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Integrated Circuit Systems, Inc.
ICS1660
Incoming Call Line Identification (ICLID) Receiver with Ring Detection
Description
The ICS1660 “ICLID” circuit is a monolithic CMOS VLSI device that decodes and detects the Frequency Shift Keying (FSK) signals used in caller identification telephone service. The ICS1660, when used in conjunction with some external components, amplifies, filters and demodulates the FSK data transmitted from the central office to the telephone subscriber. The ICS1660 detects the first power ring signal and demodulates the 1200 baud FSK data transmitted during the silent interval between the first and second power ring. The FSK data is transmitted from the central office switch to the subscriber line as part of the CLASS service of Calling Number Delivery (CND).
ICS1660 Datasheet
