The HT9170C is a DTMF (Dual-Tone Multi-Frequency) receiver integrated circuit manufactured by Holtek. It is designed to decode DTMF signals commonly used in telephone systems and other communication devices. This IC converts the analog DTMF tones into a digital code, allowing microcontrollers or other digital systems to identify the dialed digits or commands. The HT9170C is known for its low power consumption, high accuracy, and robust performance, making it a popular choice for a wide range of DTMF decoding applications.

Applications

• Telephone Systems
• Remote Control Systems
• Security Systems
• Answering Machines
• Call Progress Monitoring

Features

• Low Power Consumption
• High Accuracy DTMF Decoding
• Microprocessor Interface
• Power-Down Mode
• Adjustable Guard Time
• Single 5V Power Supply

Benefits

• Accurate DTMF Decoding: Provides reliable and accurate decoding of DTMF signals, ensuring correct digit or command recognition.
• Low Power Operation: Minimizes power consumption, making it suitable for battery-powered devices and energy-efficient applications.
• Easy Microprocessor Interface: Simplifies integration with microcontrollers and other digital systems, reducing design complexity.
• Power-Down Mode: Reduces power consumption further when not actively decoding DTMF signals.
• Adjustable Guard Time: Allows optimization of decoding performance for different DTMF signal characteristics.

Technical Specifications

The HT9170C operates from a single 5V power supply. It features a microprocessor interface that allows easy connection to a microcontroller for data retrieval and control. The device includes an adjustable guard time to optimize decoding accuracy. It also has a power-down mode to minimize power consumption when not in use. The IC is available in DIP (Dual In-line Package) and SOP (Small Outline Package) to suit different PCB layout needs.

This DTMF receiver is commonly used in applications such as telephone systems, remote control devices, and security systems. Its combination of accuracy, low power consumption, and ease of use makes it a valuable component in communication and control systems.