General description

The PCD3316 is a low power mixed signal CMOS integrated circuit for receiving physical layer signals like Bellcore’s ‘CPE1 Alerting Signal (CAS)’ and the signals used in similar services. The device is capable of a very high precision detection of the dual tone (2130 and 2750 Hz) by using a patented digital algorithm. The PCD3316 can be used for on-hook and off-hook Caller-ID (CID), Caller-ID on Call Waiting (CIDCW) and Caller-Name (CNAM) applications.

Features

■ Bellcore’s ‘CPE Alerting Signal (CAS)’ and British Telecom’s (BT) ‘Loop State Tone Alert Signal’ detection

■ BT’s ‘Idle State Tone Alert Signal’ by means of monitoring the input signal level

■ 1200 baud FSK demodulator conform Bell 202 and CCITT V23 standards

■ Ring or polarity change detector

■ Ring period measurement

■ Low battery comparator

■ Signal level detector

■ On-hook and off-hook applications according to Bellcore TR-NWT-000030 and SR-TSV-002476 specifications

■ Receive sensitivity of −37.8 dBm (in 600 Ω) for CAS

■ 2.5 to 3.6 V supply; low power standby mode

■ Selectable 1 second or 1 minute timebase interrupt

■ 3.58 MHz and 32.768 kHz crystal oscillators

■ SO16 package.

Applications

■ Analog Display Services Interface (ADSI) phones

■ Feature phones and adjunct boxes with Bellcore CID, CIDCW and CNAM systems

■ Computer Telephony Integrated (CTI) systems.