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The Si3054 is an integrated silicon direct access arrangement (DAA) with an
AC-Link interface that offers global compliance through a programmable
telephone line interface.
The chipset (Si3054 and Si3018) is fully programmable for AC and DC
termination, ringer impedance and ringer threshold and it supports billing
tone detection, polarity reversal and pulse dialing, enabling it to meet the
most stringent global PTT requirements. The Si3054 offers a number of enhanced
features including ring validation, integrated call progress, speaker driver,
external 14.31818 MHz clock support, internal PnP IDs, SDATA_IN switching and
system lock-up protection. The small number of external components needed with
the Si3054 allows new types of combo-function cards to be realized in very
small form factors.
Like other Silicon Laboratories DAA products, the Si3054 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 or
TSSOP packages and minimal external components.
Si3054 Block Diagram
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