C

C

C

C

1

11

1

0.22 F

0.22 F

0.22 F

0.22 F

V

V

V

V

OUT

OUT

OUT

OUT

Piezo

Piezo

Piezo

Piezo

1300 :8

1

11

1

2

22

23

33

34

44

4

7

77

7

8

88

85

55

5

6

66

6

WS2418

V

V

V

V

CC

CC

CC

CC

R

R

R

R

2

22

2

C

C

C

C

2

22

2

ffff

1

11

=

=

=

, f

, f

, f

, f

2

22

=

=

=

1.75

1.75

1.75

1.75....10

10

10

R

R

R

R

1

11

)

(K )

(K )

(K )

5

55

5

7

77

7

ffff

1

11

, f

, f

, f

S

S

S

=

=

=

800

800

800

800

C

AC ELECTRICAL CHARACTERISTICS

Symbol

Characteristic

Min.

Typ.

Max.

Units

Test Conditions

V

F

H1

2300+300

V

F

H2

Output Frequency

1700+300

H

Z

V

f

H1R

f

0.1

15

KHz

R

f

S

Sweep Frequency

8

H

Z

R

WS2418

TELEPHONE TONE

RINGER WITH BRIDGE DIODE

1000

3.22X