SI32281-A-ZM1中文资料思佳讯数据手册PDF规格书

KEY FEATURES

• Two complete FXS channels in a single

7x7 or 8x8 mm package

• Performs all BORSCHT functions

• Ideal for short- or medium-loop

applications

• Ultra-low power consumption

• Patented low-power ringing

• Patent-pending Smart Ringing

• Reduces peak current with 2-channel

ringing

• Adaptive ringing

• Simplified configuration and diagnostics

• Supported by ProSLIC API

• Audio diagnostics with loopback

• Integrated test load

• Wideband voice support

• On-hook transmission

• Loop or ground start operation

• Smooth polarity reversal

• Programmable interrupts

• 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

• Flexible integrated tracking DC-DC

controller supporting patent-pending lowcost

capacitive boost configuration

• DTMF Generation

• DTMF Detection (Si32281/3/5/7)

• 3-wire Integrated Serial Interface (ISI) or

PCM interface

• A-Law/μ-Law companding, linear PCM

• Pulse metering

• 3.3 V operation

• Pb-free/RoHS-compliant packaging