KS58015 DTMF DIALER FOR BINARY DATA-IN INTRODUCTION 14-DIP-300 The KS58015 is a DTMF dialer for 4 bit binary data input from microprocessor. When the tone enable input low, the oscillator is inhibited and the device is in a low power consumption at standby mode. On the low to high transition of tone enable, data is latched into the device and selected the standard DTMF signals. The N-channel open drain output provides a MUTE output during tone generation. 14-SOP-225B FEATURES • Direct interface with microprocessor • Generates 16 standard tones • Uses inexpensive TV crystal or ceramic resonator (3.579545MHz) • Very low total harmonic distortion • Low power standby mode • Binary data inputs with latches • Wide Operating Voltage : 2.5 ~ 8.0V ORDERING INFORMATION Device Package KS58015N 14-DIP-300 KS58015D 14-SOP-225B Operating Temperature - 30°C ~ + 70°C BLOCK DIAGRAM VDD MUTE OSC IN OSC MUTE LOGIC CONTROL CIRCUIT ROW & COLUMN TONE COUNTER OSC OUT TEN ST GS 4 D0 D1 D2 DATA LATCH & DECODER D/A CONVER TER & MIXING D3 VS S Fig.1 TONE OUT KS58015 DTMF DIALER FOR BINARY DATA-IN PIN CONFIGURATION VDD 1 14 TONE OUT TEN 2 13 NC ST 3 12 D3 GS 4 11 D2 VSS 5 10 D1 OSC IN 6 9 D0 OSC OUT 7 8 MUTE KS58015 Fig. 2 PIN DESCRIPTION Pin No Symbol 1 VDD 2 TEN Descriptions Positive supply input Tone enable input. An internal pull-up resistor is in a chip. When this pin connects to logic ‘low’, the oscillator is inhibited and the tone generators and output transistor are turned off. A low to high transition on this pin latches in data from D0 ~ D3, and tone generation continues until this pin is connected ‘low’again. Single tone enable. An internal pull-up resistor is in a chip. When this pin connects 3 ST to logic ‘low’, the device is in a single tone mode. For normal operation, connects this pin to VDD or open-circuit. Group selection input. This pin is used to select the high group or low group fre- 4 GS quency, when the device is in single tone mode. An internal pull-up resistor is in a chip. When this pin connects to VDD or open, the high group will be generated, and when connects to VSS, the low group will be generated. 5 VSS 6 OSC IN Oscillator input Negative supply input 7 OSC OUT Oscillator output 8 MUTE 9, 10, D0, D1, DATA-INPUTS. These are the inputs for binary-coded data, which is latched in on 11, 12 D2, D3 the rising edge of the tone enable signal. 13 N.C 14 Tone out N-channel open drain output. This pin is a logic high state, when the tone enable pin is a high state. This pin goes a logic low state, when the tone enable pin is a low state. No connection. This output is the open emitter of a NPN transistor. When an external load resistor is connected from this pin to VSS, the tone generates on the tone enable pin = ‘High’. KS58015 DTMF DIALER FOR BINARY DATA-IN ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Value Unit Supply Voltage MUTE Voltage Input Voltage Power Dissipation Operating Temperature Storage Temperature VDD VI (MUTE) VI PD T OPR T STG 9 9 VDD + 0.3 ~ VSS - 0.3 500 - 30 ~ + 70 - 55 ~ + 125 V V V mW °C °C ELECTRICAL CHARACTERISTICS (VSS = 0V, 2V<VDD<8V, fOSC = 3.579545MHz, Ta = 25°C, unless otherwise noted) Characteristic Symbol Test Conditions Min Typ Operating Voltage Range VDD Operating Current IDD VDD = 3.0V, MUTE Open ISB RL = 10K, D0~D3 open, VDD = 3.0V 50 DI0 ~ DI3, TEN 100 Standby Current Input Pull-up Resistance RI (PULL) VIL Input Voltage Output Current (MUTE) Tone Output Level VIH 2.0 DI0 ~ DI3, TEN IOL (MUTE) VDD = 3V, VO = 0.5, TEN = LOW IOH (MUTE) VDD = 3V, VO = VDD, TEN = HIGH VO (TONE) VDD = 3V, RL = 5KΩ, Row Tone dBCR VDD = 3V, RL = 5 KΩ THD (Dual Tone) THD 1MHz Bandwidth, VDD = 5V, RL =5KΩ V 1.5 mA µA 100 KΩ VSS 0.2VDD VDD 0.5 Unit 8.0 0.8VDD V V 1.5 1 -14 1 Ratio of Column to Row Max 2 mA 2 µA -11 dBV 3 dB -20 90% Amplitudes, VDD = 3.0V dB Oscillator Start-up Time tST (OSC) 4 mS Data Set-up Time tSU (DATA) VDD = 3.0V 200 nS Data Hold Time tH (DATA) VDD = 3.0V 200 nS Data Duration tW (DATA) VDD = 3.0V 600 nS APPLICATION INFORMATION FUNCTION DESCRIPTION When tone enable input is low, oscillator is inhibited, being allowed to low power standby mode since transistor goes to turn off state, so D0 ~ D3 input data is ignored. However if tone enable input goes from low to high, input data is latched and tone output is enabled, and it is correspond to data input. This device is designed with 14 levels, 28 segments in each single-tone. The column tone is pre-emphasized 2dB than the row tone. TABLE1. SINGLE TONE FREQUENCY Tone Group Standard DTMF (Hz) ROW 1 ROW 2 ROW 3 ROW 4 COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 697 770 852 941 1209 1336 1477 1633 Tone Output Actual Frequency 699.13 766.17 845.43 947.97 1215.89 1331.67 1471.85 1645.01 % Deviation from Standard + 0.31 - 0.50 - 0.54 + 0.74 + 0.57 - 0.33 - 0.35 + 0.75 KS58015 DTMF DIALER FOR BINARY DATA-IN TABLE 2. FUNCTION TABLE Key Board Data Input Tone Output Equivalent D3 D2 D1 D0 fL (Hz) fH (Hz) 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