IDT82V1671

CHIPSET OF RINGING SUBSCRIBER LINE INTERFACE CIRCUIT (RSLIC) & QUAD PROGRAMMABLE PCM CODEC PRELIMINARY IDT82V1671 (RSLIC) IDT82V1074 (CODEC) FEATURES Programmable DC feeding characteristics Programmable digital filters adapting to different requirements: − Impedance matching − Transhybrid balance − Transmit and receive gain adjustment − Frequency response correction Off-hook and ground-key detection AC/DC ring trip detection Programmable internal balanced ringing without external components Supports external ringing Selectable MPI and GCI interfaces Supports A/µ-law compressed and linear data formats Programmable IO pins with relay-driving or analog input capability Line polarity reversal Integrated FSK generator for sending Caller ID information On-hook transmission 2 programmable tone generators per channel Integrated Universal Tone Detection (UTD) unit for fax/modem tone detection Integrated Test and Diagnosis Functions (ITDF) Three-party conference Only battery and 3.3 V power supply needed Package available: IDT82V1671: 28 pin PLCC IDT82V1074: 100 pin TQFP DESCRIPTION The RSLIC-CODEC chipset is comprised of one four-channel programmable PCM CODEC (IDT82V1074) and four single-channel ringing SLICs (IDT82V1671). The chipset provides a total solution for line card designs. In addition to providing a complete software programmable solution for BORSCHT, additional functions such as FSK generator, Universal Tone Detection (UTD) unit, tone...