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 / VDD | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| VDD | Operating Voltage | — | 2.0 | — | 5.5 | V |
| IDD | Operating Current | VDD = 2.5V, No load | — | 240 | 2500 | μA |
| VDD = 5.0V, No load | — | 950 | 3000 | μA | ||
| VIL | “Low” Input Voltage | — | VSS | — | 0.2VDD | V |
| VIH | “High” Input Voltage | — | 0.8VDD | — | VDD | V |
| ISTB | Standby Current | VDD = 2.5V, S/P = VDD, CE = VDD | — | — | 1 | μA |
| VDD = 5.0V, S/P = VDD, CE = VDD | — | — | 2 | μA | ||
| RP | Pull-high Resistance | VDD = 2.5V, VOL = 0V | 120 | 180 | 270 | kΩ |
| VDD = 5.0V, VOL = 0V | 45 | 68 | 100 | kΩ | ||
| VTDC | DTMF Output DC Level | DTMF Output | 0.45VDD | — | 0.75VDD | V |
| ITOL | DTMF Sink Current | VDD = 2.5V, VDTMF = 0.5V | 0.1 | — | — | mA |
| VTAC | DTMF Output AC Level | VDD = 2.5V, Row group, RL = 5kΩ | 0.12 | 0.15 | 0.18 | Vrms |
| ACR | Column Pre-emphasis | VDD = 2.5V, Row group = 0dB | 1 | 2 | 3 | dB |
| RL | DTMF Output Load | VDD = 2.5V, tHD ≤ -23dB | 5 | — | — | kΩ |
| tHD | Tone Signal Distortion | VDD = 2.5V, RL = 5kΩ | — | 30 | 23 | dB |
| fCLK | Clock Input Rate | Serial Mode | 100 | — | 500 | kHz |
| tUP | Oscillator Starting Time | VDD = 5.0V, From CE falling edge | — | — | 10 | ms |
| fOSC | 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