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SC9200
DTMF GENERATOR WITH MICRO-PROCESSOR INTERFACE
DESCRIPTION
The SC9200 tone generators are designed for C interfaces. They can be instructed by a C 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
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SC9200
ABSOLUTE MAXIMUM RATING
Characteristic Supply Voltage Input Voltage Storage Temperature Operating Temperature Symbol VSS VIN Tstg Topr Ratings -0.3~6 VSS-0.3~VDD+0.3 -50~125 -20~75 Unit V V C C
ELECTRICAL CHARACTERISTICS
Characteristics Operating Voltage Symbol VDD Test Conditions VDD -2.5V Operating Current IDD 5.0V --2.5V 5.0V 2.5V 5.0V 5V Conditions Serial Parallel
S/P =VDD, D0~D3=VSS,
CE
Min. 1.8 2.0 ---
Typ. -240 950 ----180 68 tUP+6 --0.15 2 --30 100
Max. 5.5 2500 3000 0.2VDD VDD 1 2 270 100 tUP+8 0.75VDD -0.18 3 --23 500
Unit V
=VSS, No load --VSS 0.8VDD --120 45 --0.45VDD -0.1 0.12 1 5 ----
A V V A k ms V mA Vrms dB k 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
VIL VIH ISTB RP tDE VTDC ITOL VTAC ACR RL tHD fCLK
S/P , CE =VDD,
No load VOL=0V
2V~5.5V DTMF Output 2.5V 2.5V 2.5V 2.5V 2.5V -VDTMF=0.5V Row group, RL=5k Row group=0dB tHD-23dB RL=5k
The time from CE tUP fOSC 5.0V -falling edge to normal oscillator operation Crystal=3.5795MHz 3.5759 3.5759 3.5831 MHz --10 ms
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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 VSS 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 VDD Output terminal of the DTMF signal. Positive power supply, 2.0V~5.5V for normal operation.
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SC9200
FUNCTIONAL DESCRIPTION
The SC9200 are DTMF generators for C interfaces. They are controlled by a C 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.
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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
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SC9200
Figure 1
APPLICATION CIRCUIT
Serial mode
Serial/parallel mode
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SC9200
PACKAGE OUTLINE
DIP-8-300-2.54 UNIT: mm
2.54 0.250.05 15 degree
6.35 0.25
1.52
+0.4 9.40 -0.3
0.5MIN 3.00MIN
+0.35 0.89 -0.30 0.46
DIP-14-300-2.54
4.36MAX
7.62 0.30
UNIT: mm
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SC9200
PACKAGE OUTLINE (Continued)
SOP-8-225-1.27 UNIT: mm
3.90.3
SOP-14-225-1.27
1.550.20
0.3
1.27
5.720.3
6.00.4
UNIT: mm
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
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2004.08.03 Page 8 of 10
SC9200
HANDLING MOS DEVICES:
Electrostatic charges can exist in many things. All of our MOS devices are internally protected against electrostatic discharge but they can be damaged if the following precautions are not taken: * Persons at a work bench should be earthed via a wrist strap. * Equipment cases should be earthed. * All tools used during assembly, including soldering tools and solder baths, must be earthed. * MOS devices should be packed for dispatch in antistatic/conductive containers.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
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2004.08.03 Page 9 of 10

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