V2.0October 2002
Advance data Sheet
© Silver Telecom 2002
DESCRIPTION
The
Ag2120
is
a
self-contained
highly
integrated PSTN Interface Circuit in a single
SIL or DIL Module.
In addition to the features listed, the Ag2120
allows
flexible
programming
of
many
functions, including the dc voltage mask and
impedances. The Ag2120 meets international
safety and regulatory requirements.
The device requires a minimum of external
components and has been specified for ease
of use, to reduce time to market.
The Ag2120 is designed for all applications,
including those where there is a high level of
common mode interference, such as PABX,
long loop applications and systems without a
ground.
Ag2120
F U L L Y F E AT URE D
P S T N IN T E RF ACE
FEATURES
• A highly featured PSTN Interface (COIC,
FXO, DAA, Trunk Interface) in a single DIL
or 12mm high SIL device.
• +5V or +3.3V supply.
• Transformer
isolation
providing
high
common mode rejection (CMRR) for use in
un-grounded systems.
• Highly integrated with on board loop switch
and integral diode bridge.
• Loop start circuit, ringing detect and loop
current detection. Parallel phone detect.
• Tip-ring polarity reversal detect (for Caller
Line ID and remote metering) and on-hook
reception.
• Meets requirements of EN60950/UL1950,
and FCC Pt68.
Low cost power cross
protection.
• Programmable d.c. mask, line and network
impedances.
• Silver Telecom “design-in” assistance.
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TRUNK
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