HYNIX GL6840A/B

GL6840
GL6840A
Electronic Two Tone Ringer
Description
GL6840A are monolithic integrated circuits designed
to replace the mechanical bell in telephone sets,
in connection with an electro acoustical converter.
The device can drive either directly a piezo ceramic
converter(buzzer) or a small loudspeaker. In this
case a transformer is needed. The two tone frequencies generated are switched by an internal oscillator
in a fast sequence and made audible across output
amplifiers in the transducer, both tone frequencies
and switching frequency can be externally adjusted.
The supply voltage is obtained from the AC rings
signal and the circuit is designed so that noise on the
line or variations on the ringing signal cannot affect
the correct operation of the devices.
The output bridge configuration allows to use a high
impedance transducer with acoustical results much
better than in a single ended configuration. The two
outputs can also be connected independently to
different converters or actuators(acoustical, opto and
logic)
Line
1
GND
2
Sweep rate
control capacitor
3
Output freq.
Control resistor
4
8
Line
7
Rectifier
capacitor
6
Buzzer
5
Buzzer
(Top View)
Absolute Maximum Ratings
Calling Voltage(f=50§ Ô
)
continuous
Calling Voltage(f=50§ Ô
)
5s ON/10s OFF
Supply Current
Operating Temperature
Storage Temperature
Test Circuit
Features
GL6840A
Pin Configuration
For GL6840A f1 =
120Vrms
200Vrms
22§ Ì
-20 to 75¡ É
-65 to 150¡ É
3.26 x 104
x (2 - e
R1(§ Ú
)
14 - R1(§ Ú)
95
)
• Low current consumption, in order to allow the
1000
f 2 = 0.717 x f1 fsweep =
parallel operation of 4 devices
C1(§ Ý)
• Integrated rectifier bridge with zener diodes to
1§ Þ 2.2§ Ú
protect against overvoltages
Buzzer
• Little external circuitry
• Tone and switching frequencies adjustable by VAB Line
8
5
external components
GL6840A
7
6
£ «
• Integrated voltage and current hysteresis
1
2
3
4
10§ Þ
• Bridge output configuration
VS
C1
R1
14§ Ú
100§ Ý
1
GL6840
Block Diagram
7
Bridge
Diode
8
Threshold
Detector
Overvoltage
Protection
2
1
Sweep Frequency
Oscillator
Tone Generation
Oscillator
3
Output
Stage
5
6
4
Pin Description
PIN
NAME
DESCRIPTION
1,8
LINE
Input terminals to bridge diode. The AC ringing signal from the
telephone line drives the ringer through bridge.
2
GND
Ground
3
Sweep Rate
Control Capacitor
4
Output Frequency This pin is connected to external resistor to control the two tone
Control Resistor frequency(f1, f2)
5,6
Buzzer
7
Rectifier
Capacitor
This pin is connected to external capacitor to control the sweeping
frequency(fSWEEP)
The tone ringer output terminals which have inverse output phase
each others.
This pin is connected to external capacitor to change AC ringing
signal into DC voltage.
2
GL6840
Electrical Characteristics : TA=25¡ Éunless otherwise specified
PARAMETER
Supply Voltage
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNIT
26
V
1.2
1.8
§ Ì
VS(pin7)
Current Consumption without
IB
load(pin 1-8)
VS=16.5 to 29.5V
Activation Voltage
VON
12.3
13.3
14.4
V
Sustaining Voltage
VOFF
8
8.9
9.7
V
RD
6.4
Differential Resistance in
OFF condition(pin 8-1)
Output Voltage Swing
VOUT
Short Circuit Current
(pin 5-6)
IOUT
Voltage Drop between
pin 8-1 and pin 7-2
VS=20V
VD
Output Frequencies
FOUT1
F1
FOUT2
F2
VS=26V R1=14§ Ú
VS=0V
1.96
VS=6V
1.42
Programming Resistor Range
Sweep Frequency
FSWEEP
§ Ú
VS-5
V
35
§ Ì
3
V
2.3
2.65
1.67
1.92
8
C1=100§ Ý
3
7
10
§ Õ
20
§ Ú
13
§ Ô
GL6840
Typical Application
Figure1 : Single output applied pin#5
1§ Þ250V AC 2.2§ Ú
C2
VAB Tel Line
R2
0.22§ Þ
6
8
GL6840A
7
£ «
C3
10§ Þ
1
2
3
Piezo
4
C1
100§ Ý
VS
RING
10§ Ú
10§ Ú
5
C
C
C
C
TIP
Vout
C
C
C
C
Speaker
R1
14§ Ú
1300:8§ Ù
Figure2 : Single output applied pin#6
1§ Þ250V AC 2.2§ Ú
C2
VAB Tel Line
R2
0.22§ Þ
8
6
GL6840A
5
1
2
4
7
£ «
C3
10§ Þ
C1
100§ Ý
VS
RING
3
10§ Ú
10§ Ú
Piezo
C
C
C
C
TIP
Vout
R1
14§ Ú
C
C
C
C
Speaker
1300:8§ Ù
Note) Using a big size buzzer, pin#6 output is better than pin#5 output.
Figure3 : Differential output
1§ Þ250V AC
C2
VAB Tel Line
2.2§ Ú
R2
£ «
8
1
VS
10§ Ú
6
GL6840A
7
C3
10§ Þ
RING
0.22§ Þ
2
3
C1
100§ Ý
10§ Ú
5
Piezo
4
R1
14§ Ú
C
C
C
C
TIP
C
C
C
C
Speaker
1300:8§ Ù
4
GL6840
GL6840B
Electronic Two Tone Ringer
Description
GL6840B are monolithic integrated circuits designed
to replace the mechanical bell in telephone sets,
in connection with an electro acoustical converter.
