Description
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.

Features
• Compatible with British Telecom (BT) SIN227 & SIN242, Cable Television Association (CTA) TW/P&E/312, and Bellcore TR-NWT-000030 & SR-TSV-002476
• Ring and line reversal detection
• Bellcore "CPE Alerting Signal (CAS)" and BT "Idle State Tone Alert Signal" detection
• 1200 baud BELL 202 and CCITT V.23 Frequency Shift Keying (FSK) demodulation
• High input sensitivity
• Dual mode 3-wire data interface
• Low power CMOS with powerdown mode
• Input gain adjustable amplifier
• Carrier detect status output
• Uses 3.58 MHz crystal or ceramic resonator

Applications
• BT Calling Line Identity Presentation (CLIP), CTA CLIP, and Bellcore Calling Identity Delivery (CID) systems
• Feature phones, including Analog Display Services Interface (ADSI) phones
• Phone set adjunct boxes
• FAX and answering machines
• Database query and Computer Telephony Integration (CTI) systems