TECHNICAL DATA
IL91214A/B
Tone/Pulse Dialer with Flash Function
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
ORDERING INFORMATION
IL91214A/BN Plastic
IL91214A/BD SOIC
T
A
= -20° to 70° C for all packages
R1
KEYBOARD
LOGIC
R4
C1
C3
REDIAL MEMORY
32 DIGITS
OUTPUT
LOGIC
DP
KT
XMIT MUTE
MODE OUT
V
DD
DTMF
GENERATOR
TONE
MODE IN
HK
OSCI
OSCO
INPUT
LOGIC
CONTROL
LOGIC
OSC.
Fig. 1. Block diagram.
IL91214 A, IL91214B
PIN DESCRIPITION
Pin #
HK
M O D E IN
01
02
16
15
R4
R3
R2
R1
C3
C2
C1
DP
A
B
Designation
HK
MODE IN
Description
Hook switch input
MODE IN = V
DD
: pulse mode, 10 Hz,
М/В
= 1/2,
MODE IN = V
SS
: tone mode,
MODE IN = floating mode,
20 Hz,
М/В
= 1/2
Oscillator input
Oscillator output
Ground
Supply output
Tone dialing output
Dialing transmission mute output
Mode output pin
Key-in tone output
Dialing pulse output
Keyboard column input
Keyboard column input
Keyboard column input
Keyboard row input
Keyboard row input
Keyboard row input
Keyboard row input
O SCI
03
O SCO
04
IL91214A
1
2
1
2
14
13
12
11
Vss
05
Vdd
06
TO NE
07
X M IT M U T E
10
09
08
3
4
5
6
7
8
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
HK
01
MODE IN
02
OSCI
03
OSCO
04
Vss
05
Vdd
06
TONE
07
18
17
16
R4
R3
R2
R1
C3
C2
C1
DP
KT
15
14
13
12
11
10
XMIT MUTE
08
MODE OUT
09
9
10
11
12
13
14
15
16
OSCI
OSCO
V
SS
V
DD
TONE
XMIT
MUTE
MODE OUT
KT
DP
C1
C2
C3
R1
R2
R3
R4
Keyboard Assignment
1
4
7
*/T
2
5
8
0
3
6
9
#
F1
F2
P
RD
IL91214B
R1
R2
R3
R4
C1
C2
C3
C4
1. */T – At Pulse mode this key works as Pulse -> DTMF key (T key), at DTMF mode the key works as *key. */T key
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
Parameter
Supply voltage, V
Memory retention voltage, V
Memory retention current,
uА
Operation current,
мА
Standby current, uА
Input voltage, V
Input current
R1-R4, uА
Tone out voltage,
мV
(V
DD
= 3.5 V, V
SS
= 0 V, F
OSC
= 3.579
МHz,
T = 25
O
C, unless otherwise specified)
Symbol
V
DD
V
MR
* I
MR
I
DDP
I
DDT
* I
SO
V
IH
V
IL
I
R
V
OC
V
OR
584
456
0.8 V
DD
0
115
730
570
5.3
5.3
1
5
876
684
Column
Row
V
DD
=3.5V
R
L
=5К
Min.
2.0
2.0
1
0.05
0.32
0.6
0.03
0.5
Typ
Max.
5.5
5.5
0.4
1.0
2.0
0.05
10
V
DD
0.2 V
DD
Condition
Pulse mode
Tone mode
V
DD
= 1.0 V
HK = V
DD
All outputs
unloaded
Pulse
Tone
HK=V
D
All outputs unloaded.
No key selected.
D
НК=V
SS
V
DD
=1.5V
V
DD
= 3.5 V
Sink current
0.9
I
OL1
XMUTE,
мА
Sink current
1.1
I
OL2
DP,
мА
Distortion, %
DIS %
* - in this mode IC functioning is not guaranteed.
V
DD
=3.5V, V
OL
=0.4V
V
DD
=3.5V, V
OL
=0.4V
IL91214 A, IL91214B
AC characteristics
(V
DD
= 3.5 V, V
SS
= 0 V, F
OSC
= 3.579
МHz,
T = 25
O
C, unless otherwise specified)
Parameter
Make time,
мs
Break time,
мs
Inter-digit pause time,
мs
Pause time, s
Auto-redial break time, s
Symbol
T
M
Т
В
T
IDP
T
PAU
T
AOBK
Min.
Typ
33.3
16.7
66.6
33.3
824
458
2.2
2.2
Max.
Condition
Dialing speed,
pps
10
M/B=1/2
20
10
20
10 pps
20 pps
M/B=1/2
M/B=1/2
M/B=1/2
Delay time key valid to signal out,
мs
Key-in debounce,
мs
Key-in tone duration,
мs
Key-in tone frequency, Hz
Minimal tone duration time,
мs
Minimum tone inter-digit pause,
мs
Redial tone duration,
мs
Redial tone inter-digit duration,
мs
T
D
T
KD
T
KTD
F
KT
T
MFD
T
TIDP
T
MFDR
T
TIDPR
0
21
23
437
94
96
94
96
Values of generated frequencies
R/C
Frequency
697
770
852
941
1.209
1.336
1.477
Error, %
+ 0.31
+ 0.19
+ 0.03
+ 0.10
+ 0.57
- 0.32
- 0.35
Unit
Hz
Hz
Hz
Hz
Hz
Hz
Hz
FOSC = 3.579
МHz
Conditions
R1
R2
R3
R4
С1
С2
С3
Absolute maximum ratings
Parameter
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
Absolute maximum value
≤
6.0V
V
SS
-0.3V ~ V
DD
+0.3V
V
SS
-0.3V ~ V
DD
+0.3V
≤1.2V
≤
50
мА
≤
500
мW
-40
О
С
~ +125
О
С
京公网安备 11010802033920号
EEWORLD
