73K224BL Datasheet, PDF (1/33 Pages) List of Unclassifed Manufacturers – Single-Chip Modem w/ Integrated Hybrid

73K224BL
V.22bis/V.22/V.21/Bell 212A/103
Single-Chip Modem w/ Integrated Hybrid
DESCRIPTION
The 73K224BL is a highly integrated single-chip
modem IC which provides the functions needed to
construct a V.22bis compatible modem, capable of
2400 bit/s full-duplex operation over dial-up lines.
The 73K224BL is an enhancement of the 73K224L
single-chip modem which adds the hybrid hook
switch control, and driver to the 73K224L. The
73K224BL 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 and 44-Lead TQFP
package.
The 73K224BL operates from a single +5 V supply
for low power consumption.
The 73K224BL 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.
(continued)
FEATURES
April 2000
• Includes features of 73K224L single-chip
modem
• On chip 2-wire/4-wire hybrid driver and off
hook relay buffer driver
• One-chip multi-mode V.22bis/V.22/V.21 and
Bell 212A/103 compatible modem data pump
• FSK (300 bit/s), DPSK (600, 1200 bit/s), or
QAM (2400 bit/s) encoding
• Software compatible with other TDK
Semiconductor K-Series one-chip modems
• Interfaces directly with standard micro-
processors (80C51 typical)
• Parallel or serial bus for control
• Selectable internal buffer/debuffer and
scrambler/descrambler functions
• All asynchronous and synchronous
operating modes (internal, external, slave)
(continued)
BLOCK DIAGRAM
OH
8-BIT
µP
BUS
INTERFACE
TXD
RXD
SERIAL
INTERFACE
FSK
MODULATOR
DTMF,
ANSWER,
GUARD &
CALLING
TONE
GENERATOR
BUFFER
SCRAMBLER
DI-BIT/
QUAD-BIT
ENCODER
FIR
PULSE
SHAPER
QAM/
DPSK
MODULATOR
EQUALIZER
FILTER
FILTER
ATTENUATOR
DEBUFFER
DESCRAMBLER
DI-BIT/
QUAD-BIT
DECODER
DIGITAL
SIGNAL
PROCESSOR
RECEIVE
FUNCTIONS
TONE
DETECTION
FILTER
A/D
EQUALIZER
FIXED
DEMODULATOR
FILTER
AGC
2W/4W
HYBRID
GAIN
BOOST
FILTER
TXA1
TXA2
RXA