Silan Semiconductors SC9200A/B DTMF GENERATORS DESCRIPTION The SC9200A/B 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 provides a serial mode whereas the SC9200B contains a selectable serial/parallel mode interface for various applications such as security systems, home automation, remote control through telephone lines communication system, etc. DIP-8 FEATURES * Operating voltage: 2.0V~5.5V * Serial mode for the SC9200A * Serial/parallel mode for the SC9200B * Low standby current * Low total harmonic distortion * 3.58MHz crystal or ceramic resonator SELECTION TABLE Function Operating Voltage OSC Frequency Interface Package SC9200A 2V-5.5V 3.58MHz Serial 8 DIP/SOP SC9200B 2V-5.5V 3.58MHz Serial/Parallel 14 DIP/SOP Part No. PIN CONFIGURATIONS X2 2 X1 3 VSS 4 5 VDD 6 DTMF 7 DATA 8 CLK 1 14 VDD X2 2 13 DTMF X1 3 12 DATA VSS 4 NC 5 D0 6 9 D3 D1 7 8 D2 SC9200B 1 SC9200A CE CE 11 CLK 10 S/P HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 1 2001.02.02 Silan Semiconductors SC9200A/B BLOCK DIAGRAM X1 X2 DATA CLK 3.58MHz Crystal/Resonator Oscillator Serial Data Input Circuit DTMF Generator Control Circuit Parallel Data Input Circuit CE D3 D2 D1 D0 DTMF ABSOLUTE MAXIMUM RATINGS Symbol Value Unit Supply Voltage Characteristic VSS -0.3~6 V Input Voltage VIN VSS-0.3~VDD+0.3 V Storage Temperature TSTG -50~125 °C Operating Temperature TOPR -20~75 °C HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 2 2001.02.02 Silan Semiconductors SC9200A/B ELECTRICAL CHARACTERISTICS Parameter Test Conditions Symbol VDD Operating Voltage VDD Operating Current IDD Typ Max Unit -- 5.5 V -- 240 2500 -- 950 3000 Serial 1.8 Parallel 2.0 -2.5V Min Conditions S/P =VDD, µA D0~D3=VSS, 5.0V CE =VSS, No load Low Input Voltage VIL -- -- VSS -- 0.2VDD V High Input Voltage VIH -- -- 0.8VDD -- VDD V Standby Current ISTB Pull-high Resistance RP 2.5V S/P , CE =VDD, -- -- 1 5.0V No load -- -- 2 120 180 270 45 68 100 -- tUP+6 tUP+8 ms 2.5V VOL=0V 5.0V DTMF Output Delay Time -- µA kΩ tDE 5V DTMF Output DC Level VTDC 2V~5.5V DTMF Output 0.45VDD -- 0.75VDD V DTMF Sink Current ITOL 2.5V VDTMF=0.5V -0.1 -- -- mA DTMF Output AC Level VTAC 2.5V Row group, RL=5kΩ 0.12 0.15 0.18 Vrms Column Pre-emphasis ACR 2.5V Row group=0dB 1 2 3 dB RL 2.5V tHD≤-23dB 5 -- -- kΩ Tone Signal Distortion tHD 2.5V RL=5kΩ Clock Input Rate (Serial Mode) fCLK -- (Parallel Mode) DTMF Output Load -- -30 -23 dB -- 100 500 kHz -- -- 10 ms 3.5759 3.5759 3.5831 MHz The time from CE Oscillator Starting Time (When CE is low) -- tUP 5.0V fOSC -- falling edge to normal oscillator operation System Frequency Crystal=3.5795MHz HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 3 2001.02.02 Silan Semiconductors SC9200A/B PIN DESCRIPTIONS Pin NO. Pin Name I/O Internal Connection 1 CE I CMOS IN Pull-high 2 X2 O 3 X1 I 4 VSS -- -- 5 NC -- -- Description Chip enable, active low The system oscillator consists of an inverter, a bias resistor, Oscillator 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. 6~9 D0~D 3 I CMOS IN Pull-high or floating 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 10 S/P I CMOS IN S/P =”H”: Parallel mode S/P =”L”: Serial mode Data synchronous clock input for the serial mode. When the IC 11 CLK I CMOS IN Pull-high is operating in the parallel mode, the input terminal (CLK) is or floating 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 CMOS IN Pull-high operating in the parallel mode, the input terminal (DATA) is or floating included with a pull-high resistor. When the IC is operating in 12 DATA I 13 DTMF O CMOS OUT Output terminal of the DTMF signal 14 VDD -- -- Positive power supply, 2.0V~5.5V for normal operation the serial mode, this pin becomes floating. