Caller ID Receiver Chip

Mitel Semiconductor8E46A is a Caller ID (CID) and Caller ID on Call Waiting (CIDCW) receiver chip that is used in corded and cordless telephones, Internet phones, answering machines, caller ID adjuncts and computer telephony integration (CTI) systems.

The MT88E46A contains all of the circuitry required for a complete physical layer solution, including a Bellcore-compliant CAS detector,1200 baud Bell 202/CCITT V.23 FSK demodulator, and simple microcontroller interface. With two input op-amps, the MT88E46A allows connections to both Tip/Ring, and the telephone hybrid or speech IC receive pair, for optimal CIDCW implementation. The CAS detector reduces false signal detection (a condition known as "talkoff") and signal non-detection ("talkdown") problems.

The device also incorporates power-management functions, including power-down for the FSK, CAS, or full-chip when required. The MT88E46A is suitable for applications using a fixed power source (with a +/-10% variation) between 3 and 5V. Mitel provides an evaluation kit and application note to ease system development.

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