The device can drive either directly a piezo ceramic
converter(buzzer) or a small loudspeaker. In this
case a transformer is needed. The two tone frequencies generated are switched by an internal oscillator
in a fast sequence and made audible across output
amplifiers in the transducer, both tone frequencies
and switching frequency can be externally adjusted.
The supply voltage is obtained from the AC rings
signal and the circuit is designed so that noise on the
line or variations on the ringing signal cannot affect
the correct operation of the devices.
The output bridge configuration allows to use a high
impedance transducer with acoustical results much
better than in a single ended configuration. The two
outputs can also be connected independently to
different converters or actuators(acoustical, opto and
logic)
Line
1
GND
2
Sweep rate
control capacitor
3
Output freq.
Control resistor
4
8
Line
7
Rectifier
capacitor
6
Buzzer
5
Buzzer
(Top View)
Absolute Maximum Ratings
Calling Voltage(f=50§ Ô
)
continuous
Calling Voltage(f=50§ Ô
)
5s ON/10s OFF
Supply Current
Operating Temperature
Storage Temperature
Test Circuit
Features
GL6840B
Pin Configuration
For GL6840B f1 =
120Vrms
200Vrms
22§ Ì
-20 to 75¡ É
-65 to 150¡ É
3.32 x 104
39 - R (§ Ú)
x (2 - e 3581 )
R1(§ Ú
)
• Low current consumption, in order to allow the
1000
parallel operation of 4 devices
f 2 = 0.717 x f1 fsweep =
C1(§ Ý)
• Integrated rectifier bridge with zener diodes to
1§ Þ 2.2§ Ú
protect against overvoltages
Buzzer
• Little external circuitry
• Tone and switching frequencies adjustable by
5
8
Line
VAB
external components
GL6840B
7
6
£ «
• Integrated voltage and current hysteresis
1
2
3
4
10§ Þ
• Bridge output configuration
VS
C1
R1
39§ Ú
100§ Ý
5
GL6840
Block Diagram
7
Bridge
Diode
8
Threshold
Detector
Overvoltage
Protection
2
1
Sweep Frequency
Oscillator
Tone Generation
Oscillator
3
Output
Stage
5
6
4
Pin Description
PIN
NAME
DESCRIPTION
1,8
LINE
Input terminals to bridge diode. The AC ringing signal from the
telephone line drives the ringer through bridge.
2
GND
Ground
3
Sweep Rate
Control Capacitor
4
Output Frequency This pin is connected to external resistor to control the two tone
Control Resistor frequency(f1, f2)
5,6
Buzzer
7
Rectifier
Capacitor
This pin is connected to external capacitor to control the sweeping
frequency(fSWEEP)
The tone ringer output terminals which have inverse output phase
each others.
This pin is connected to external capacitor to change AC ringing
signal into DC voltage.
6
GL6840
Electrical Characteristics : TA=25¡ Éunless otherwise specified
PARAMETER
Supply Voltage
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNIT
26
V
1.2
1.8
§ Ì
VS(pin7)
Current Consumption without
load(pin 1-8)
IB
VS=16.5 to 29.5V
Activation Voltage
VON
12.3
13.3
14.4
V
Sustaining Voltage
VOFF
8
8.9
9.7
V
RD
6.4
Differential Resistance in
OFF condition(pin 8-1)
Output Voltage Swing
VOUT
Short Circuit Current
(pin 5-6)
IOUT
Voltage Drop between
pin 8-1 and pin 7-2
VS=20V
VD
Output Frequencies
FOUT1
FOUT2
F1
F2
VS=26V R1=39§ Ú
VS=0V
723
VS=6V
519
Programming Resistor Range
Sweep Frequency
FSWEEP
§ Ú
VS-5
V
35
§ Ì
3
V
850
610
27
C1=100§ Ý
7
10
978
702
§ Ô
51
§ Ú
13
§ Ô
7
7
GL6840
Typical Application
Figure1 : Single output applied pin#5
1§ Þ250V AC
C2
VAB Tel Line
2.2§ Ú
R2
8
C3
10§ Þ
6
1
2
3
Piezo
4
C1
100§ Ý
VS
RING
10§ Ú
5
10§ Ú
GL6840B
7
£ «
0.22§ Þ
C
C
C
C
TIP
Vout
C
C
C
C
Speaker
R1
39§ Ú
1300:8§ Ù
Figure2 : Single output applied pin#6
1§ Þ250V AC 2.2§ Ú
C2
0.22§ Þ
R2
6
8
VAB Tel Line
GL6840B
7
£ «
C3
10§ Þ
1
2
3
Piezo
4
C1
100§ Ý
VS
RING
10§ Ú
10§ Ú
5
C
C
C
C
TIP
Vout
R1
39§ Ú
C
C
C
C
Speaker
1300:8§ Ù
Note) Using a big size buzzer, pin#6 output is better than pin#5 output.
Figure3 : Differential output
1§ Þ250V AC 2.2§ Ú
C2
0.22§ Þ
R2
8
VAB Tel Line
£ «
C3
10§ Þ
RING
GL6840B
7
1
VS
10§ Ú
6
2
3
C1
100§ Ý
10§ Ú
5
Piezo
4
R1
39§ Ú
C
C
C
C
TIP
C
C
C
C
Speaker
1300:8§ Ù
8