IL9151-3 반도체 회로 부품 판매점
Pulse Dialer
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 IK Semiconductor |
TECHNICAL DATA
PULSE DIALER
IL9151-3
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
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LOGIC DIAGRAM
PIN 5 = VCC
PIN 12 = GND
KEYBOARD ASSIGNMENT
R1 1 2 3
R2 4 5 6
R3 7 8 9
R4 * 0 #
C1 C2 C3
(*,# : Redial)
IL9151-3
PIN DESCRIPTION
PIN No. NAME
1 R1~R4
2
3
4
14 C1~C3
15
16
5 VCC
12 GND
6 CK1,CK,
7 CK
8
Key inputs.
DESCRIPTION
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.
Positive power supply input.
Negative power supply input.
Oscillator circuit input/output.
The oscillator consists of two inverters, with oscillator frequency controlled by
external RC components:
RCK1=270KΩ, RCK=150KΩ, CCK=150 pF
9 __ Dialing pulse output.
DP 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.
10 M/B Make/Break ratio select input.
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 __ Hook switch input.
HK 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)
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.
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제조업체: IK Semiconductor
( ik )
IL9151-3 data
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