TECHNICAL DATA
1
13 Memory Tone/Pulse Dialer with
Handfree and Hold Function
The IN91350A 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
IN91350A
ORDERING INFORMATION
IN91350AN
T
A
= -20
to 70
C
PIN ASSIGNMENT
IN91350A
2
LOGIC DIAGRAM
PIN 6= GND
PIN 16 = V
CC
Keyboard Assignments
1
2
3
ST
M1
R1
4
5
6
F
M2
R2
7
8
9
A
M3
R3
*/T
0
#
R/P
H
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.
IN91350A
3
Pin Description
Pin No.
Designation
Description
1 - 4
17 - 20
Column-Row
Inputs
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.
5
H/P MUTE
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.
6
GND
16
V
CC
7
XT
A built in inverter provides oscillation with an inexpensive 3.579545 MHz
crystal or ceramic resonator.
8
XT
The oscillator output pin.
9
T/P MUTE
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.
10, 11
HFI, HF0
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
NEXT STATE
Hook SW.
HFO
Input
HFO
Dialing?
X
Low
HFI
High
Yes
On Hook
High
HFI
Low
No
Off Hook
High
HFI
Low
Yes
On Hook
X
Off Hook
Low
Yes
Off Hook
Low
On Hook
Low
No
Off Hook
High
On Hook
High
Yes
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.
13
DP/C5
Open drain dialing pulse output.
Flash key will cause DP active either in Tone mode or Pulse mode.
14
DTMF
In pulse mode, it always keeps at low state.
In tone mode, it will output a dual or single tone.
15
MODE
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.
Power supply pins.
This device is designed to operate from 2.0 V to 5.5 V.
IN91350A
4
Operation Procedures
:
Symbol Definitions
In the description below, signals are defined in
terms of the key or switch which is activated.
Off Hook
means the phone was taken off
the hook.
On Hook
means that the receiver is on the
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.
Dn+1
stands for the beginning of a new
string of digits.
Dn+m
stands for the last digit in a new 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
),
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
, .. , Dn , BUSY,
Come On Hook , Off Hook (or On Hook &
HFI
), R/P
(or
On Hook
&
HFI
, D1 , D2 , ... , Dn ,BUSY,
HFI
,Come HFI
, R/P
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
),
D1 , D2 ,..., Dn , ST , ST , Mn or Ln
On Hook (or On Hook & HFI
)
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.
2.
Off Hook (or On Hook & HFI
),
ST , D1 , D2 ,..., Dn , ST , Mn or Ln
On Hook (or On Hook & HFI
)
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
) Mn
2.
Off Hook (or On Hook & HFI
) A ,
Ln
5. Access Pause
Off Hook (or On Hook & HFI
),
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 ,
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.
IN91350A
2
7. Flash
Off Hook (or On Hook & HFI
) F
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
+
Normal dialing
2. Repertory dialing +
Normal dialing
+
Repertory dialing
3.
Redialing
+
Normal dialing
+
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.
MAXIMUM RATINGS
*
Symbol
Parameter
Value
Unit
V
CC
DC Supply Voltage (Referenced to GND)
-0.3 to +7.0
V
V
IN
DC Input Voltage (Referenced to GND)
-0.3 to V
CC
+0.3
V
V
OUT
DC Output Voltage (Referenced to GND)
-0.3 to V
CC
+0.3
V
P
D
Power Dissipation in Still Air,
Plastic DIP
**
500
mW
Tstg
Storage Temperature
-55 to +150
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
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
V
OUT
DC Output Voltage (Referenced to GND)
0
V
CC
V
T
A
Operating Temperature
-20
+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.
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