KSI-W012-001
1
SL5001P/2P
TONE RINGER
Description
The oscillator frequencies can be adjusted over a wide range by selection of external
components
Features
Designed telephone bell replacement
Adjustable 2-frequency tone
Low current drain
Built-in hysteresis prevents false triggering and rotary dial "Chirp"
External triggering ringer disable(5001P)
Adjustable for reduced supply initiation current(5002P)
Applications
Telephone tone ringers
Alarms or other alerting devices
Extension tone ringer modules
Ordering
Information
Type NO.
Marking
Package Code
SL5001P SL5001
DIP8
SL5002P SL5002
DIP8
Outline Dimensions unit :
mm
S
S
e
e
m
m
i
i
c
c
o
o
n
n
d
d
u
u
c
c
t
t
o
o
r
r
KSI-W012-001
2
Absolute Maximum Ratings
(Ta = 25
C)
Characteristic Symbol
Rating
Unit
Supply Voltage
V
CC
30 V
Power Dissipation
P
D
400
mW
Operating Temperature
T
opr
-45+65
C
Storage Temperature
T
stg
-65+150
C
Block Diagram
Electrical Characteristics
(Unless otherwise specified, Ta = 25
C)
Characteristic Symbol
Test
Condition
Min.
Typ.
Max.
Unit
Operating Supply Voltage
V
CC
- -
-
29
V
Initiation Supply Voltage
V
CC(INI)
Trigger-In Open,
No Load
17 19 21 V
Sustaining Voltage
V
SUS
Trigger-In Open,
No Load
9.7 11 13 V
Initiation Supply Current
I
CC(INI)
R
SL
= 6.8K(5002P)
0.8 2.5 4.2 mA
Sustaining Current
I
SUS
V
CC
=V
SUS
, No Load
0.7
1.2
-
mA
Trigger Voltage
V
TR
5001P
10.5
11 - V
Trigger Current
I
TR
5001P
10 20
1000 A
Disable Voltage
V
DIS
5001P
- 0.4 0.8 V
Disable Current
I
DIS
5001P
-40 -50 - A
Output Voltage
V
OUT
V
CC
=21V, No Load
17
19
21
V
Oscillator Frequency Tolerance
f
O
- -
-
7
%
SL5001P/2P
8
1
2
3
4
5
6
7
R E G ULA T O R W I T H
HY S T E R E S I S
A M P
HF O
LF O
O S C1
I n p u t
O S C1
O u t p u t
O S C 2
I n p u t
O S C2
O u t p u t
G ND
O u t p u t
T r i g g e r -I n
LF O : Lo w F r e q u e n c y O S C.
HF O : Hi g h F r e q u e n c y O S C.
P i n 3,4 : Lo w F r e q u e n c y T i me Co n s t a n t
P i n 6,7 : Hi g h F r e q u e n c y T i me Co n s t a n t
* R e g u l a t o r c i r c u i t h a s b u i l t -i n h y s t e r e s i s t o p r e v e n t f a l s e
t r i g g e r i n g a n d r o t a r y d i a l "Ch i r p s "
V
CC
KSI-W012-001
3
Electrical Characteristics (continued)
1.Initiation supply voltage V
CC(INI)
must be exceeded to trigger oscillation.
2.Sustaining voltage (V
SUS
) is the supply voltage required to maintain oscillation.
3.Trigger voltage (V
TR
) and trigger current(I
TR
) are the conditions applied to trigger in to
start oscillation for V
SUS
V
CC
V
CC(INI)
.
4.Disable voltage (V
DIS
) and disable current(I
DIS
) are the conditions applied to trigger in
to inhibit oscillation for V
CC(INI)
< V
CC
5.Trigger current must be limited to this value externally.
6.Oscillator frequencies are given by equations :
f
L
= 1/(1.234RC) where R is the resistance connected between pins 3 and 4, and C is
the capacitance connected between pin 3 and ground.
f
H1
= 1/(1.515RC) where R is the resistance connected between pins 6 and 7, and C is
capacitance connected between pin 6 and ground.
Norminal rate (f
HA
) is the HFO when the output of LFO is high
f
H2
= 1.25f
H1
, higher rate(f
H2
) is the HFO when the output of LFO is low.
