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The Si3056 is an integrated silicon Direct Access Arrangement (DAA) with a
DSP-compatible Standard Serial Interface (SSI) offering global compliance
through a programmable telephone line interface.
Offered as a chipset with either the Si3018 global line-side device or the
Si3019 enhanced global line-side device, the Si3056 is fully programmable for
AC and DC termination, ringer impedance and ringer threshold. The Si3056
chipset also supports billing tone detection, on and off-hook polarity
reversal detection and pulse dialing, enabling it to meet the most stringent
global PTT requirements. Other enhanced features offered in the chipset
include on and off-hook parallel phone detection, overcurrent protection, ring
validation, higher transmit/receive levels (up to +3.2 dBm), finer resolution
gain control (gain or attenuation adjustments in steps as small as 0.1 dB) and
a programmable hybrid.
Like other Silicon Laboratories DAA products, the Si3056 offers the highest
level of integration by replacing the codec, isolation transformer, relay,
opto-isolators, 2-4 wire hybrid and DC holding circuit with two 16-pin SOIC
packages and minimal external components.
Si3056 Block Diagram
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