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Электронный компонент: IL9151-3N

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TECHNICAL DATA
IL9151-3
PULSE DIALER
ORDERING INFORMATION
IL9151-3N Plastic
T
A
= -20
to 70 C for package
The IL9151-3 pulse dialer is a monolithic CMOS integrated circuit which
converts pushbutton inputs to a series of pulses suitable for telephone dialing.
It is intended to replace mechanical telephone dialers and can operate directly
from telephone lines. CMOS technology is used to produced this device,
resulting in very low power requirements and high noise immunity. The
IL9151-3 can be easily interfaced with a variety of telephones, requiring only
a minimal number of external components.
Direct telephone line operation
4 x 3 matrix keyboard interface
Supply voltage range of 2.0 to 5.5 volts
Inexpensive RC oscillator
Low power standby mode for redialing
22-digit redial memory
Redial with either * or # key
Dialer reset for line power breaks > 200 ms
Selectable make/break ratio
High speed test capacity
PIN ASSIGNMENT
KEYBOARD ASSIGNMENT
R1
1 2 3
R2
4 5 6
R3
7 8 9
R4
* 0 #
C1 C2 C3
(*,# : Redial)
LOGIC DIAGRAM
PIN 5 = V
CC
PIN 12 = GND
IL9151-3

PIN DESCRIPTION
PIN No.
NAME
DESCRIPTION
1
2
3
4
14
15
16
R1~R4


C1~C3
Key inputs.

These inputs can be interfaced to either an XY matrix keyboard or a 2 of 7 type
keyboard. The keypad inputs are normally held at high. When a key is depressed,
scanning signals are presented at C1, C2, and C3 inputs; the dialer identifies the
key by examining the R1~R4 inputs. Debouncing is provided to avoid false entry.
5
12
V
CC
GND
Positive power supply input.
Negative power supply input.
6
7
8
CK1,CK,
CK
Oscillator circuit input/output.
The oscillator consists of two inverters, with oscillator frequency controlled by
external RC components:
R
CK1
=270K
, R
CK
=150K
, C
CK
=150 pF
9
__
DP
Dialing pulse output.
This output consists of an N-channel open drain device. Normally this output will
be in off state during make and on during break. Dialing pulse rate = 10pps and
inter-digital pause = 800 ms when F
OSC
=18KHz in normal mode.
10
M/B
Make/Break ratio select input.
In normal mode, this input is used to select the Make/Break ratio:
when input = V
CC
, M/B ratio = 1/2.
when input = GND, M/B ratio = 2/3.
when connected to the clock output (pin 7), this input can trigger the IN9151-3
into test mode, generating high speed dialing.
11
__
HK
Hook switch input.
This input is used to detect whether the telephone is in the On-Hook or Off-Hook
state:
V
CC
=on-hook
GND=off-hook.
(Resetting time = 200 ms minimum)
13 MUTE
Mute
output.
This output is an inverter normally at low state when there is no key entry.
During outdialing it changes to high state and is used to mute the speech network.
IL9151-3
MAXIMUM RATINGS
*
Symbol Parameter
Value
Unit
V
CC
DC Supply Voltage (Referenced to GND)
-0.3 to +5.5
V
V
IN
DC Input Voltage (Referenced to GND)
-0.3 to V
CC
+0.3
V
P
D
Power Dissipation in Still Air , Plastic DIP
**
600 mW
Tstg
Storage Temperature
-55 to +150
C
T
L
Lead Temperature, 1mm from case for 10 seconds
260
C
*
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
**
Durating: -10
mW
/
C
from 65
C to 70C.
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min
Max
Unit
V
CC
DC Supply Voltage (Referenced to GND)
2.0
5.5
V
V
IN
DC Input Voltage (Referenced to GND)
0
V
CC
V
T
A
Operating Temperature
-10
+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.
DC ELECTRICAL CHARACTERISTICS
(Voltages Referenced to GND, V
CC
= 2.0 V to5.5 V,
T
A
= -20 to +70
C)
Guaranteed
Limits
Symbol Parameter
Test
Conditions Min
Max
Unit
I
MR
Maximum Memory
Retention Current
V
CC
=1.0 V,
HK=V
CC
,all outputs unloaded
1
A
I
CC
Maximum Supply
Operating Current
oscillator running, all outputs
unloaded
200
A
I
SB
Maximum Standby
Current
all outputs unload
HK=V
CC
4
A
I
OL
Minimum Output Sink
Current (Mute, DP)
V
CC
=2.0V, V
OUT
=0.5V,
f=18KHz
2
mA
I
OH
Minimum Output Drive
Current (Mute)
V
CC
=2.0V,
V
OUT
=V
CC
-1V, f=18KHz
1
mA
V
IL
Min High-Level Input
Voltage
0.8V
CC
V
CC
V
CC
V
IL
Max Low-Level Input
Voltage
GND
0.2V
CC
I
IN
Max. Input Leakage
Current
V
CC
=5.5V
1.0
A
IL9151-3




AC ELECTRICAL CHARACTERISTICS
(F
OSC
= 18 KHz, V
CC
=2.0 to 5.5 V, T
A
=-20 to +70
C )
Symbol
Parameter
Test Conditions
Guaranteed Limit
Unit
Min. Typ. Max
M/B Make/Break
M/B=V
CC
1/2
Ratio
M/B=GND
2/3
DR Dial
Pulse
F
OSC
=18KHz 10
pps
Rate
F
OSC
=36KHz 20
Maximum
10pps
1/2
33
T
M
Make Time
10pps
2/3
40
ms
(Figure
3)
20pps
1/2
16.6
20pps
2/3
20
Maximum
10pps
1/2
66
T
B
Break Time
10pps
2/3
60
(Figure
3)
20pps
1/2
33
20pps
2/3
30
Maximum
10pps
1/2
800
T
IDP
Inter-digital
10pps
2/3
800
Pause
Time
20pps
1/2
400
(Figure
3)
20pps
2/3
400
Maximum
10pps
1/2
800
T
PDP
Pre-digital 10pps
2/3
800
Pause
20pps
1/2
400
(Figure
3)
20pps
2/3
400
Maximum
10pps
1/2
33
T
MDP
Mute Delay
10pps
2/3
40
Time
20pps
1/2
16.6
(Figure
3)
20pps
2/3
20
T
KD
Minimum Key
Debounce Time
V
IN
=GND
or V
CC
30
IL9151-3



Operation Procedures
Symbol Definitions:
D
P
: pulse digit (0 through 9)
ZiZiZi: conversation
0-0
: off-hook.
0-0
: on-hook.
* or # : Redial

Recommended Operations:
Normal Dialing:
0-0
; D
P
... D
P
; ZiZiZi; 0-0
Dial pulse begins as soon as first key is entered.
Debounced and detected on chip.
Redialing:
0-0
; * or # key
(* or # key can be accepted as first key entry after Off-
Hook.)
Functional Description
1) N-channel open drain output - DP (Figure 1).
2) Clock oscillator
The clock oscillator consists of two inverters, with the
frequency of oscillation controlled by external
components connected to pins 6,7, and 8. The circuit is
sufficiently versatile to allow the use of a variety of
external component configurations. The oscillator
circuit is shown in figure 2.

Figure 1
Figure 2