73K224L Datasheet, PDF (1/31 Pages) TDK Electronics – V.22bis/V.22/V.21/ Bell 212A/Bell 103 Single-Chip Modem

Simplifying System Integration™
73K224L
V.22bis, V.22, V.21, Bell 212A, 103
Single-Chip Modem
DATA SHEET
JUNE 2008
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
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)
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 TERIDIAN
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
BLOCK DIAGRAM
FSK
MODULATOR
DTMF,
ANSWER,
GUARD &
CALLING
TONE
GENERATOR
8-BIT
P
BUS
I/F
TXD
RXD
SERIAL
I/F
Page: 1 of 31
BUFFER
SCRAMBLER
DIBIT/
QUADBIT
ENCODER
FIR
PULSE
SHAPER
QAM/
+
DPSK
MODULATOR
EQUALIZER
FILTER
+
ATTEN
TXA
FILTER
DEBUFFER
DE-
SCRAMBLER
DIBIT/
QUADBIT
DECODER
DIGITAL
SIGNAL
PROCESSOR
RECEIVE
FUNCTIONS
FILTER
A/D
EQUALIZER
FIXED
DEMOD
AGC
FILTER
FILTER
GAIN BOOST
RXA
TONE DETECTION
© 2005, 2008 TERIDIAN Semiconductor Corporation
Rev 7.1