Typical Performance Characteristics
SL5001P/2P
I c c - V c c
S u p p l y V o l t a g e V c c (V )
S
u
p
p
l
y
C
u
r
r
ent
I
c
c
(m
A
)
2
6
10
14 18
22 26
30 34
0.5
1.0
1.5
2.0
2.5
3.0
3.5
No Lo a d
5001
Lo a d C u r r e n t I
L
(mA r ms )
Lo
a
d
V
o
l
t
a
g
e
V
L
(
Vr
m
s
)
V
L
- I
L
0
10
30
40
20
2
4
6
8
10
V c c =21V
V c c =15V
5001
I c c - V c c
S u p p l y V o l t a g e V c c (V )
S
u
p
p
l
y
C
u
r
r
en
t
I
c
c
(mA
)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
2
6
10 14 18 22 26 30 34
5002
A :R
S L
< 6.8K
B:R
S L
= 6.8K
C :R
S L
> 6.8K
I c c
( I N I )
- R
S L
R e s i s t a n c e R
S L
(K)
S
u
p
p
l
y
I
ni
t
i
a
t
i
o
n
C
u
r
r
e
n
t
I
c
c
(I
N
I
)
(
m
A
)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
2
4
6
8
10
12 14
16
18
5002
C
B
A
KSI-W012-001
4
Application Circuit And Information
1.Typical Tone Ringer
The AC ringing voltage appears across the TIP and RING inputs of the circuit and is
attenuated by capacitor(C
1
) and resistor (R
1
). C
1
also provides isolation from DC
voltages(48V) on the line. After full wave rectification by the bridge, the waveform is
filtered by capacitor(C
4
) to provide a DC supply for Tone Ringer chip. As this voltage
exceeds the initiation voltage V
CC(INI)
oscillation starts. With the components shown, the
output frequency chops between f
H1
and f
H2
at a f
L
rate. The loudspeaker load is coupled
through a 1300 to 8 transformer. To prevent DC power supply regulation problems due
to high source impedance of the telephone line and coupling components C
1
and R
1
, while
the output impedance of the 5001P circuit is quite low, the load impedance must be kept
fairly high. The output coupling capacitor (C
5
) is required with transformer coupled loads.
The variable resistor (R
6
) is used to adjust the audio amplitude and resistor (R
4
) is a
current limiting resistor. Resistor R
5
is a quenching resistor used to limit back emf
generated by the inductive load when ringing stops. When driving a piezo-ceramic
transducer type load, the coupling capacitor (C
5
) is not required. However, a current
limiting resistor is required as is a 29V zener diode in parallel with the transducer. This
diode limits the voltage transients than can be generated by mechanical shocking of piezo-
ceramic transducer.
In the 5002P circuit, the initiation supply current I
CC(INI)
can be changed by using external
resistor(R
SL
). The resistor (R
SL
) is connected to GND from pin2. As this initiation voltage
remains constant independent of R
SL
, the supply initiation current f
CC(INI)
varies inversely
with R
SL
. Thus, increasing the value of R
SL
will decrease the amount of AC ringing current
required to trigger the device. R
SL
can also be used to compensated for smaller AC line
SL5001P/2P
DBL5001
1
8
2
7
3
6
4
5
165K
C5
R4
510
R3
C3
R5
R2
S P
191K 0.0068u F
10K
R6
R
E
R
SL
D1
C4
C2
15K
0.22u F
0.047u F
10u F
29V
TIP
1u F
2K
RING
5001
5002
1300 : 8
SL5001P
SL5002P
KSI-W012-001
5
Application Circuit And Information (continued)
coupling capacitors which can be used to alter the ringer equivalence number of a tone
ringer circuit I
CC
-V
CC
(5002P) graph in typical performance characteristic illustrates the
variation of supply current with supply voltage. Curve B(RSL=6.8k) shows the I
CC
-V
CC
characteristic for 5001P circuit Tone Ringer. Curve A is a plot with R
SL
< 6.8 K and shows
a increase in the current drawn up to the initiation voltage V
CC(INI).
The I
CC
-V
CC
characteristic
after initiation remains unchanged. Curve C shows the effect of increasing RSL above 6.8 K
. Initiation current decreases but again current after triggering is unchanged.
2. Pin 2 Input Equivalent Circuit(5001P)
Usually pin 2 is used at an open state, but in the 5001P circuit the trigger in terminal may
be used to externally trigger oscillation for voltage in the range V
SUS
V
CC
V
CC(INI)
or
disable ringer operation. The ringer circuit can only oscillate when Q
1
and Q
2
are conducting.
Normally when supply voltage V
CC
exceeds the supply initiation voltage V
CC(INI)
base Current
flows into Q
1
via D
1
causing Q
1
and Q
2
conduct. This continues until V
CC
is taken below the
minimum sustaining voltage (V
SUS
).
SL5001P/2P
D
1
D
2
P I N2
R
1
Q
1
Q
2
300K
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