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73K324L-IP Datasheet

  • 73K324L-IP

  • CCITT V.22bis, V.22, V.21, V.23, Bell 212A Single-Chip Modem

  • 31頁

  • ETC

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73K324L
CCITT V.22bis, V.22, V.21, V.23, Bell 212A
Single-Chip Modem
April 2000
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 TDK 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
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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
TDK 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
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BLOCK DIAGRAM
DTMF,
ANSWER,
GUARD &
CALLING
TONE
GENERATOR
FSK
MODULATOR
8 - BIT
mP
BUS
I/F
BUFFER
SCRAMBLER
DIBIT/
QUADBIT
ENCODER
FIR
PULSE
SHAPER
QAM/
DPSK
MODULATOR
+
TXA
EQUALIZER
FILTER
+
ATTEN
FILTER
DEBUFFER
DE-
SCRAMBLER
DIBIT/
QUADBIT
DECODER
FILTER
DIGITAL
SIGNAL
PROCESSOR
RECEIVE
FUNCTIONS
A/D
EQUALIZER
FIXED
DEMOD
AGC
FILTER
6 dB
GAIN
BOOST
6 dB
GAIN BOOST
RXA
FILTER
TXD
SERIAL
I/F
RXD
TONE DETECTION

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