73K321L-IH TDK Corporation, 73K321L-IH Datasheet
73K321L-IH
Manufacturer Part Number
73K321L-IH
Description
Manufacturer
TDK Corporation
Datasheet
1.73K321L-IH.pdf
(24 pages)
Specifications of 73K321L-IH
Case
PLCC
Available stocks
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73K321L-IH
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73K321L-IH
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DESCRIPTION
The 73K321L is a highly integrated single-chip
modem IC which provides the functions needed to
construct a CCITT V.23 and V.21 compatible
modem, capable of 0-300 bit/s full-duplex or 0-1200
bit/s half-duplex operation over dial-up telephone
lines. The 73K321L provides 1200 bit/s operation in
V.23 mode and 300 bit/s in V.21 mode. The
73K321L also can both detect and generate the
2100 Hz answer tone needed for call initiation. The
73K321L integrates analog, digital, and switched-
capacitor array functions on a single substrate,
offering excellent performance and a high level of
functional integration in a single 28-pin DIP or PLCC
package. The 73K321L operates from a single +5V
supply with very low power consumption.
The
modulator/demodulator functions, call progress and
handshake tone monitor test modes, and a tone
generator capable of producing DTMF, answer,
calling tones. The 73K321L is designed to appear to
the
peripheral, and will easily interface with popular one-
chip microprocessors (80C51 typical) for control of
modem functions through its 8-bit multiplexed
address/data bus or via an optional serial control
bus.
demultiplexing.
through a separate serial port only.
systems
An
73K321L
AD0-AD7
RESET
ALE
TXD
ALE
RXD
W R
CS
INT
RD
designer
control
Data
includes
CONTROL
CONTROL
STATUS
communications
BUFFER
WRITE
LOGIC
READ
LOGIC
DATA
line
AND
BUS
as
simplifies
a
microprocessor
CONTROL
STATUS
SERIAL
the
PORT
DATA
8-BIT
BUS
FOR
AND
FOR
(continued)
address
occurs
FSK
BLOCK DIAGRAM
GENERATOR
PATTERNS
CLOCK
ALB,DLB
TESTS:
RDLB
FEATURES
One-chip CCITT V.23 and V.21 standard
compatible modem data pump
Full-duplex operation at 0-300 bit/s (V.21) or
0-1200 bit/s ( V .23) forward channel with or
without 0-75 bits/s back channel
Full Duplex 0-1200 bit/s (V.23) in 4-wire mode
Pin and software compatible with other TDK
Semiconductor Corporation K-Series 1-chip
modems
Interfaces
processors (8048, 80C51 typical)
Serial port for data transfer
Call progress, carrier, precise answer tone
(2100 Hz), calling tone (1300 Hz) and FSK
mark detectors
DTMF generator
Test modes available: ALB, DL, RDL, Mark,
Space, Alternating bit patterns
Precise automatic gain control allows 45 dB
dynamic range
CMOS
consumption using 60 mW @ 5V from a
single power supply
POWER
DEMODULATOR
MODULATOR/
FUNCTIONS
DIALING
DETECT
SMART
FSK
&
technology
directly
Single-Chip Modem
GENERATORS
TRANSMIT
RECEIVE
DTMF &
FILTER
FILTER
TONE
CCITT V.23, V.21
with
for
standard
T X A
RXA
73K321L
low
April 2000
micro-
power
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