WS2418
Symbol
V
CC
I
CC
V
ON
V
ONR
V
SUS
R
D(OFF)
V
O(P-P)
I
SC
TELEPHONE TONE
RINGER WITH BRIDGE DIODE
Characteristics
Min.
Typ.
1.5
12.2
8
8
6.4
V
CC
-3
35
DC ELECTRICAL CHARATERISTICS (T
A
=25℃)
℃
Max.
26
1.8
13
10
8.8
Units
V
mA
V
V
V
KΩ
V
mA
Test Conditions
V
CC
=8.8 to 26V
R
A
=1KΩ
Supply Voltage
Current Consumption Without load
Activation Voltage
Activation Voltage Range
Sustaining Voltage
Different
Resistance
in
OFF
Condition
Output Voltage Swing
Short Circuit Current
V
CC
=26V
AC ELECTRICAL CHARACTERISTICS
Symbol
F
H1
F
H2
f
H1R
f
S
Characteristic
Output Frequency
Min.
Typ.
2300+300
1700+300
Max.
Units
H
Z
Test Conditions
V
CC
=26V, R1=14KΩ
V
C
=0V(PIN3)
V
C
=6V(PIN3)
R
1
=27KΩ To 1.7KΩ
R
1
=14KΩ,C
1
=100nF
f
H1
Range
Sweep Frequency
0.1
8
15
KHz
H
Z
TEST AND APPLICATION CIRCUIT
TIP
1
F,250V
AC
2.2K
R
A
0.22 F
10K
C
2
R
2
8
6
5
10K
TEL LINE
C
3
10
F
V
CC
7
1
2
WS2418
Piezo
3
4
V
OUT
1300 :8
C
1
100nF
R
1
12K
RING
5 f , f =
1000
1.75.10
4
1.75
.
800
f
1
=
3.22X
, f
2
=
7
1
S
C (nF )
R
1
(K )
1
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.
WINGS [ WING SHING COMPUTER COMPONENTS ]
