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HT9212B Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
HT9212BHT143Yes

HT9212B is a DTMF (Dual-Tone Multi-Frequency) generator IC manufactured by Holtek Semiconductor.

The HT9212B is a DTMF (Dual-Tone Multi-Frequency) generator IC manufactured by Holtek Semiconductor.

Key Specifications:

  • Supply Voltage: 2.0V to 5.5V
  • Low Power Consumption:
  • Standby current: < 1µA
  • Operating current: < 1mA
  • DTMF Output:
  • Compliant with ITU-T Q.23 and Bellcore standards
  • Adjustable output amplitude via external resistor
  • Frequency Tolerance: ±0.5%
  • Operating Temperature Range: -20°C to +70°C
  • Package Options: 8-pin DIP/SOP

Features:

  • Built-in oscillator (requires only an external 3.579545MHz crystal)
  • Single-tone and DTMF mode selection
  • Power-down mode for reduced standby current
  • Simple serial interface for control
  • High noise immunity

Applications:

  • Telephone systems
  • Remote control devices
  • Security systems
  • Industrial automation

For detailed electrical characteristics and timing diagrams, refer to the official HT9212B datasheet from Holtek Semiconductor.

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