TECHNICAL DATA
IL91350A
13 Memory Tone/Pulse Dialer with
Handfree and Hold Function
The IL91350A is a silicon CMOS IC that provide necessary signal for
either Pulse or Tone dialing. It features Handfree dialing, Hold, and 13
by 16 digits automatic dialing memory.
•
DTMF/PULSE switchable dialer
•
32 digits for Redial memory
•
Three by 16 digits for one touch direct repertory
•
Ten by 16 digits for two touch indirect repertory
•
Mix dialing is allowable, and the dialing length is unlimited
•
Pulse to Tone (*/T) keypad for Long Distance Call operation
•
Easy operation with Redial, Flash, Pause and */T keypads
•
Pause, P- - >T (Pulse to Tone) can be stored as a digit in memory
•
Flash time 600 mS
•
4 x 5 keyboard can be used
•
Power on reset on chip
•
Use 3.579545 MHz crystal or ceramic resonator
•
Dial Pulse Rate: 10 pps
ORDERING INFORMATION
IL91350AN Plastic DIP
IL91350AD Plastic SOIC
T
A
= -20° to 70° C
PIN ASSIGNMENT
IL91350A
LOGIC DIAGRAM
PIN 6= GND
PIN 16 = V
CC
Keyboard Assignments
1
4
7
*/T
2
5
8
0
3
6
9
#
ST
F
A
R/P
M1
M2
M3
H
R1
R2
R3
R4
C1
C2
C3
C4
C5
Notes:
1. M1
∼
M3 - One touch memory. The dialing number can be stored in M1
∼
M3 location by STORE key.
2. ST - Store function key.
3. H - Hold function key.
4. F - Flash key.
Flash key can not be stored in memory.
5. */T - In the Pulse mode this key works as Pulse - - >Tone key, and it works as * key in the tone mode.
*/T key can be stored as a digit in Pulse or Tone mode.
6. R/P - Redial and Pause function key.
The Redial function can be executed only in first key-in after OFF HOOK, otherwise will be operated as Pause
function.
7. A - Indirect repertory dialing function key.
IL91350A
Pin Description
Pin No.
1-4
17 - 20
5
Designation
Column-Row
Inputs
H/P MUTE
Description
The Keyboard input may be used with the standard 4 x 5 keyboard.
A valid key entry is defined by a single row being connected to a single
column.
The H/P MUTE is a conventional inverter output.
In pulse dialing, flash and hold period, the output will be at active high,
otherwise, it will keep at low state.
Power supply pins.
This device is designed to operate from 2.0 V to 5.5 V.
A built in inverter provides oscillation with an inexpensive 3.579545 MHz
crystal or ceramic resonator.
The oscillator output pin.
The T/P MUTE is a conventional CMOS N-channel open drain output.
The output transistor is switched on during Pulse and Tone mode dialing
sequence and Flash break. Ohterwise, it is switched off.
Handfree control pins.
When HFI input pin has a low pulse, the handfree control state is toggled
on.
Status of the handfree control state is listed in the following table:
CURRENT STATE
Hook SW.
HFO
X
Low
On Hook
High
Off Hook
High
On Hook
X
Off Hook
Low
Off Hook
High
NEXT STATE
Input
HFO
Dialing?
HFI
High
Yes
HFI
Low
No
HFI
Low
Yes
Off Hook
Low
Yes
On Hook
Low
No
On Hook
High
Yes
6
16
7
8
9
GND
V
CC
XT
XT
T/P MUTE
10, 11
HFI, HF0
HFI pin is pulled to V
CC
by internal resistor.
X = don’t care.
12
HKS
This pin is the hook switch input.
HKS = H, ON HOOK state, chip in sleeping mode, no operation.
HKS = L, OFF HOOK state, enable chip on normal operation.
This pin must combine to HFI, HFO to perform the above function.
Please refer to HFI, HFO pin.
HKS pin is pulled to V
CC
by internal resistor.
Open drain dialing pulse output.
Flash key will cause DP active either in Tone mode or Pulse mode.
In pulse mode, it always keeps at low state.
In tone mode, it will output a dual or single tone.
Pull mode pin to GND; the dialer is in Tone mode.
Pull mode pin to V
CC
; the dialer is in Pulse mode - 10 pps, M/B=2/3.
Pull mode pin to floating; the dialer is in Pulse mode - 10 pps, M/B=1/2.
