HYNIX GL68501

GL6850
GL6850
TWO TONE RINGER
Description
Pin Configuration
The GL6850 tone ringer is a monolithic device,
which incorporates two oscillators, and output
amplifier and a power supply control circuit. The
oscillator frequencies can be adjusted over a wide
range by selection of external components. One
oscillator, normally operated at a low frequency,
causes the second oscillator to alternate between its
nominal frequency and a related higher frequency. The
resulting output is a distinct warbling tone. The output
amplifier will drive either a transformer coupled
loudspeaker or a piezo-ceramic transducer.
The device can be powered from a telephone line or
a fixed d.c. supply. The power control circuit has builtin hysteresis to prevent false triggering and rotary dial
chirps. The GL6850 can be triggered externally under
logic control.
VCC 1
8 OUTPUT
TRIG_IN 2
7 HIGHOSC_2
GL6850
LOWOSC_1 3
6
HIGHOSC_1
LOWOSC_2 4
5
GND
Features
•
•
•
•
•
•
•
•
Low current consumption.
Designed for telephone bell replacement.
Small size MINIDIP package.
Adjustable 2- frequency tone.
Built-in hysteresis prevents false triggering and rotary dial CHIRPS.
Alarms or other alerting devices.
External triggering or ringer disable.
Include ESD protection.
Block Diagram
4
3
2
1
POWER SUPPLY
CONTROL CIRCUIT
(WITH HYSTERSIS)
LOW FREQUENCY
OSCILLATOR
5
6
HIGH FREQUENCY
OSCILLATOR
7
1
OUTPUT
AMPLIFIER
8
GL6850
Absolute Maximum Ratings (Ta = 25¡ É)
CHARACTERISTICS
SYMBOL
VALUE
UNIT
VCC
Po
Topr
Tstg
30
400
-25 to 65
-65 to 150
V
mW
Supply Voltage
Power Dissipation
Operating Temperature
Storage Temperature
¡ É
¡ É
Electrical Characteristics (Ta = 25¡ É)
CHARACTERISTICS
Operating Supply Voltage
Initiation Supply Voltage1
Initiation Supply Current1
Sustaining Voltage2
Sustaining Current2
Trigger Voltage3
Trigger Current3
Disable Voltage4
Disable Current4
SYMBOL
VCC
VSI
ISI
VSUS
ISUS
VTR
ITR
VDIS
IDIS
Output Voltage High
VOH
Output Voltage Low
VOL
TEST CONDITION
VCC = 15 V
VCC = 15 V
VCC = 21 V
VCC = 21 V
VCC =21V, I8=-10mA
Pin6 =6V,Pin7=GND
VCC =21V, I8= -10mA
Pin6= GND,Pin7=6V
MIN
17
0.9
9.7
0.4
9.5
40
-50
TYP
19
2.0
11.0
1.0
-
MAX
29.0
21
3.7
12.0
2.0
10005
0.8
-
UNIT
V
V
mA
V
mA
V
µA
V
µA
17
19
21
V
-
-
2
V
461
576
9.0
461
640
10
563
704
11.0
Hz
Hz
Hz
fH1
High Frequency 1
High Frequency 2
Low Frequency
fH2
fL
R3=191K, C3=6800Pf
R3=191K, C3=6800pF
R2=165K, C2=0.47µF
* NOTE
1.
2.
3.
4.
5.
Initial supply voltage (VSI) is the supply voltage required to start the tone ringer oscillation.
Sustaining voltage (VSUS) in the supply voltage required to maintain oscillation.
VTR and ITR are the conditions applied to trigger to start for VSUS¡ Â
VCC¡ Â
VSI
VDIS and IDIS are the conditions applied to trigger to inhibit oscillation for VSI¡ ÂVCC
Trigger current must be limited to this value externally.
2
GL6850
PIN DESCRIPTION
PIN NUMBER
PIN 1
PIN FUNCTION
VCC
PIN2
TRIG_IN
PIN3
LOWOSC_1
PIN 4
LOWOSC_2
PIN 5
PIN 6
GND
HIGHOSC_1
PIN 7
HIGHOSC_2
PIN 8
OUTPUT
DESCRIPTION
Operating supply D.C. voltage rectified from ringing signal.
Oscillator External Trigger/Inhibit pin (must beconnected through
a current limiting resistor, which is used to program the slope of
supply current vs voltage.)
Low Frequency Time Constant Adjustment pins fL is controlled
externally by R2 and C2
fL = 1/1.289R2C2
Ground
High Frequency Time Constant Adjustment Pins fH1 and fH2 are
controlled externally by R3 and C3.
fH1=1/1.504R3C3, fH2 = 1/1.203R3C3
Tone output
APPLICATON CIRCUIT
TIP
C1
R1
C5
100K-200K
RING
C1 = 0.9uF
C2 = 0.47uF
C3 = 6.8nF
C4 = 22uF / 35V
C5 = 0.22uF
D1 = 29 V ZD
C4
R1 = 560 ohm
R2 = 165 kohm
R3 = 191 kohm
1
8
2
7
GL 6850
3
6
4
5
D1
R2
C2
10K
VOLUME
R3
C3
15K
1300 : 8 ohm
3