Description

The Dual ProSLIC? is a family of low-voltage CMOS devices that integrate both SLIC and CODEC functionality into a single IC. In combination with a linefeed IC (LFIC), they provide a complete two-channel analog telephone interface in accordance with all relevant LSSGR, ITU, and ETSI specifications.

Features

■ Performs all BORSCHT functions

■ Ideal for short- or long-loop applications

■ Internal balanced or unbalanced ringing

■ Low power consumption

■ Software-programmable parameters:

● Ringing frequency, amplitude, cadence, and waveshape

● Two-wire ac impedance

● Transhybrid balance

● DC current loop feed (10–45 mA)

● Loop closure and ring trip thresholds

● Ground key detect threshold

■ Integrated dc-dc controller

■ Wideband CODEC (Si3227)

■ Low-power sleep mode

■ On-hook transmission

■ Loop or ground start operation

■ Smooth polarity reversal

■ DTMF generator/decoder

■ A-Law/μ-Law companding, linear PCM

■ PCM and SPI bus digital interfaces with programmable interrupts

■ GCI/IOM-2 mode support

■ 3.3 V operation

■ GR-909 loop diagnostics

■ Audio diagnostics with loopback

■ Pb-free/RoHS-compliant packaging

Applications

■ Customer Premises Equipment (CPE)

■ Optical Network Terminals (ONT)

■ Private Branch Exchange (PBX)

■ Cable EMTAs, ATAs, VoIP Gateways