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 4 2001.02.02 Silan Semiconductors SC9200A/B FUNCTIONAL DESCRIPTION The SC9200A/B are DTMF generators for µC interfaces. They are controlled by a µC in the serial mode. 1. Serial mode (SC9200A/B) The SC9200A/B employ a data input, a 5-bit code, and a synchronous clock to transmit a DTMF signal. Every digital of a phone number to be transmitted is selected by a series of inputs that consist of 5-bit data. Of the 5 bits, the D0 (LSB) is the first received bit. The SC9200A/B will latch data on the falling edge of the clock (CLK pin). 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 D4 D3 D2 D1 D0 Tone Output Frequency (Hz) 1 0 0 0 0 1 697+1209 2 0 0 0 1 0 697+1336 3 0 0 0 1 1 697+1477 4 0 0 1 0 0 770+1209 5 0 0 1 0 1 770+1336 6 0 0 1 1 0 770+1477 7 0 0 1 1 1 852+1209 8 0 1 0 0 0 852+1336 9 0 1 0 0 1 852+1477 0 0 1 0 1 0 941+1336 941+1209 * 0 1 0 1 1 # 0 1 1 0 0 941+1477 A 0 1 1 0 1 697+1633 B 0 1 1 1 0 770+1633 C 0 1 1 1 1 852+1633 D 0 0 0 0 0 941+1633 -- 1 0 0 0 0 697 -- 1 0 0 0 1 770 -- 1 0 0 1 0 852 -- 1 0 0 1 1 941 -- 1 0 1 0 0 1209 -- 1 0 1 0 1 1336 -- 1 0 1 1 0 1477 -- 1 0 1 1 1 1633 DTMF OFF 1 1 1 1 1 -- *Notes: The codes not listed in Table 1 are not used D4 is MSB. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 5 2001.02.02 Silan Semiconductors SC9200A/B S/P X2 (Oscillator) tUP CE CLK LSB MSB LSB MSB LSB MSB 1 1 1 1 1 DATA Digit 1 Digit 2 Stop code DTMF Digit 1 DTMF signal Digit2 DTMF signal Figure 1 2. Parallel mode (SC9200B) The SC9200B 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 figure 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. HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 6 2001.02.02 Silan Semiconductors SC9200A/B Table 2: Digits vs. input data vs. tone output frequency (parallel mode) Digit D3 D2 D1 D0 Tone Output Frequency 1 0 0 0 1 697+1209 2 0 0 1 0 697+1336 3 0 0 1 1 697+1477 4 0 1 0 0 770+1209 5 0 1 0 1 770+1336 6 0 1 1 0 770+1477 7 0 1 1 1 852+1209 8 1 0 0 0 852+1336 9 1 0 0 1 852+1477 0 1 0 1 0 941+1336 * 1 0 1 1 941+1209 # 1 1 0 0 941+1477 A 1 1 0 1 697+1633 B 1 1 1 0 770+1633 C 1 1 1 1 852+1633 D 0 0 0 0 941+1633 S/P X2 (Oscillator) CE D0~D3 DTMF tDE tDE *Note: The data (D0~D3) should be ready before the CE becomes low. Figure 2 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 7 2001.02.02 Silan Semiconductors SC9200A/B Tone frequency Output Frequency (Hz) Specified %Error Actual 697 699 +0.29% 770 766 -0.52% 852 847 -0.59% 941 948 +0.74% 1209 1215 +0.50% 1336 1332 -0.30% 1477 1472 -0.34% % Error does not contain the crystal frequency drift APPLICATION CIRCUIT Serial mode VDD VDD VDD CE 1 CE 3.579545MHz CLK VSS DATA 20pF 20pF C 2 VDD 5 X2 DTMF 6 3 X1 DATA 7 Tone output CLK 8 4 VSS SC9200 Serial/parallel mode VDD VDD VDD CE 3.579545MHz D0 D1 D2 20pF 20pF 1 CE VDD 14 2 X2 DTMF 13 3 X1 DATA 12 4 VSS CLK 11 D3 5 NC S/P 10 S/P 6 D0 D3 9 CLK 7 D1 D2 8 VSS DATA Tone output SC9200A/B C HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 8 2001.02.02 Silan Semiconductors SC9200A/B PACKAGE OUTLINE DIP-8-300-2.54 UNIT: mm 7.62 6.40 0.25 2.54 1.25 15 degree 3.30 5.08 3.40 9.20 0.46 DIP-14-300-2.54 UNIT:mm 7.62 6.40 0.25 2.54 1.50 15 degree 3.30 5.08 3.51 19.4 0.46 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.0 9 2001.02.02