Silan
Semiconductors
TONE / PULSE DIALER WITH
REDIAL FUNCTION
DESCRIPTION
SC91310 Series
The SC91310 series are monolithic ICs that provide the necessary
signals for either pulse or tone dialing. The SC91310 series feature a
redial memory.
FEATURES
*DTMF / Pulse switchable dialer
*32 digits for redial memory
*pulse-to-tone (P→T) keypad for long distance call operation
*Break / Make ratio is selectable by pin option
*Uses 4x4 keyboard
*Easy operation with redial, flash, pause, and P→T keypads
*Flash, pause, P→T (pulse-to tone) can be stored as a digit in
memory
*Minimum tone output duration:100ms
*minimum intertone pause: 100ms
*On-chip power-on reset
*Uses 3.579545 MHz crystal or ceramic resonator
*Packaged in 18-pin plastic DIP
DIP-18
ORDERING INFORMATION
(The different dialers in the SC91310 series are shown in the following table)
Type No.
SC91312/A
SC91314/A
SC91316
Pulse(pps)
10/20
10/20
10/20
Flash(ms)
600/300
73/100
600
Flash pause(ms)
600/300
140/100
600
Pause(s)
2.0
3.6
3.6
PIN CONFIGURATIONS
C1
C2
C3
C4
B/M
V
SS
XT
XT
T/P MUTE
1
2
3
4
5
6
7
8
9
SC91310
18
R4
17
R3
16
R2
15
R1
14
V
DD
13
MODE
12
DTMF
11
DP
10
HKS
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 2.1
2002.12.03
1
Silan
Semiconductors
BLOCK DIAGRAM
XT
SC91310 Series
XT
7
HKS
B/M
MODE
8
10
5
13
15
16
17
18
1
2
3
4
D/A
CONVERTER
ROW&COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH&
DECODER
KEYBOARD
INTERFACE
READ/WRITE
COUNTER
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
SYSTEM CLOCK
GENERATION
R1
R2
R3
R4
C1
C2
C3
C4
9
11
T/P MUTE
DP
RAM
LOCATION
LATCH
DTMF
12
ABSOLUTE MAXIMUM RATINGS
Characteristic
DC Supply Voltage
Symbol
V
DD
-V
SS
V
IL
Value
-0.3~7.0
V
SS
-0.3
V
DD
+0.3
V
SS
-0.3
V
DD
+0.3
120
-20~+70
-55~+125
Unit
V
V
V
V
V
mW
°C
°C
Input / Output Voltage
V
IH
V
OL
V
OH
Power Dissipation
Operating Temperature
Storage Temperature
P
D
Topr
Tstg
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and
reliability of the device.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 2.1
2002.12.03
2
Silan
Semiconductors
DC ELECTRICAL CHARACTERISTICS
SC91310 Series
Conditions
Min
2.0
Tone
--
--
--
& No key entry
HKS
=1, V
DD
=1.0V
(Tamb=25~70°C, V
DD~
V
SS
=2.5V, fosc=3.58MHz, all outputs unloaded)
Parameter
Operating Voltage
Operating Current
Symbol
V
DD
I
OP
Pulse
Typ
--
0.3
0.15
--
--
150
2
-30
--
--
--
--
300
--
400
--
Max
5.5
0.5
0.3
15
0.2
170
3
-23
3.0
--
--
--
--
--
--
5.0
Unit
V
mA
mA
µA
µA
mVrms
dB
dB
V
mA
mA
mA
kΩ
µA
µA
kΩ
HKS
=0, No load,
Standby Current
Memory Retention Current
DTMF Output Voltage
Pre-emphasis
DTMF Distortion
DTMF OUTPUT DC Level
TMF Output Sink Current
DP
Output Sink Current
I
SB
I
MR
V
TO
--
130
1
--
1.0
0.2
0.5
0.5
--
Row group, R
L
=5kΩ
Col/Row, V
DD
=2.0~5.5V
T
HD
V
TDC
I
TL
I
PL
I
ML
R
KH
I
KD
I
KS
R
L
=5kΩ, V
DD
=2.0~5.5V
R
L
=5kΩ, V
DD
=2.0~5.5V
V
TO
=0.5V
V
PO
=0.5V
V
MO
=0.5V
T/P
MUTE
Output Sink Current
HKS
I/P Pull-high Resistor
Keypad Input Drive Current
Keypad Input Sink Current
Keypad Resistance
V
I
=0V
V
I
=2.5V
30
200
