●Description
●The Dual ProSLIC® is a series of low-voltage CMOS devices thatintegrate both SLIC and codec functionality into a single IC to provide a complete dual-channel analog telephone interface in accordance withall relevant LSSGR, ITU, and ETSI specifications. The Si3220 includes internal ringing generation to eliminate centralized ringers and ringing relays, and the Si3225 supports centralized ringing for long loop and legacy applications.
●Features
●Performs all BORSCHT functions
●Ideal for applications up to 18 kft
●Internal balanced and unbalanced ringing(Si3220)
●External bulk ringer support (Si3225)
●Software-programmable parameters:
● Ringing frequency, amplitude, cadence, and waveshape (Si3220)
● Two-wire ac impedance
● Transhybrid balance
● DC current loop feed
● Loop closure and ring trip thresholds
● Ground key detect threshold
●Automatic switching of up to three battery supplies
●On-hook transmission
●Loop or ground start operation with smooth/abrupt polarity reversal
●Modem/fax tone detection
●DTMF generation/decoding
●Dual tone generators
●A-Law/µ-Law, linear PCM companding
●PCM and SPI bus digital interfaces with programmable interrupts
●GCI mode support
●3.3 or 5 V operation
●GR-909 loop diagnostics
●Audio diagnostics with loopback
●12 kHz/16 kHz pulse metering(Si3220)
●FSK caller ID generation
●Lead-free/RoHS-compliant
●Applications
●Digital loop carriers
●Central Office telephony
●Pair gain remote terminals
●Wireless local loop
●Private Branch Exchange (PBX) systems
●Cable telephony
●Voice over IP/voice over DSL
●ISDN terminal adapters
