73K224L Datasheet, PDF (1/32 Pages) TDK Electronics – V.22bis/V.22/V.21/ Bell 212A/Bell 103 Single-Chip Modem

73K224L
V.22bis/V.22/V.21/ Bell 212A/Bell 103
Single-Chip Modem
DESCRIPTION
The 73K224L 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
73K224L offers excellent performance and a high
level of functional integration in a single 28-pin DIP
and 44-pin TQFP package. This device supports
V.22bis, V.22, V.21, Bell 212A and Bell 103 modes of
operation, allowing both synchronous and
asynchronous communication. The 73K224L is
designed to appear to the systems designer as a
microprocessor peripheral, and will easily interface
with popular single-chip microprocessors (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 line simplifies
address demultiplexing. Data communications
normally occur through a separate serial port. The
73K224L is pin and software compatible with the
73K212L and 73K222L single-chip modem ICs,
allowing system upgrades with a single component
change.
The 73K224L operates from a single +5V supply for
low power consumption.
The 73K224L is ideal for use in either free-standing or
integral system modem products where full-duplex
(continued)
BLOCK DIAGRAM
April 2000
FEATURES
• 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
• Pin and software compatible with other TDK
Semiconductor Corporation K-Series 1-chip
modems
• Interfaces directly with standard microcontrollers
(80C51 typical)
• Parallel microcontroller bus for modem control and
status monitoring functions
• Selectable
asynch/synch
with
internal
buffer/debuffer and scrambler/descrambler
functions
• All synchronous and asynchronous operating
modes (internal, external, slave)
• Adaptive equalization for optimum performance
over all lines
• Programmable transmit attenuation (16 dB, 1 dB
steps), selectable receive boost (+18 dB)
• Call progress, carrier, answer tone, unscrambled
mark, S1, and signal quality monitors
• DTMF, answer and guard tone generators
• Test modes available: ALB, DL, RDL, Mark, Space,
Alternating bit, S1 pattern
• CMOS technology for low power consumption
(typically 100 mW @ 5V) with power-down mode
(15 mW @ 5V)
• TTL and CMOS compatible inputs and outputs