Integral IL2411D Tone ringer Datasheet

TECHNICAL DATA
IL2411N/D
Tone Ringer
The IL2411 is a bipolar integrated circuit designed for telephone
bell replacement.
• Designed for Telephone Bell Replacement
• Low Current Drain
• Adjustable 2-frequency Tone
• Adjustable Warbling Rate
• Extension Tone Ringer Modules
• Alarms or Other Alerting Devices
• Adjustable for Reduced Supply Initiation Current.
• Built-in hysteresis prevents false triggering and rotary dial
‘Chirps’
8-SOP
8-DIP
TA = -45° to 65° C
LOGIC DIAGRAM
PIN ASSIGNMENT
V CC
1.
2.
3.
4.
OUT
R SL
HFI
LFI
HF0
LF0
GND
PIN 1 = VCC
PIN 5 = GND
Output amplifier
High frequency oscillator
Low frequency oscillator
Hysteresis regulator
(Regulator circuit has built-in hysteresis to
prevent false triggering and rotary dial “Chirps”)
1
IL2411
PIN DESCRIPTION
Name
Pin
Description
VCC
1
Positive power supply.
RSL
2
External resistor
LFI
3
Input low frequency oscillator
LF0
4
Output low frequency oscillator
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
VCC
DC Supply Voltage (Referenced to GND)
to +30.0
V
PD
Power Dissipation in Still Air, Plastic DIP
400
mW
-65 to +150
°C
Tstg
Storage Temperature
*
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
VCC
DC Supply Voltage (Referenced to GND)
13.0
29.0
V
TA
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, VIN and VOUT should be constrained to the range GND≤(VIN or
VOUT)≤VCC.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused
outputs must be left open.
2
IL2411
ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND, TA = -20 to +70°C)
Guaranteed Limits
Symbol
Parameter
Test Conditions
VSI
Initiation Supply Voltage
(1)
ISI
Initiation Supply Current
(1)
See Figure 1
Min
Typ
Max
Unit
16.8
21.2
V
1.4
4.2
mA
VSUS
Sustaining Voltage (2)
See Figure 1
9.5
12.2
V
ISUS
Sustaining Current (2)
No Load VCC=VSUS
See Figure 1
0.7
2.5
mA
VOH
High-Level Output
Voltage
VCC=21V, IOH=-15mA,
Pin 6=6V, Pin 7=GND
16.7
21.0
V
VOL
Low-Level Output
Voltage
VCC=21V, IOL=15mA,
Pin 6=GND, Pin 7=6V
-
1.8
V
IIN
Maximun Input Leakage
Current
(Pin 3)
Pin 3=6V,Pin 4=GND,
VCC=21V
-
1.0
µA
Pin 7=6V,Pin 6=GND,
VCC=21V
-
1.0
µA
(Pin 7)
fH1
High Frequency 1
R3=191KΩ,C3=6800pF
461
563
Hz
fH2
High Frequency 2
R3=191KΩ,C3=6800pF
576
704
Hz
fL
Low Frequency
R2=165KΩ,C2=0.47µF
9.0
11.0
Hz
Notes:
1. Initiation supply voltage (VSI) is the supply voltage required to start the tone ringer oscillating.
2. Sustaining voltage (VSUS) is the supply voltage required to maintain oscillation.
3
IL2411
CIRCUIT CURRENT-SUPPLY VOLTAGE (NO LOAD)
Figure 1
SUPPLY CURRENT (NO LOAD) VC. SUPPLY VOLTAGE
Figure 2
4
IL2411
APPLICATION CIRCUIT
F
igure 3
APPLICATION NOTE
The application circuit illustrates the use of the IL2411 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 C1
and resistor R1.
C1 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 C4 to provide a DC supply for
the tone ringer chip.
As this voltage exceeds the initiation voltage (VSI), oscillation starts.
With the components shown, the ouptut frequency chops between 512(fh1) and 640Hz(fh2) at a 10Hz(fL) rate.
The loudspeaker load is coupled through a 1300Ω to 8Ω transformer.
The output coupling capacitor C5 is required with transformer coupled loads.
When driving a piezo-ceramic transducer type load, the coupling C5 and transformer (1300Ω:8Ω) are not required.
However, a current limiting resistor is required.
The low frequency oscillator oscillates at a rate (fL) controlled by an external resistor (R2) and capacitor (C2).
The frequency can be determined using the relation fL=1/1.289R2*C2. The high frequency oscillates at a fH1, fH2
controlled by an external resistor (R3) and capacitor (C3). The frequency can be determined using the relation
fH1=1/1.504R3*C3, fH2=1/1.203R3*C3.
Pin 2 allows connection of an external resistor RSL, which is used to program the solpe of the supply current vs supply
voltage characteristics (see Fig2), and hence the supply current up to the initiation voltage ( VSI ). This initiation voltage
remains constant independent of RSL.
The supply current drawn prior to triggering varies inversely with RSL, decreasing for increasing value of resistance.
Thus, increasing the value of RSL will decrease the amount of AC ringing current required to trigger the device. As such,
longer sucribser loops are possible since less voltage is dropped per unit length of loop wire due to the lower current
level. RSL can also be used to compensated for smaller AC couplin capacitors (C5 on Fig 3) (higher impedance) to the
line which can be used to alter the ringer equivalence number of a tone ringer circuit.
The graph in Fig2 illustrates the variation of supply current with supply voltage. Three curves are drawn to show the
variation of initiation current with RSL. Curve B( RSL=6.8KΩ) shows the I-V characteristic for the IL2411 tone ringer.
Curve A is a plot with RSL<6.8KΩ and shows an increase in the current drawn up to the initiation voltageVSI. The I-V
characteristic after initiation remains unchanged. Curve C illustrates the effect of increasing RSL above 6.8KΩ initiation
current decreases but again current after triggering is unchanged.
5
IL2411
N SUFFIX PLASTIC DIP
(MS – 001BA)
A
Dimension, mm
5
8
B
1
4
MIN
MAX
A
8.51
10.16
B
6.1
7.11
5.33
C
L
F
Symbol
C
D
0.36
0.56
F
1.14
1.78
-T- SEATING
PLANE
N
G
M
K
0.25 (0.010) M
J
H
D
T
NOTES:
1. Dimensions “A”, “B” do not include mold flash or protrusions.
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
G
2.54
H
7.62
J
0°
10°
K
2.92
3.81
L
7.62
8.26
M
0.2
0.36
N
0.38
D SUFFIX SOIC
(MS - 012AA)
Dimension, mm
A
8
5
B
H
1
G
P
4
D
K
MIN
MAX
A
4.8
5
B
3.8
4
C
1.35
1.75
D
0.33
0.51
F
0.4
1.27
R x 45
C
-T-
Symbol
SEATING
PLANE
J
F
0.25 (0.010) M T C M
NOTES:
1. Dimensions A and B do not include mold flash or protrusion.
2. Maximum mold flash or protrusion 0.15 mm (0.006) per side
for A; for B ‑ 0.25 mm (0.010) per side.
M
G
1.27
H
5.72
J
0°
8°
K
0.1
0.25
M
0.19
0.25
P
5.8
6.2
R
0.25
0.5
6
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