73K324BL
CCITT V.22bis,V.23,V.22,V.21,Bell 212A
Single-Chip Modem w/ Integrated
Hybrid
DATA SHEET
JULY 2005
DESCRIPTION
FEATURES
The 73K324BL is a highly integrated single-chip
modem IC which provides the functions needed to
construct a V.22bis compatible modem, capable of
2400 bps full-duplex operation over dial-up lines. The
73K324BL is an enhancement of the 73K324L single-
chip modem, which adds the hybrid hook switch
control, and driver to the 73K324L. The 73K324BL
integrates analog, digital, and switched-capacitor
array functions on a single chip, offering excellent
performance and a high level of functional integration
in a 32-Lead PLCC package.
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Includes features of 73K324L single-chip
modem
On chip 2-wire/4-wire hybrid driver and off
hook relay buffer
One-chip multi-mode V.22bis/V.22/V.21/V.23
and Bell 212A compatible modem data pump
FSK (300/1200 bps), DPSK (600, 1200 bps), or
QAM (2400 bps) encoding
Software compatible with other Semi-
conductor K-Series one-chip modems
The 73K324BL operates from a single +5 V supply for
low power consumption.
Interfaces directly with standard micro-
processors (80C51 typical)
Parallel or serial bus for control
The 73K324BL is designed to appear to the systems
designer as a microprocessor peripheral, and will
easily interface with popular single-chip micro-
processors (80C51 typical) for control of modem
functions through its 8-bit multiplexed address/data
bus or via an optional serial control bus. An ALE
control simplifies address demultiplexing. Data
communications normally occur through a separate
serial port.
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Selectable
asynch/synch
with
internal
buffer/debuffer and scrambler/descrambler
functions
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All asynchronous and synchronous operating
modes (internal, external, slave)
(continued)
(continued)
BLOCK DIAGRAM
DTMF,
ANSWER,
GUARD &
CALLING
TONE
OH
GENERATOR
FSK
MODULATOR
DI-BIT/
QUAD-BIT
ENCODER
BUFFER
SCRAMBLER
FILTER
FIR
QAM/
DPSK
PULSE
SHAPER
EQUALIZER
EQUALIZER
FILTER
MODULATOR
ATTENUATOR
8-BIT
µP
TXA1
TXA2
BUS
2W/4W
HYBRID
INTERFACE
FILTER
A/D
RXA
DIGITAL
SIGNAL
DI-BIT/
DEBUFFER
DESCRAMBLER
QUAD-BIT
DECODER
PASS
BAND
PROCESSOR
RECEIVE
ANTI-ALIAS
FILTER
FILTER
FUNCTIONS
FIXED
DEMODULATOR
AGC
GAIN
BOOST
TXD
RXD
SERIAL
INTERFACE
TONE
DETECTION
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© 2005 TERIDIAN Semiconductor Corporation
Rev 6.0