INTEGRAL IL9151-3

TECHNICAL DATA
IL9151-3
PULSE DIALER
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
ORDERING INFORMATION
IL9151-3N
Plastic
TA = -20° to 70° C for package
PIN ASSIGNMENT
LOGIC DIAGRAM
KEYBOARD ASSIGNMENT
R1
R2
R3
R4
PIN 5 = VCC
PIN 12 = GND
1
2
3
4
5
6
7
8
9
*
0
#
C1 C2 C3
(*,# : Redial)
IL9151-3
PIN DESCRIPTION
PIN No.
NAME
1
2
3
4
R1~R4
Key inputs.
14
15
16
C1~C3
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
VCC
GND
Positive power supply input.
Negative power supply input.
6
7
8
CK1,CK,
CK
Oscillator circuit input/output.
DESCRIPTION
The oscillator consists of two inverters, with oscillator frequency controlled by
external RC components:
RCK1=270KΩ, RCK=150KΩ, CCK=150 pF
9
10
__
DP
Dialing pulse output.
M/B
Make/Break ratio select input.
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 FOSC=18KHz in normal mode.
In normal mode, this input is used to select the Make/Break ratio:
when input = VCC , 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
13
__
HK
MUTE
Hook switch input.
This input is used to detect whether the telephone is in the On-Hook or Off-Hook
state:
VCC=on-hook
GND=off-hook.
(Resetting time = 200 ms minimum)
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
VCC
DC Supply Voltage (Referenced to GND)
VIN
DC Input Voltage (Referenced to GND)
PD
Tstg
TL
Value
Unit
-0.3 to +5.5
V
-0.3 to VCC +0.3
V
600
mW
-55 to +150
°C
260
°C
**
Power Dissipation in Still Air , Plastic DIP
Storage Temperature
Lead Temperature, 1mm from case for 10 seconds
*
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 70°C.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
VCC
DC Supply Voltage (Referenced to GND)
VIN
DC Input Voltage (Referenced to GND)
TA
Operating Temperature
Min
Max
Unit
2.0
5.5
V
0
VCC
V
-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, 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.
DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND, VCC = 2.0 V to5.5 V,
TA = -20 to +70°C)
Guaranteed Limits
Symbol
Parameter
Test Conditions
Min
Max
Unit
IMR
Maximum Memory
Retention Current
VCC=1.0 V,
HK=VCC ,all outputs unloaded
1
µA
ICC
Maximum Supply
Operating Current
oscillator running, all outputs
unloaded
200
µA
ISB
Maximum Standby
Current
all outputs unload
HK=VCC
4
µA
IOL
Minimum Output Sink
Current (Mute, DP)
VCC=2.0V, VOUT=0.5V,
f=18KHz
2
mA
IOH
Minimum Output Drive
Current (Mute)
VCC=2.0V,
VOUT=VCC-1V, f=18KHz
1
mA
VIL
Min High-Level Input
Voltage
0.8VCC
VIL
Max Low-Level Input
Voltage
GND
IIN
Max. Input Leakage
Current
VCC=5.5V
VCC
VCC
0.2VCC
±1.0
µA
IL9151-3
AC ELECTRICAL CHARACTERISTICS (FOSC = 18 KHz, VCC=2.0 to 5.5 V, TA=-20 to +70°C )
Symbol
Parameter
Test Conditions
Min.
M/B
DR
TM
TB
TIDP
TPDP
TMDP
TKD
Make/Break
Ratio
Dial Pulse
Rate
Maximum
Make Time
(Figure 3)
Maximum
Break Time
(Figure 3)
Maximum
Inter-digital
Pause Time
(Figure 3)
Maximum
Pre-digital
Pause
(Figure 3)
Maximum
Mute Delay
Time
(Figure 3)
Minimum Key
Debounce Time
M/B=VCC
M/B=GND
FOSC=18KHz
FOSC=36KHz
10pps
10pps
20pps
20pps
10pps
10pps
20pps
20pps
10pps
10pps
20pps
20pps
10pps
10pps
20pps
20pps
10pps
10pps
20pps
20pps
VIN=GND
or VCC
1/2
2/3
1/2
2/3
1/2
2/3
1/2
2/3
1/2
2/3
1/2
2/3
1/2
2/3
1/2
2/3
1/2
2/3
1/2
2/3
30
Guaranteed Limit
Typ.
1/2
2/3
10
20
Unit
Max
pps
33
40
16.6
20
66
60
33
30
800
800
400
400
800
800
400
400
33
40
16.6
20
ms
IL9151-3
Operation Procedures
Symbol Definitions:
DP: pulse digit (0 through 9)
ZiZiZi: conversation
0-0↑: off-hook.
0-0↓: on-hook.
* or # : Redial
Recommended Operations:
Normal Dialing:
0-0↑; DP ... DP; 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 OffHook.)
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
IL9151-3
SWITCHING WAVEFORMS
EXPANDED LOGIC DIAGRAM
IL9151-3
N SUFFIX PLASTIC DIP
(MS - 001BB)
A
Dimension, mm
9
16
Symbol
MIN
MAX
A
18.67
19.69
B
6.1
7.11
B
1
8
5.33
C
F
L
C
D
0.36
0.56
F
1.14
1.78
G
2.54
H
7.62
-T- SEATING
PLANE
N
G
K
M
D
H
0.25 (0.010) M 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.
J
J
0°
10°
K
2.92
3.81
L
7.62
8.26
M
0.2
0.36
N
0.38