73M1866B/73M1966B
MicroDAA™ with PCM Highway
DATA SHEET
April 2010
Simplifying System Integration™
DS_1x66B_001
DESCRIPTION
Through its PCM interface, the 73M1966B can
be connected to other PCM enabled devices
such as POTS codecs, ISDN codecs, E1/T1
framers, etc.
The 73M1866B and 73M1966B use the Teridian
patented Data Access Arrangement function
(MicroDAA®) designed exclusively for Foreign-
Exchange-Office (FXO) in Voice-over-IP (VoIP)
applications. These devices provide much of the
circuitry required to connect PCM formatted
voice channels to a PSTN via a two-wire twisted
pair interface. The package options provide the
necessary functional programmability and
protection required for easy worldwide
Additional DAA functions supported by the
73M1x66B devices include a call progress
monitor, Caller ID Type I and II, ring detection,
pulse dialing, billing tone detection and polarity
reversal detection.
APPLICATIONS
homologation.
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Computer Telephony
VOIP Equipment
PBX Systems
Internet Appliances
Voicemail Systems
POTS Termination Equipment
The family of devices consists of the 73M1866B
and the 73M1966B. The 73M1866B MicroDAA
is the world’s first single-package silicon Data
Access Arrangement (DAA). Suitable
applications for the 73M1866B and 73M1966B
devices include VoIP equipment that must
provide connectivity to the PSTN for purposes of
guaranteeing emergency service calling,
redundancy for supplementary connectivity for
voice, and maintenance services.
FEATURES
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PCM highway data interface supporting both
slave and master modes
PCM highway interface supporting both E-1
and T-1
SPI control interface, with daisy chain
support for up to 16 devices
Designed to meet global DAA compliance
FCC, ETSI ES 203 021-2, JATE and other
PTT standards.
The 73M1966B device set consists of the
73M1906B Host-Side Device that provides digital
data, control interfaces and power to the
73M1916 Line-Side Device.
These devices are 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 method results in reliable
operation in the presence of EMI and a tolerance
to line voltage variations by providing power to
the Line-Side Device across the barrier. The
devices also support the ability to provide up to
an additional +6 dB of analog gain to the line-
side transmit and +3 dB in the receive signal
paths. The device supports transmit and receive
digital gain ranging from –18 dB to +7.375 dB by
increments of 0.125 dB.
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8 kHz and 16 kHz sample rates
16-bit linear mode
TX and RX gains adjustable in 0.125 dB
increments
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μ-Law, A-law ITU-T Recommendation G.711
compliant compander operation
Automatic clock rate detection
Low power modes
Polarity Reversal detection
GPIO for user-configurable I/O ports
Call Progress Monitor
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Isolation up to 6 kV
THD -80 dB
The digital side provides a PCM highway
interface with automatic clock rate detection.
With an 8-kHz sampling rate, the devices include
an ITU-T G.711 compliant codec with selectable
µ-law and A-law companding modes. The
devices also provide a 16-bit linear mode, which
is suitable for interfacing with wide band codecs,
as well as 16 kHz sampling rate. Device control
is performed over an SPI interface. The SPI
supports daisy chain operation.
5 V tolerant I/O on selected pins
3.0 V – 3.6 V operating voltage
Industrial temperature range (-40 °C to +85 °C)
5x5 mm 32-pin QFN or 20-pin TSSOP
packages
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RoHS compliant (6/6) lead-free package
Rev. 1.6
© 2010 Teridian Semiconductor Corporation
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