HEI GL6850 Datasheet

GL6850

1

1 2 3 4 5 6 7

8

VCC

TRIG_IN

LOWOSC_1

LOWOSC_2

OUTPUT

HIGHOSC_2

HIGHOSC_1

GND

6 7 8 4 3

LOW FREQUENCY

HIGH FREQUENCY

OUTPUT

GL6850

TWO TONE RINGER

Description

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.

Pin Configuration

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.

GL6850

Block Diagram

POWER SUPPLY
CONTROL CIRCUIT
(WITH HYSTERSIS)

5

OSCILLATOR

2

OSCILLATOR

1

AMPLIFIER

2

Absolute Maximum Ratings (Ta = 25¡É)

CHARACTERISTICS SYMBOL VALUE UNIT

Supply Voltage
Power Dissipation
Operating Temperature
Storage Temperature

VCC

Po

Topr

Tstg

30

400

-25 to 65

-65 to 150

Electrical Characteristics (Ta = 25¡É)

GL6850

V

mW

¡É
¡É

CHARACTERISTICS SYMBOL TEST CONDITION MIN TYP MAX UNIT
Operating Supply Voltage V
Initiation Supply Voltage
Initiation Supply Current
Sustaining Voltage
Sustaining Current
Trigger Voltage
Trigger Current
Disable Voltage
Disable Current

2

2
3
3

4

4

Output Voltage High V

Output Voltage Low V

High Frequency 1
High Frequency 2
Low Frequency

* NOTE

1. Initial supply voltage (VSI) is the supply voltage required to start the tone ringer oscillation.

2. Sustaining voltage (V

3. VTR and ITR are the conditions applied to trigger to start for V

4. V

DIS

and I

DIS

5. Trigger current must be limited to this value externally.

1
1

CC

V

SI

I

SI

V

SUS

I

SUS

V

TR

I

TR

V

DIS

I

DIS

V

OH

OL

f

H1

f

H2

f

L

) in the supply voltage required to maintain oscillation.

SUS

CC

Pin6 =6V,Pin7=GND
V

CC

Pin6= GND,Pin7=6V

R3=191K, C3=6800Pf
R3=191K, C3=6800pF

R2=165K, C2=0.47µF

- - 29.0 V
17 19 21 V

0.9 2.0 3.7 mA

9.7 11.0 12.0 V

0.4 1.0 2.0 mA

V

= 15 V 9.5 - - V

CC

V

= 15 V 40 - 1000

CC

V

= 21 V - - 0.8 V

CC

V

= 21 V -50 - - µA

CC

=21V, I8=-10mA

=21V, I8= -10mA

17 19 21 V

- - 2 V

461
576

9.0

¡ÂVCC¡ÂVSI

SUS

461
640

10

are the conditions applied to trigger to inhibit oscillation for VSI¡Â VCC

5

563
704

11.0

µA

Hz
Hz
Hz