73K324L Datasheet, PDF (1/30 Pages) List of Unclassifed Manufacturers – CCITT V.22bis, V.22, V.21, V.23, Bell 212A Single-Chip Modem

Simplifying System Integration™
73K324L
CCITT V.22bis,V.23,V.22,V.21,Bell 212A
Single-Chip Modem
DATA SHEET
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
JUNE 2008
• 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
8-BIT
µP
BUS
INTERFACE
TXD
RXD
SERIAL
INTERFACE
BUFFER
FSK
MODULATOR
DTMF,
ANSWER,
GUARD &
CALLING
TONE
GENERATOR
SCRAMBLER
DI-BIT/
QUAD-BIT
ENCODER
FIR
PULSE
SHAPER
QAM/
DPSK
MODULATOR
EQUALIZER
FILTER
ATTENUATOR
FILTER
TXA1
DEBUFFER
DESCRAMBLER
DI-BIT/
QUAD-BIT
DECODER
DIGITAL
SIGNAL
PROCESSOR
RECEIVE
FUNCTIONS
FILTER
A/D
EQUALIZER
FIXED
DEMODULATOR
TONE
DETECTION
6dB
GAIN
BOOST
PASS
BAND
FILTER
ANTI-ALIAS
FILTER
6dB
6dB
GAIN GAIN
BOOST BOOST
RXA
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© 2005, 2008 TERIDIAN Semiconductor Corporation
Rev 7.1