TECHNICAL DATA
IL6840
Telephone Tone Ringer with
Bridge Diode
ORDERING INFORMATION
IL6840N Plastic DIP
IL6840D SOIC
T
A
= -40
to 70 C
for package
The IL6840 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 (f
R
) alternating
with a low frequency (f
L
) 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
PIN ASSIGNMENT
OUT
OUT
BLOCK DIAGRAM
1
IL6840
MAXIMUM RATINGS
*
(T
A
= 25
C)
Symbol Parameter
Value
Unit
V
TP
Calling Voltage (f = 50 Hz) Continuous
120
Vrms
V
TP
Calling Voltage (f = 50 Hz) 5 Sec ON/10 Sec OFF
200
Vrms
I
CC
Supply
Current
22
mA
Tstg
Storage and Junction Temperature
-60 to +125
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
Supply
Voltage
26
V
T
A
Operating
Temperature
-40 +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, V
IN
and V
OUT
should be constrained to the range GND
(V
IN
or
V
OUT
)
V
CC
.
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
(T
A
= 25
C)
Guaranteed Limits
Symbol Parameter Test
Conditions
Min Max
Unit
I
CC
Current Consumption without
Load
V
S
=8.8 to 26 V
1.8
mA
V
ON
Activiation
Voltage
12.2
13
V
V
ONR
Activiation Voltage Range
R
A
= 1 K
8 10
V
V
SUS
Sustaining
Voltage
8
8.8
V
R
D
Differential Resistance in Off
Condition
V
TIP
= 8.0 V
V
RING
= 0 V
6.4 3500
K
V
OUT
Output Voltage Swing
V
S
= 26 V,
V
SRC
= 8.0 V,
V
OFR
= 8.0 V
21 25.5
V
I
OUT
Short Circuit Current
V
S
= 26 V
30
80
mA
2
IL6840
AC CHARACTERISTICS
Guaranteed Limits
Symbol Parameter
Test
Conditions
Min Max
Unit
f
H1
f
H2
Output Frequencies
f
H1
f
H2
V
CC
= 26 V, R1 = 14 K
V
SCR
= 0 V
V
SCR
= 6 V
1960
1420
2570
1840
Hz
Hz
f
H
Range max
V
CC
= 26 V, R1 = 1.7 K
,
V
SCR
= 0 V
14
KHz
f
H
Range min
V
CC
= 26 V, R1 = 27 K
,
V
SCR
= 6.0 V
0.11
KHz
f
L
Sweep
Frequency
V
CC
= 26 V, C
1
= 100 nF
7.0
13.0
Hz
TEST AND APPLICATION CIRCUIT
Figure1 : Single output applied pin#5
0.22 F
f
1
= 3.22
10
4
/ R
1
(K
); f
2
= 5/7 f
1
; f
sweep
= 1000 / C
1
(nF)
RING
TIP
1 F, 250V
AC
2.2 K
R
2
C
2
10K
10K
10 F
100nF
14K
C
3
C
1
R
1
V
OUT
IL6840
5
6
7
TEL
Piezo
2
3
1
4
1300:8
VS
8
3
IL6840
Figure2 : Single output applied pin#6
1 F, 250V
0.22 F
2.2 K
AC
f
1
= 3.22
10
4
/ R
1
(K
); f
2
= 5/7 f
1
; f
sweep
= 1000 / C
1
(nF)
DESCRIPTION
The IL6840 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.
RING
TIP
R
2
C
2
10K
10K
10 F
3
100nF
14K
C
C
1
R
1
V
OU
T
IL6840
5
6
7
TEL
Piezo
2
3
1
4
1300:8
VS
8
4
IL6840
N SUFFIX PLASTIC DIP
(MS - 001BA)
Symbol
MIN
MAX
A
8.51
10.16
B
6.10
7.11
C
5.33
D
0.36
0.56
F
1.14
1.78
G
H
J
0
10
K
2.92
3.81
NOTES:
L
7.62
8.26
1.
Dimensions "A", "B" do not include mold flash or protrusions.
M
0.20
0.36
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
N
0.38
D SUFFIX SOIC
(MS - 012AA)
Symbol
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
G
H
J
0
8
NOTES:
K
0.10
0.25
1.
Dimensions A and B do not include mold flash or protrusion.
M
0.19
0.25
2.
Maximum mold flash or protrusion 0.15 mm (0.006) per side
P
5.80
6.20
for A; for B 0.25 mm (0.010) per side.
R
0.25
0.50
1.27
5.72
Dimension, mm
Dimension, mm
2.54
7.62
A
B
H
C
K
C M
J
F
M
P
G
D
R x 45
SEATING
PLANE
0.25 (0.010) M T
-T-
1
8
4
5
L
H
M
J
A
B
F
G
D
SEATING
PLANE
N
K
0.25 (0.010) M T
-T-
C
1
8
4
5
5
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