Si32172/3/5 Features
 Complete FXS solution in 5 x 7 mm
 3-wire ISI combines PCM, SPI, and
interrupt data
 Performs all BORSCHT functions
 Ideal for short to medium loops
 Global programmability
 Internal balanced or unbalanced
ringing
 Patented low power ringing
 Simplified configuration and
diagnostics
 Supported by ProSLIC API
 Ultra low power consumption
 Integrated tracking dc-dc controller
with direct connection to MOSFET
 Wideband voice support
(Si32172/3)
 On-hook transmission
 Loop or ground start operation
 Smooth polarity reversal
 A-Law/μ-Law companding,
linear PCM
 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
 DTMF generation
 DTMF detection (Si32175)
 Pulse metering
 3.3 V operation
 Support for 1.8 V I/O
 Maximum battery up to –140 V
 Pb-free/RoHS-compliant
packaging