MT8870DE Integrated DTMF Receiver IC

The MT8870DE is a complete DTMF receiver IC that integrates band-split filters and digital decoding. Using switched capacitor filters and digital counting techniques, it detects and decodes all 16 DTMF tone pairs into a 4-bit code. With on-chip differential input amplifier, clock oscillator, and latched three-state bus interface, it reduces the need for external components, simplifying circuit design.

Features:

• Complete DTMF receiver functionality
• Low power consumption
• Internal gain-setting amplifier
• Adjustable guard time
• Power-down and inhibit modes
• Backward compatible with earlier MT8870C versions

Applications:

• Paging and repeater systems
• Remote control devices
• Credit card systems
• Telephone answering machines
• Personal computers
• Receiver systems compliant with BT or CEPT specs

Package Includes:

• 1 x MT8870DE Integrated DTMF Receiver IC