Cmos Calling Number Identification Circuit 2 Preliminary Information

The MT8843 Calling Number Identification Circuit 2 (CNIC2) is a low power CMOS integrated circuit intended for receiving physical layer signals transmitted according to BT (British Telecom) SIN227 & SIN242, CTA (Cable TV Association) TW/ P&E/312 and Bellcore TR-NWT-000030 & SR-TSV- 002476 specifications. The CNIC2 provides all the features and functions offered by Mitels MT8841 (CNIC), including 1200 baud BELL 202 and CCITT V.23 FSK demodulation. The 3-wire serial FSK Interface provided by CNIC has been enhanced to operate in two modes. The first mode is the CNIC compatible mode whereby data transfer is initiated by the device. The new, second mode allows a Microcontroller to extract 8-bit data words from the device. Furthermore, CNIC2 offers Idle State Tone Alert Signal and line reversal detection capability for BTs CLIP, ring burst detection for CTAs CLIP, and ring detection for Bellcores CID. By Mitel
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MT8843 Application circuits
MT8843 circuits
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