73K324L
CCITT V.22bis,V.23,V.22,V.21,Bell 212A
Single-Chip Modem
Simplifying System Integration™
DATA SHEET
JUNE 2008
DESCRIPTION
The 73K324L is a highly integrated single-chip
modem IC, which provides the functions, needed to
design a Quad-mode CCITT and Bell 212A
compatible modem capable of operation over dial-up
lines. The 73K324L adds V.23 capability to the
CCITT modes of TERIDIAN Semiconductor
Corporation's 73K224 one-chip modem, allowing a
one-chip implementation in designs intended for
European markets, which require this added
Modulation mode. The 73K324L offers excellent
performance and a high level of functional
integration in a single IC. The device supports
V.22bis, V.22, Bell 212A, V.21, and V.23 operating
modes,
allowing
both
synchronous
and
asynchronous operation as defined by the
appropriate standard.
The 73K324L is designed to appear to the Systems
Engineer as a microprocessor peripheral, and will
easily
interface
with
popular
one-chip
microcontrollers (80C51 typical) for control of
modem functions through its 8-bit multiplexed
address/data bus. A serial control bus is available
for applications not requiring a parallel interface. An
optional package with only the serial control bus is
also available. Data communications occurs through
a separate serial port.
(continued)
FEATURES
•
•
•
One chip Multi-mode CCITT V.22bis, V.22, V.21,
V.23 and Bell 212A compatible modem data pump
FSK (75, 300, 1200 bit/s), DPSK (600, 1200 bit/s),
or QAM (2400 bit/s) encoding
Pin and software compatible with other
TERIDIAN Semiconductor Corporation K-Series
family one-chip modems
Interfaces directly with standard
microprocessors (8048, 80C51 typical)
Serial and parallel microprocessor bus for
control
Selectable asynch/synch with internal
buffer/debuffer and scrambler/descrambler
functions
All synchronous (internal, external, slave) and
Asynchronous Operating modes
Adaptive equalization for optimum performance
over all lines
Programmable transmit attenuation (16 dB, 1 dB
steps), and selectable receive boost (+18 dB)
Call progress, carrier, answer tone, unscrambled
mark, S1, and signal quality monitors
DTMF, answer, calling, SCT and guard tone
generators
Test modes available: ALB, DL, RDL; Mark, Space
and Alternating bit pattern generators
CMOS technology for low power consumption
(100 MW @ 5 V) with power-down mode
(15 mW @ 5V)
4-wire full duplex operation in all modes
•
•
•
•
•
•
•
•
•
•
•
BLOCK DIAGRAM
DTMF,
ANSWER,
GUARD &
CALLING
TONE
GENERATOR
FSK
MODULATOR
BUFFER
SCRAMBLER
DI-BIT/
QUAD-BIT
ENCODER
8-BIT
µP
BUS
INTERFACE
FIR
PULSE
SHAPER
QAM/
DPSK
MODULATOR
FILTER
EQUALIZER
FILTER
ATTENUATOR
TXA1
DEBUFFER
DESCRAMBLER
DI-BIT/
QUAD-BIT
DECODER
DIGITAL
SIGNAL
PROCESSOR
RECEIVE
FUNCTIONS
FILTER
A/D
EQUALIZER
PASS
BAND
FILTER
ANTI-ALIAS
FILTER
RXA
TXD
RXD
SERIAL
INTERFACE
FIXED
DEMODULATOR
6dB
GAIN
BOOST
6dB
GAIN
BOOST
6dB
GAIN
BOOST
TONE
DETECTION
Page: 1 of 30
©
2005, 2008 TERIDIAN Semiconductor Corporation
Rev 7.1
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
