MT8870DE IC DTMF Receiver decoder DIP-18 MT8870DE

Product Overview: The MT8870D is a complete dual-tone multi-frequency (DTMF) receiver integrating both bandsplit filter and digital decoder functions. The filter section utilizes switched capacitor techniques for high and low group filters, while the decoder uses digital counting techniques to detect and decode all 16 DTMF tone-pairs into a 4-bit code. External component count is minimized by the on-chip provision of a differential input amplifier, a clock oscillator, and a latched three-state bus interface. Typical applications cover receiver systems for British Telecom (BT) or CEPT specifications, paging systems, repeater systems/mobile radio, credit card systems, remote control, personal computers, and telephone answering machines.

Core Specifications:

• Manufacturer: Mitel Semiconductor

• Package Type: 18-pin Plastic DIP, 18-pin Ceramic DIP, 18-pin SOIC, 20-pin SSOP, and 20-pin TSSOP packages

• Function: Monolithic DTMF receiver offering low power consumption, an adjustable guard time, an inhibit mode, and a power-down mode