GENERAL DESCRIPTION
The Winbond Caller Identification device W91030, is a low power CMOS integrated circuit used to receive physical layer signals transmitted according to Bellcore and British Telecom (BT) specifications. There are two types of Caller Identifications, the first type is on-hook calling with caller ID message and the second type is call on waiting. The W91030 device provides all the features and functions of the Caller Identification specification for both these types, including FSK demodulation, Tone Alert Signal detection and ring detection. The FSK demodulation function can demodulate Bell 202 and CCITT V.23 Frequency Shift Keying (FSK) with 1200 baud rate. The Tone Alert Signal detect function can detect the dual tones of the Bellcore CPE* Tone Alerting Signal (CAS) and the BT Iidle State and Loop State Tone Alert Signal. The line reversal for BT, ring burst for CCA or ring signal for Bellcore can be detected by the ring detector.

The operation mode of the W91030 is M-mode and C-Mode. In M-mode, the ring detect output, alert guard time output and the FSK carrier detect output are activated on its output pin. In C-mode, the ring detect output, alert guard time output and the FSK carrier detect output also will be reflected on the detected output pin. The interrupt outputs only after the end of the alert guard time when the dual tone alert signal has been detected.

There are two modes of FSK data output interface. The first mode is a data transfer activated by the device, whose clock and data change depending upon the changing frequency of the FSK analog signal input. The second mode allows a microcontroller to extract 8-bit data from the device serially; the device notifies the micro-controller when 8-bit data has been received.

FEATURES AND APPLICATIONS

Features
- Compatible with Bellcore TR-NWT-000030 & SR-TSV-002476, British Telecom (BT) SIN227, U.K. Cable Communications Association (CCA) specification
- Ring and line reversal detection
- Bellcore CPE Alerting Signal (CAS) and BT idle State and Loop State Tone Alerting Signal detection use dual tone alerting signal detector
- BELL 202 and CCITT V.23 FSK demodulation with 1200 baud rate
- Use 3.579545 MHz crystal or ceramic resonator
- Low power CMOS technology with sleep mode
- High input sensitivity
- Variable gain input amplifier
- FSK carry detect output
- M-mode and C-mode operation modes
- Two modes for 3-wire FSK data interface
- Packaged in 24-pin 0.6 inch (600 mil) plastic DIP

Applications
- Bellcore Calling Identity Delivery (CID), and BT Calling Line Identity Presentation (CLIP), CCA CLIP systems
- Feature phones
- Phone set adjunct boxes
- FAX and answering machines
- Data base telephone system and Computer Telephony Integration (CTI) systems