13
14
15
DP/C5
DTMF
MODE
IL91350A
Operation Procedures
:
Symbol Definitions
In the description below, signals are defined in terms
of the key or switch which is activated.
means the phone was taken off
Off Hook
the hook.
means that the receiver is on the
On Hook
hook.
D1 or L1 stands for the first digit dialed
in a string of digits.
Dn or
Ln stands for the last digit dialed
in a string of digits.
stands for the beginning of a new
Dn+1
string of digits.
stands for the last digit in a new
Dn+m
string of digits.
Input Level from High to Low.
Mn=M1∼M3; Ln=0∼9; Dn=0∼9,*,#,Pause.
1. Normal Dialing
Off Hook (or On Hook & HFI
2.
Off Hook (or On Hook & HFI
ST , D1 , D2
On Hook (or On Hook & HFI
),
)
,..., Dn , ST , Mn or Ln
a.D1, D2, ... , Dn will be stored in Mn or Ln memory
location but they will not be dialed out.
b. R/P and */T keys can be stored as a digit in
memory. In store mode, R/P in the pause function
key.
c.The store mode can be release after the store
function is executed or the present state of hook
switch is changed.
4. Repertory Dialing
1. Off Hook (or On Hook & HFI
2.
Off Hook (or On Hook & HFI
Ln
5. Access Pause
Off Hook (or On Hook & HFI
) Mn
)A ,
),
D1 , D2 , ... , Dn
1.D1, D2, ... , Dn will be dialed out.
2.Dialing length is unlimited, but the Redial is
inhibited if it oversteps 32 digits.
2. Redialing
Off Hook , D1 , D2
HFI
HFI
HFI
),
R/P
(or
),
, .. , Dn , BUSY,
On Hook
, R/P
&
D1 , D2 , R/P , D3 , ... , Dn
1.The Pause function can be stored in memory.
2.The Pause function is executed in normal dialing or
Redialing or memory dialing.
6. Pulse to Tone (*/T)
Off Hook (or On Hook & HFI
D1 ,
D2
, ... ,
Dn , */T ,
Come On Hook , Off Hook (or On Hook &
, D1 , D2 , ... , Dn ,BUSY,
,Come HFI
),
The R/P key can execute Redial function only in
first key-in after Off Hook, otherwise it will be
Pause function.
3. Number store
1. Off Hook (or On Hook & HFI
On Hook (or On Hook & HFI
),
)
D1 , D2 ,..., Dn , ST , ST , Mn or Ln
a.The dialing of D1, D2, ... , Dn must have finished,
then ST key may be pressed.
b.D1, D2, ... , Dn will be stored in Mn or Ln memory
location and they will be dialed out.
Dn+1 , Dn+2 , ... , Dn+m
1.If the mode switch is set in Pulse mode, then the
output signal will be:
D1, D2, ... , Dn, Pause
(Pulse)
Dn+1, Dn+2, ... , Dn+m
(Tone)
2.If the mode switch is set in Tone mode, then the
output signal will be:
D1, D2, ... , Dn,
(Tone)
, * , Dn+1, Dn+2, ... , Dn+m
(Tone)
(Tone)
3.It can be reset to Pulse mode only in operation of
On Hook, because it’s still in Tone mode when the
digits have been dialed out.
IL91350A
7. Flash
Off Hook (or On Hook & HFI
) F
2.
Repertory dialing
+
+
Normal dialing
1.Flash key can not be stored as a digit in memory and
it has the first priority of the keyboard function.
2.The system will return to the initial state after the
break time is finished.
8. Mix Dialing
Off Hook (or On Hook & HFI
1.
Normal dialing
+
+
Repertory dialing
Redialing
+
Normal dialing
3.
)
+
Repertory dialing
a.Redialing and Save dialing are valid just for first key
in.
b.The second sequence should not be operated until
the first sequence is dialed out completely.
Repertory dialing
Normal dialing
MAXIMUM RATINGS
*
Symbol
V
CC
V
IN
V
OUT
P
D
Tstg
*
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
Power Dissipation in Still Air,
Storage Temperature
Plastic DIP
**
Plastic SOIC
**
Value
-0.3 to +7.0
-0.3 to V
CC
+0.3
-0.3 to V
CC
+0.3
500
250
-55 to +150
Unit
V
V
V
mW
°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 70°C.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
IN
V
OUT
T
A
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
Operating Temperature
Min
2.0
0
0
-20
Max
5.5
V
CC
V
CC
+70
Unit
V
V
V
°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.
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