--
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 2.1
2002.12.03
3
Silan
Semiconductors
AC ELECTRICAL CHARACTERISTICS
Parameter
Keypad Active in Debounce
Key Release Debounce
Pre-digit Pause
1
SC91310 Series
Conditions
Min
--
--
B/M=1
B/M=0
B/M=1
B/M=0
10pps
20pps
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Symbol
T
KID
T
KRD
T
PDP1
10pps
2
Typ
20
20
40
33.3
20
16.7
800
500
40:60
33:67
100
100
73
100
300
600
100
140
300
600
2.0
3.6
Max
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Unit
mS
mS
mS
Pre-digit Pause
T
PDP2
20pps
T
IDP
mS
Interdigit Pause (Auto dialing)
mS
Make / Break Ratio
DTMF Output Duration
Intertone Pause
M/B
T
TD
T
ITP
B/M=1
B/M=0
Auto Dialing
Auto Dialing
SC91314
%
mS
mS
Flash Break Time
T
FB
SC91314A
SC91312A
SC91312 / SC91316
SC91314A
mS
Flash Pause Time
T
FP
SC91314
SC91312A
SC91312 / SC91316
mS
Pause Time
T
P
SC91312
SC91314A / SC91316
S
Note: 1. Crystal parameters suggested for proper operation are Rs<100Ω, Lm=96mH, Cm=0.02pF, Cn=5pF,
Ci=18pF, Fosc.=3.579545MHz±0.02%.
2. Crystal oscillator accuracy directly affects these times.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 2.1
2002.12.03
4
Silan
Semiconductors
PIN DESCRIPTION
Pin No.
1~4
&
15~18
SC91310 Series
Description
Pin Name
Column-
Row Inputs
I/O
The keyboard input may be from either the standard 4x4 keyboard or an
I
inexpensive single contact (form A) keyboard. Electronic input from a
µC
can
also be used. A valid key entry is defined as a single row being connected to a
single column.
XT,
XT
I,O
A built-in inverter provides oscillation with an inexpensive 3.579545 MHz crystal
or ceramic resonator.
The T/P
MUTE
is a conventional CMOS N-channel open drain output. The
7,8
9
T/P
MUTE
O
output transistor is switched on during pulse and tone mode dialing sequence
and flash break. Otherwise, it is switched off.
Pulling mode pin to Vss places the dialer in tone mode. Pulling mode pin to V
DD
13
MODE
I
places the dialer in pulse mode (10 pps). Leaving mode pin floating places the
dialer in pulse mode (20 pps).
Hook switch input.
HKS
= 1: On-hook state. Chip in sleeping mode, no
10
HKS
O
operation.
HKS
= 0: Off-hook state. Chip enabled for normal operation. The
HKS
pin is pulled to V
DD
by an internal resistor.
11
DP
O
N-channel drain dialing pulse output (Figure 1). Flash key will cause
DP
to go
active in both pulse mode and tone mode.
In pulse mode, remains in low state at all times. In tone mode, outputs a dual or
single tone. Detailed timing diagram for tone mode is shown in Figure 2(a, b).
Output Frequency(Hz)
Specified
R1
697
770
852
941
1209
1336
1477
Actual
699
766
848
948
1216
1332
1472
Error %
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
12
DTMF
O
R2
R3
R4
C1
C2
C3
14,6
5
V
DD,
Vss
B/M
I
I
Power input pins.
The break make ratio is 60:40 if
/M
= 1 and is 66.6:33.3 if B/M = 0. This pin has
no function in DTMF mode.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 2.1
2002.12.03
5
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