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HT9274 Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
HT9274HOLTEK389Yes

HT9274 is a DTMF (Dual-Tone Multi-Frequency) receiver IC manufactured by HOLTEK.

The HT9274 is a DTMF (Dual-Tone Multi-Frequency) receiver IC manufactured by HOLTEK. Below are its key specifications, descriptions, and features:

Specifications:

  • Operating Voltage: 2.5V to 5.5V
  • Operating Current: 1.5mA (typical at 3V)
  • Standby Current: 0.5µA (typical)
  • Frequency Tolerance: ±1.5%
  • Input Gain Adjustable: Yes
  • Output Format: 4-bit binary (parallel) or serial (via internal shift register)
  • DTMF Decoding: Full 16-key (0-9, *, #, A-D)
  • Operating Temperature: -40°C to +85°C
  • Package Options: 18-pin DIP/SOP

Descriptions:

The HT9274 is a low-power CMOS DTMF receiver designed for telephony and remote control applications. It decodes DTMF signals into corresponding digital outputs and includes an internal band-split filter for accurate tone detection.

Features:

  • Low power consumption
  • Built-in dial tone rejection
  • Adjustable guard time
  • Serial or parallel output mode
  • Power-down mode for reduced standby current
  • Noise immunity with digital counting detection

This IC is commonly used in communication devices, security systems, and remote control applications. For detailed electrical characteristics, refer to HOLTEK's official datasheet.

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