73M1822 Product Brief
73M1822 MicroDAA™
The Teridian 73M1822 is a single chip package of the 73M1922 chip set that uses
Teridian’s unique data access arrangement (DAA) function designed for voice band data
and fax modems.
The 73M1822 MicroDAA™ is the first single chip silicon direct access arrangement for
data/fax modem and voice applications. It provides a serial MAFE interface to popular DSP/
host processors to implement a globally compliant cost effective soft modem solution.
Key Applications
ꢀ
Highꢀspeedꢀvoiceꢀbandꢀdataꢀmodems
The 73M1822 offers software programmable AC/DC terminations, types I and II caller ID,
billing tone filter, ring detection, polarity reversal detection, line voltage and current moni-
toring, call progress monitoring and pulse dialing.
ꢀ
SatelliteꢀSetꢀTopꢀBoxes
ꢀ
Fax/MultifunctionꢀPeripheralsꢀ(MFP)
ꢀ
PointꢀofꢀSaleꢀTerminalsꢀ
Internally the device constitutes two separate functional units that provide the necessary
functionality and the protection required for worldwide homologation.
ꢀ
Voicemailꢀsystems
ꢀ
Embeddedꢀmodemꢀapplicationsꢀsuchꢀ
asꢀmedicalꢀandꢀindustrialꢀtelemetry.
With better than 2.0 in2 (10.2 cm2) board area and a very competitive BOM cost, a
complete universal DAA may be realized with only a few standard external components.
Suitable applications for the 73M1822 include set top boxes, low to high speed (PCM)
voice band data modems, point of sales terminals, fax and multi-function peripherals,
text telephony, embedded telemetry (industrial and medical) etc.
Based on an innovative and patented technology which sets new standards in reliability
and cost. A small pulse transformer forms a digital isolation barrier, transferring both
power and data to the PSTN line side components. This results in reliable performance
in presence of EMI as a tolerance to line voltage variations by providing power to the line
side across the barrier thus enhancing overall performance.
Overall the 73M1822 provides a highly efficient solution for high performance.
Teridian Semiconductor Corporation is a modem technology pioneer and Silicon DAA
patent holder with a long history of development and innovation including the capacitive
isolation barrier technology licensed to 3rd parties and has been globally deployed in low
speed and high speed analog modems.
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
