HT9200A DTMF Tone Generator IC 5V 950μA DIP-8

Description

HT9200A DTMF Tone Generator IC 5V 950μA DIP-8 The HT9200A is a high-performance Dual-Tone Multi-Frequency (DTMF) tone generator designed for microelectronic MCU interfaces . It can be instructed directly by a microcontroller to generate 16 dual tones and 8 single tones routed directly through its designated DTMF output pin . Operating over a serial data protocol, the HT9200A transmits phone digit codes efficiently with a low operating current footprint and high precision, making it a reliable choice for telephony, remote control, and automated communication setups . Features Wide Operating Voltage Dedicated Serial Interface Low Standby Power High Audio Quality Standard Clocking Setup Compact Package Footprint Pin Configuration Pin No. Pin Name I/O Internal Connection Description 1 CE I CMOS IN Pull-high Chip enable, active low 2 X2 O Oscillator The system oscillator consists of an inverter, a bias resistor, and the required load capacitor on chip. The oscillator function can be implemented by connecting a standard 3.579545MHz crystal to the X1 and X2 terminals. 3 X1 I Oscillator 4 VSS — — Negative power supply, ground 5 CLK I CMOS IN Pull-high or Floating Data synchronous clock input for the serial mode. When the IC is 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. 6 DATA I CMOS IN Pull-high or Floating Data input terminal for the serial mode. When the IC is operating in the 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 DTMF O CMOS OUT Output terminal of the DTMF signal 8 VDD — — Positive power supply, 2.0V~5.5V for normal operation Specifications Symbol Parameter Test Conditions / V DD Min. Typ. Max. Unit V DD Operating Voltage — 2.0 — 5.5 V I DD Operating Current V DD = 2.5V, No load — 240 2500 μA V DD = 5.0V, No load — 950 3000 μA V IL “Low” Input Voltage — V SS — 0.2V DD V V IH “High” Input Voltage — 0.8V DD — V DD V I STB Standby Current V DD = 2.5V, S/P = V DD , CE = V DD — — 1 μA V DD = 5.0V, S/P = V DD , CE = V DD — — 2 μA R P Pull-high Resistance V DD = 2.5V, V OL = 0V 120 180 270 kΩ V DD = 5.0V, V OL = 0V 45 68 100 kΩ V TDC DTMF Output DC Level DTMF Output 0.45V DD — 0.75V DD V I TOL DTMF Sink Current V DD = 2.5V, V DTMF = 0.5V 0.1 — — mA V TAC DTMF Output AC Level V DD = 2.5V, Row group, R L = 5kΩ 0.12 0.15 0.18 Vrms A CR Column Pre-emphasis V DD = 2.5V, Row group = 0dB 1 2 3 dB R L DTMF Output Load V DD = 2.5V, t HD ≤ -23dB 5 — — kΩ t HD Tone Signal Distortion V DD = 2.5V, R L = 5kΩ — 30 23 dB f CLK Clock Input Rate Serial Mode 100 — 500 kHz t UP Oscillator Starting Time V DD = 5.0V, From CE falling edge — — 10 ms f OSC System Frequency Crystal 3.5795MHz 3.5759 3.5795 3.5831 MHz Applications Home automation systems Integrated security systems Remote control systems operating through telephone lines Telecommunication equipment and MCU-to-telephone line communication lines Package Content 1 x HT9200A DTMF Tone Generator IC 5V 950μA DIP-8 DataSheet HT9200A

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