SI3225PPT0-EVB
数据手册.pdf音频 IC 开发工具 Si3225 Evaluation Board with Si3200 line interface, parallel port
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 ringingSi3220
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 meteringSi3220
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