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