SC9200
DTMF GENERATOR WITH MICRO-PROCESSOR INTERFACE
DESCRIPTION
The SC9200 tone generators are designed for
µC
interfaces. They can
be instructed by a
µC
to generate 16 dual tones and 8 single tones from
the DTMF pin. The SC9200A/AS provides a serial mode whereas the
SC9200B/BS contains a selectable serial/parallel mode interface for
various applications
DIP-8
SOP-8
FEATURES
* Operating voltage: 2.0V~5.5V
* Serial mode for the SC9200A/AS
* Serial/parallel mode for the SC9200B/BS
* Low standby current
* Low total harmonic distortion
* 3.58MHz crystal or ceramic resonator
DIP-14
SOP-14
ORDERING INFORMATION
Part No.
SC9200A
SC9200B
SC9200AS
SC9200BS
Package
DIP-8-300-2.54
DIP-14-300-2.54
SOP-8-225-1.27
SOP-14-225-1.27
APPLICATIONS
* Security systems
* Home automation
* Remote control through telephone lines
* Communication system, etc.
BLOCK DIAGRAM
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:2.0
2004.08.03
Page 1 of 10
SC9200
ABSOLUTE MAXIMUM RATING
Characteristic
Supply Voltage
Input Voltage
Storage Temperature
Operating Temperature
Symbol
V
SS
V
IN
T
stg
T
opr
Ratings
-0.3~6
V
SS
-0.3~V
DD
+0.3
-50~125
-20~75
Unit
V
V
°C
°C
ELECTRICAL CHARACTERISTICS
Characteristics
Operating Voltage
Symbol
V
DD
Test Conditions
V
DD
--
2.5V
Operating Current
I
DD
5.0V
--
--
2.5V
5.0V
2.5V
5.0V
5V
Conditions
Serial
Parallel
S/P
=V
DD
, D0~D3=V
SS
,
CE
Min.
1.8
2.0
--
--
Typ.
--
240
950
--
--
--
--
180
68
t
UP
+6
--
--
0.15
2
--
-30
100
Max.
5.5
2500
3000
0.2V
DD
V
DD
1
2
270
100
t
UP
+8
0.75V
DD
--
0.18
3
--
-23
500
Unit
V
=V
SS
, No load
--
--
V
SS
0.8V
DD
--
--
120
45
--
--
0.45V
DD
-0.1
0.12
1
5
--
--
--
µA
V
V
µA
kΩ
ms
V
mA
V
rms
dB
kΩ
dB
kHz
Low Input Voltage
High Input Voltage
Standby Current
Pull-high Resistance
DTMF Output Delay Time
(Parallel Mode)
DTMF Output DC Level
DTMF Sink Current
DTMF Output AC Level
Column Pre-emphasis
DTMF Output Load
Tone Signal Distortion
Clock Input Rate (Serial
Mode)
Oscillator Starting Time
(When
CE
is low)
System Frequency
V
IL
V
IH
I
STB
R
P
t
DE
V
TDC
I
TOL
V
TAC
ACR
R
L
tHD
f
CLK
S/P
,
CE
=V
DD
,
No load
V
OL
=0V
2V~5.5V DTMF Output
2.5V
2.5V
2.5V
2.5V
2.5V
--
V
DTMF
=0.5V
Row group, R
L
=5kΩ
Row group=0dB
t
HD
≤-23dB
R
L
=5kΩ
The time from
CE
t
UP
f
OSC
5.0V
--
falling edge to normal
oscillator operation
Crystal=3.5795MHz
3.5759
3.5759
3.5831
MHz
--
--
10
ms
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:2.0
2004.08.03
Page 2 of 10
SC9200
PIN CONFIGURATION
PIN DESCRIPTION
Pin NO.
DIP-8
SOP-8
1
2
3
4
DIP-14
SOP-14
1
2
3
4
5
CE
Pin Name
Description
Chip enable, active low.
The system oscillator consists of an inverter, a bias resistor, and the
required load capacitor on chip. The oscillator function can be
implemented by Connect a standard 3.579545MHz crystal to the X1 and
X2 terminals.
Negative power supply.
No connection.
Data inputs for the parallel mode.
When the IC is operating in the serial mode, the data input terminals
(D0~D3) are included with a pull-high resistor. When the IC is operating
in the parallel mode, these pins become floating.
Operation mode selection input
=” : Parallel mode
H”
=” : Serial mode
L”
X2
X1
V
SS
NC
6~9
D0~D3
10
S/P
S/P
S/P
Data synchronous clock input for the serial mode. When the IC is
5
11
CLK
operating in the parallel mode, the input terminal (CLK) is included with
a pull-high resistor. When the IC is operating in the serial mode, this pin
becomes floating.
Data input terminal for the serial mode. When the IC is operating in the
6
12
DATA
parallel mode, the input terminal (DATA) is included with a pull-high
resistor. When the IC is operating in the serial mode, this pin becomes
floating.
7
8
13
14
DTMF
V
DD
Output terminal of the DTMF signal.
Positive power supply, 2.0V~5.5V for normal operation.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:2.0
2004.08.03
Page 3 of 10
SC9200
FUNCTIONAL DESCRIPTION
The SC9200 are DTMF generators for
µC
interfaces. They are controlled by a
µC
in the serial mode.
1. Serial mode (SC9200)
The SC9200 employ a data input, a 5-bit code, and a synchronous clock to transmit a DTMF signal. The
relationship between the digital codes and the tone output frequency is shown in Table 1 as for the control timing
diagram, refer to
Figure 1.
Table 1: Digits vs. input data vs. tone output frequency (serial mode)
Digit
1
2
3
4
5
6
7
8
9
0
*
#
A
B
C
D
--
--
--
--
--
--
--
--
DTMF OFF
D4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
D3
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
1
D2
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
0
1
1
1
1
1
D1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
1
0
0
1
1
1
D0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
1
Tone Output Frequency (Hz)
697+1209
697+1336
697+1477
770+1209
770+1336
770+1477
852+1209
852+1336
852+1477
941+1336
941+1209
941+1477
697+1633
770+1633
852+1633
941+1633
697
770
852
941
1209
1336
1477
1633
--
*Notes: The codes not listed in Table 1 are not used D4 is MSB.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:2.0
2004.08.03
Page 4 of 10
SC9200
Figure 1
2. Parallel mode (SC9200B/BS)
The SC9200B/BS provides four data inputs D0~D3 to generate their corresponding DTMF signals. The
S/P
has to be connected high to select the parallel operation mode. Then the input data codes should be
determined. Finally, the
CE
is connected low to transmit the DTMF signal from the DTMF pin.
The TDE time (about 6ms) will be delayed from the
CE
falling edge to the DTMF signal output.
The relationship between the digital codes and the tone output frequency is illustrated in Table 2. As for the
control timing diagram, see
Fiigure 2.
When the system is operating in the parallel mode, D0~D3 are all in the floating state. Thus, these data
input pins should not float.
Table 2: Digits vs. input data vs. tone output frequency (parallel mode)
Digit
1
2
3
4
5
6
7
8
9
0
*
#
A
B
C
D
D3
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
D2
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
D1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
D0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Tone Output Frequency
697+1209
697+1336
697+1477
770+1209
770+1336
770+1477
852+1209
852+1336
852+1477
941+1336
941+1209
941+1477
697+1633
770+1633
852+1633
941+1633
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:2.0
2004.08.03
Page 5 of 10
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