TECHNICAL DATA
IL91214A/B
Tone/Pulse Dialer with Flash Function
ORDERING INFORMATION
IL91214A/BN Plastic
IL91214A/BD SOIC
T
A
= -20
to 70 C for all packages
IL91214A and IL91214B are tone/pulse dialers designed for
providing standard DTMF or pulse signals. The ICs enable to:
-
generate standard DTMF or pulse signals of dialing as
well as "flash" pulses;
-
store and redial last number;
-
generate pause in the transmitted package of dial signals;
ICs are designed to be used in telephone sets.
D SUFFIX
SOIC
R1
R4
C1
C3
KEYBOARD
LOGIC
REDIAL MEMORY
32 DIGITS
DP
KT
XMIT MUTE
MODE OUT
OUTPUT
LOGIC
OSCI
OSCO
OSC.
CONTROL
LOGIC
MODE IN
HK
INPUT
LOGIC
DTMF
GENERATOR
V
DD
TONE
Fig. 1. Block diagram.
IL91214 A, IL91214B
PIN DESCRIPITION
Pin #
A B
Designation
Description
1 1
HK
Hook switch input
2 2
MODE IN
MODE IN = V
DD
: pulse mode, 10 Hz,
/ = 1/2,
MODE IN = V
SS
: tone mode,
MODE IN = floating mode,
20
Hz,
/ = 1/2
3 3
OSCI
Oscillator input
4 4
OSCO
Oscillator output
5 5
V
SS
Ground
6 6
V
DD
Supply output
7 7
TONE
Tone dialing output
8 8
XMIT
MUTE
Dialing transmission mute output
9
MODE OUT Mode output pin
10
KT
Key-in tone output
9 11
DP
Dialing pulse output
10
12
C1
Keyboard column input
11
13
C2
Keyboard column input
12
14
C3
Keyboard column input
13
15
R1
Keyboard row input
14
16
R2
Keyboard row input
15
17
R3
Keyboard row input
16
18
R4
Keyboard row input
Keyboard Assignment
R 4
H K
M O D E IN
O S C I
O S C O
X M IT M U T E
R 3
R 2
R 1
C 3
C 2
C 1
D P
0 1
0 2
0 3
0 4
0 5
0 6
1 1
1 2
1 3
0 7
0 8
V s s
V d d
T O N E
0 9
1 0
1 4
1 5
1 6
R4
HK
MODE IN
OSCI
OSCO
XMIT MUTE
R3
R2
R1
C3
C2
C1
DP
01
02
03
04
05
06
12
13
14
07
08
Vss
Vdd
TONE
09
10
11
15
16
17
18
MODE OUT
KT
IL91214B
IL91214A
1. */T - At Pulse mode this key works as Pulse -> DTMF key (T key), at DTMF mode the key works as *key. */T key
R4
R3
R2
RD
#
0
*/T
P
9
8
7
F2
6
5
4
F1
3
2
1
C1
C2
C3
C4
R1
will occupy one memory digit in either use.
2. F1 - Flash key. The break time is 297ms
3. F2 - Flash key for break time 640ms
4. P - Pause key (2.2 seconds)
5. RD - One key redial key
6. # - At pulse mode this key input is neglected, at DTMF mode this key works as # key.
IL91214 A, IL91214B
DC electrical characteristics
(V
DD
= 3.5 V, V
SS
= 0 V, F
OSC
= 3.579 Hz, T = 25
O
C, unless otherwise specified)
Parameter Symbol
Min.
Typ
Max.
Condition
2.0 5.5
Pulse
mode
Supply voltage, V
V
DD
2.0 5.5
Tone
mode
Memory retention voltage, V
V
MR
1
Memory retention current,
u
* I
MR
0.05
0.4
V
DD
= 1.0 V
HK = V
DD
I
DDP
0.32
1.0
Pulse
Operation current,
I
DDT
0.6
2.0 Tone
All outputs
unloaded
0.03
0.05
HK=V
D
D
Standby current, u *
I
SO
0.5 10
=V
SS
All outputs unloaded.
No key selected.
V
DD
=1.5V
V
IH
0.8 V
DD
V
DD
Input voltage, V
V
IL
0
0.2
V
DD
V
DD
= 3.5 V
Input current
R1-R4, u
I
R
115
V
OC
584 730 876
Column
Tone out voltage, V
V
OR
456 570 684
Row
V
DD
=3.5V
R
L
=5
Sink current
XMUTE,
I
OL1
0.9 5.3
V
DD
=3.5V, V
OL
=0.4V
Sink current
DP,
I
OL2
1.1 5.3
V
DD
=3.5V, V
OL
=0.4V
Distortion, %
DIS %
1
5
* - in this mode IC functioning is not guaranteed.
IL91214 A, IL91214B
AC characteristics
(V
DD
= 3.5 V, V
SS
= 0 V, F
OSC
= 3.579 Hz, T = 25
O
C, unless otherwise specified)
Condition
Parameter Symbol
Min.
Typ
Max.
Dialing speed,
pps
33.3
10
M/B=1/2
Make time, s T
M
16.7
20
M/B=1/2
66.6
10
M/B=1/2
Break time, s
33.3
20
M/B=1/2
824
10
pps
Inter-digit pause time, s T
IDP
458
20
pps
Pause time, s
T
PAU
2.2
Auto-redial break time, s
T
AOBK
2.2
Delay time key valid to signal out,
s
T
D
0
Key-in debounce, s T
KD
21
Key-in tone duration, s T
KTD
23
Key-in tone frequency, Hz
F
KT
437
Minimal tone duration time, s T
MFD
94
Minimum tone inter-digit pause, s T
TIDP
96
Redial tone duration, s T
MFDR
94
Redial tone inter-digit duration, s T
TIDPR
96
Values of generated frequencies
R/C
Frequency
Error, %
Unit
Conditions
R1
697 +
0.31 Hz
R2
770 +
0.19 Hz
R3
852 +
0.03 Hz
R4
941 +
0.10 Hz
1
1.209 +
0.57
Hz
2
1.336 -
0.32
Hz
3
1.477 -
0.35
Hz
FOSC = 3.579 Hz
Absolute maximum ratings
Parameter
Absolute maximum value
Supply voltage
Input voltage
Output voltage
Output voltage
(DP, XMIT MUTE).
Tone output current
Power dissipation
Storage temperature
V
DD
V
IN
V
OUT
V
OUT
I
TONE
P
D
T
STG
6.0V
V
SS
-0.3V ~ V
DD
+0.3V
V
SS
-0.3V ~ V
DD
+0.3V
1.2V
50
500 W
-40
~ +125
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