HT9170 Holtek DTMF Receiver [Original]

Holtek HT9170 DTMF Receiver IC - Dual Tone Multi-Frequency Decoder

The Holtek HT9170 is a highly integrated Dual Tone Multi-Frequency (DTMF) receiver, designed for robust and efficient signal decoding. It precisely decodes all 16 standard DTMF tone pairs into a clear 4-bit digital output. This series incorporates both a digital decoder and advanced bandsplit filter functions, significantly reducing the need for external components. Highly accurate switched capacitor filters are employed to divide incoming DTMF signals into low and high group frequencies. A built-in dial tone rejection circuit further enhances performance by eliminating unwanted pre-filtering requirements. Specific types like the HT9170B and HT9170D also offer power-down and inhibit modes for energy-saving operation. Utilizing digital counting techniques, the HT9170 ensures reliable and accurate tone detection, making it an excellent choice for various communication and control applications.

Specifications:

• Operating Voltage: 2.5V ~ 5.5V
• Package Type: 18-pin DIP IC
• Output Type: 4-bit Digital Code
• Decoding Method: Digital Counting Techniques
• Integrated Filters: Switched Capacitor Bandsplit Filters
• Special Features: Dial Tone Rejection, Power-down Mode (HT9170B/D), Inhibit Mode (HT9170B/D)
• Tone Pairs Decoded: All 16 DTMF Tone Pairs

Key features and benefits:

• Wide Operating Voltage Range (2.5V to 5.5V)
• Minimal External Components Required
• Integrated Bandsplit Filter & Digital Decoder
• Built-in Dial Tone Rejection Circuit
• Low Standby Current Consumption
• Decodes all 16 DTMF Tone Pairs
• Available in 18-pin DIP Package
• Power-down and Inhibit Modes (for HT9170B/D types)

Applications:

• Telecommunication Systems
• Remote Control Systems
• Interactive Voice Response (IVR) Systems
• Security and Access Control
• Home Automation
• Data Entry Terminals

Package Includes:

*Image shown is a representation only.

Note: Contact sales(at)electroncomponents.com for bulk enquiry & get best price!