Page 1
TECHNICAL DATA
1
INTEGRAL
Tone Ringer
The IN2410 is a bipolar integrated circuit designed for telephone bell
replacement.
•
Designed for Telephone Bell Replacement
•
Low Curent Drain
•
Adjustable 2-frequency Tone
•
Adjustable Warbling Rate
•
Extension Tone Ringer Modules
•
Alarms or Other Alerting Devices
•
External Triggering or Ringer Disable
•
Built-in hysteresis prevents false triggering and rotary dial ‘Chirps’
IN2410
ORDERING INFORMATION
IN2410N Plastic
IZ2410 Chip
TA = -40° to 65° C
PIN ASSIGNMENT
V
RE
CC
LFI
LF0
OUT
HFI
HF0
GND
LOGIC DIAGRAM
PIN 1 = V
CC
PIN 5 = GND
1. Output amplifier
2. High frequency oscillator
3. Low frequency oscillator
4. Hysteresis regulator
(Regulator circuit has built-in hysteresis to prevent false
triggering and rotary dial “Chirps”)
Page 2
IN2410
2
INTEGRAL
PIN DESCRIPTION
Name
Pin
Description
V
CC
1 Positive power supply.
R
E
2 Initiation of oscillation start input
External resistor
LFI 3 Low frequency oscillator input
LF0 4 Low frequency oscillator output
GND 5 Negative power supply
HF0 6 High frequency oscillator output
HFI 7 High frequency oscillator input
Out 8 Tone output
MAXIMUM RATINGS
*
Symbol Parameter Value Unit
V
CC
DC Supply Voltage (Referenced to GND) to +30.0 V
P
D
Power Dissipation in Still Air, Plastic DIP 400 mW
Tstg Storage Temperature -65 to +150
°
C
*
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Max Unit
V
CC
DC Supply Voltage (Referenced to GND) 13.0 29.0 V
T
A
Operating Temperature -45 +65
°
C
This device contains protection circuitry to guard against damage due to high static voltages or electric
fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages
to this high-impedance circuit. For proper operation, V
IN
and V
OUT
should be constrained to the range GND≤(VIN or
V
OUT
)≤VCC.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V
CC
). Unused
outputs must be left open.
Page 3
IN2410
3
INTEGRAL
ELECTRICAL CHARACTERISTICS
(Voltages Referenced to GND, TA = -40 to +65°C)
Guaranteed Limits
Symbol
Parameter
Test Conditions Min Typ Max Unit
V
SI
Initiation Supply Voltage
(1)
See Fig. 1 16.8 21.2 V
I
SI
Initiation Supply Current
(1)
1.4 4.2 mA
V
SUS
Sustaining Voltage (2) See Fig. 1 9.5 12.2 V
I
SUS
Sustaining Current (2) No Load VCC=V
SYS
See Fig. 1
0.7 2.5 mA
V
TR
Trigger Voltage (3) VCC=15V 8.8 12.2 V
I
TR
Trigger Current (3,5) VCC=15V 5.0 1000
µ
A
V
DIS
Disable Voltage (4) VCC=21V - 0.7 V
I
DIS
Disable Current (4) VCC=15V -20 -
µ
A
V
OH
High-Level Output
Voltage
VCC=21V, IOH=-15mA,
Pin 6=GND, Pin 7=6V
16.7 21.0 V
V
OL
Low-Level Output
Voltage
VCC=21V, IOL=15mA,
Pin 6=6V, Pin 7=GND
-1.8V
I
IN
Maximun Input Leakage
Current (Pin 3)
Pin 3=6V,
Pin 4=GND, V
CC
=21V
-1.0
µ
A
(Pin 7) Pin 7=6V,
Pin 6=GND, V
CC
=21V
-1.0
µ
A
f
H1
High Frequency 1
R
3
=191KΩ,C3=6800pF
461 563 Hz
f
H2
High Frequency 2
R
3
=191KΩ,C3=6800pF
576 704 Hz
f
L
Low Frequency
R
2
=165KΩ, C2=0.47µF
9.0 11.0 Hz
Notes:
1. Initiation supply voltage (V
SI
) is the supply voltage required to start the tone ringer oscillating.
2. Sustaining voltage (V
SUS
) is the supply voltage required to maintain oscillation.
3. V
TR
and ITR are the conditions applied to trigger in to start oscillation for V
SUS
≤
V
CC
≤
V
SI
.
4. V
DIS
and I
DIS
are the conditions applied to trigger in to inhibit oscillation for V
SI
≤
V
CC
.
5. Trigger current must be limited to this value externally.
Page 4
IN2410
4
INTEGRAL
CIRCUIT CURRENT-SUPPLY VOLTAGE (NO LOAD)
Figure 1
APPLICATION CIRCUIT
Figure 2
Page 5
IN2410
5
INTEGRAL
APPLICATION NOTE
The application circuit illustrates the use of the IN2410 devices in typical telephone or extension tone ringer
application.
The AC ringer signal voltage appears across the TIP and RING inputs of the circuit and is attenuated by capacitor
C
1
and resistor R1.
C
1
also provides isolation from DC voltages (48V) on the exchange line.
After full wave rectification by the bridge diode, the waveform is filtered by capacitor C
4
to provide a DC supply for
the tone ringer chip.
As this voltage exceeds the initiation voltage (V
SI
), oscillation starts.
With the components shown, the ouptut frequency chops between 512(f
h1
) and 640Hz(fh2) at a 10Hz(fL) rate.
The loudspeaker load is coupled through a 1300Ω to 8Ω ransformer.
The output coupling capacitor C
5
is required with transformer coupled loads.
When driving a piezo-ceramic transducer type load, the coupling C
5
and transformer (1300Ω:8Ω) are not required.
However, a current limiting resistor is required.
The low frequency oscillator oscillates at a rate (f
L
) controlled by an external resistor (R2) and capacitor (C2).
The frequency can be determined using the relation f
L
=1/1.289R2*C2. The high frequency oscillates at a fH1, f
H2
controlled by an external resistor (R3) and capacitor (C3). The frequency can be determined using the relation
f
H1
=1/1.504R3*C3, fH2=1/1.203R3*C3.
TRIGGERING IN2410 FROM CMOS OR TTL LOGIC
Figure 3
Figure 4
Page 6
IN2410
6
INTEGRAL
EQUIVALENT CIRCUIT (Pin 2 Input) INHIVITING OSCILLATION
Figure 5
Figure 6
PROGRAMMING THE IN2410 INITIATION SUPPLY VOLTAGE
Figure 7
Figure 8
Page 7
IN2410
7
INTEGRAL
CHIP DIAGRAM
Chip size 1,40 x 1,30 mm
Pad size 0,130 x 0,130 mm
PAD LOCATION
Pad No Symbol
01 Vcc
02 R
E
03 LFI
04 LFO
05 GND
06 HFO
07 HFI
08 OUT
0,49
08
07
06
05
0,015
0,485
0,265
0,525
0,525
0,405
0,135
0,075
0,075
GND
HFO
Vcc
RE
HFI
0,345
1,4 0,03
±
1,3 0,03
±
IZ2410
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