IL2418

TECHNICAL DATA
IL2418
Telephone Tone Ringer with
Bridge Diode
The IL2418 is a monolithic integrated circuit telephone tone ringer with
bridge diode, when coupled with an appropriate transducer, it replaces the
electro-mechanical bell. The device is designed for use with either a piezo
transducer or an inexpensive transformer coupled speaker to produce a
pleasing tone composed of a high frequency (fR) alternating with a low
frequency (fL) resulting in a warble frequency. The supply voltage is
obtained from the AC ring signal and the circuit is designed so that noise
on the line or variation of the ringing signal can not affect correct
operation of the device.
 On chip high voltage full wave diode bridge rectifier
 Low current consumption, in order to allow the parallel operation of
the 4 devices
 Low external component count
 Tone and switching frequencies adjustable by external components
 High noise immunity due to built-in voltage-current hysteresis
 Activation voltage adjustable
 Internal zener diodes to protect against over voltages
 Ringer impedance adjustable with external components
IL2418N Plastic DIP
IL2418D/DT
SOIC
PIN ASSIGNMENT
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
Packing
IL2418N
IL2418D
IL2418DT
TA = -40 to 70 C
DIP8
SOP8
SOP8
Tube
Tube
Tape & Reel
BLOCK DIAGRAM
2011, March, Rev. 01
IL2418
MAXIMUM RATINGS* (TA = 25C)
Symbol
Parameter
Value
Unit
VTP
Calling Voltage (f = 50 Hz) Continuous
120
Vrms
VTP
Calling Voltage (f = 50 Hz) 5 Sec ON/10 Sec OFF
200
Vrms
ICC
Supply Current
22
mA
C
* Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device.
These are stress ratings only and functional operation of the device at these or any other conditions beyond those
indicated under “recommended operating conditions” is not implied.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Tstg
Storage and Junction Temperature
-60 to +125
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
VCC
Supply Voltage
TA
Operating Temperature
Min
-40
Max
Unit
26
V
+70
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 V CC). Unused
outputs must be left open.
ELECTRICAL CHARACTERISTICS (TA = 25C)
Symbol
Parameter
ICC
Current Consumption without
Load
VON
Activiation Voltage
VONR
Activiation Voltage Range
VSUS
Sustaining Voltage
RD
Test Conditions
Guaranteed Limits
Min
VS=8.8 to 26 V
RA = 1 K
Max
Unit
1.8
mA
12.2
13
V
8
10
V
8
8.8
V
Differential Resistance in Off
Condition
VTIP = 8.0 V
VRING = 0 V
6.4
3500
K
VOUT
Output Voltage Swing
VS = 26 V,
VSRC = 8.0 V,
VOFR = 8.0 V
21
25.5
V
IOUT
Short Circuit Current
VS = 26 V
30
80
mA
2011, March, Rev. 01
IL2418
AC CHARACTERISTICS
Symbol
Parameter
fH1
fH2
fL
Guaranteed Limits
Test Conditions
Output Frequencies
fH1
fH2
VCC = 26 V, R1 = 14 K
VSCR = 0 V
V SCR = 6 V
fH Range max
VCC = 26 V, R1 = 1.7 K,
VSCR = 0 V
fH Range min
VCC = 26 V, R1 = 27 K,
VSCR = 6.0 V
Sweep Frequency
VCC = 26 V, C1 = 100 nF
Min
Max
1960
1420
2570
1840
14
Unit
Hz
Hz
KHz
7.0
0.11
KHz
13.0
Hz
TEST AND APPLICATION CIRCUIT
1 F, 250VAC
Ra
2.2 K
0.22 F
TIP
R2
C2
10K
8
TEL LINE
5
IL2418
7
C3
10 F
6
1
2
3
10K
Piezo
4
VOUT
1300:8
RING
C1
100nF
R1
14K
VS
f1 = 3.22 104 / R1 (K); f2 = 5/7 f1; fsweep = 1000 / C1(nF)
DESCRIPTION
The IL2418 tone ringer derives its power supply by rectifying the AC ringing signal. It uses this power to activate
two tone generators. The two tone frequencies generated are switched by internal oscillator in a fast sequence and made
audible across an output amplifier in the loudspeaker; both tone frequencies and the switching frequency can be
externally adjusted.
The device can drive either directly a piezo ceramic converter (buzzer) or small loudspeaker. In case of using a
loud-speaker, a transformer is needed.
An internal shunt voltage regulator provides DC voltage to the output stage, low frequency oscillator, and high
frequency oscillator. To protect the IC from telephone line transients, a zener Diode is included.
2011, March, Rev. 01
IL2418
N SUFFIX PLASTIC DIP
(MS – 001BA)
A
Dimension, mm
5
8
B
1
4
F
Symbol
MIN
MAX
A
8.51
10.16
B
6.10
7.11
C
L
C
5.33
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
0.20
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
4.80
5.00
B
3.80
4.00
C
1.35
1.75
D
0.33
0.51
F
0.40
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
0.10
0.25
M
0.19
0.25
P
5.80
6.20
R
0.25
0.50
2011, March, Rev. 01