73K302L-IP
| Model | 73K302L-IP |
| Description | Single-Chip Modem |
| PDF file | Total 29 pages (File size: 284K) |
| Chip Manufacturer | TDK |
73K302L
Bell 212A, 103, 202
Single-Chip Modem
April 2000
DESCRIPTION
The 73K302L is a highly integrated single-chip
modem IC which provides the functions needed to
construct a Bell 202, 212A and 103 compatible
modem. The 73K302L is an enhancement of the
73K212L single-chip modem with Bell 202 mode
features added. The 73K302L is capable of 1200 or
0-300 bit/s full-duplex operation over dial-up lines.
4-wire full-duplex capability and a low speed back
channel are also provided in Bell 202 mode. The
73K302L recognizes and generates a 900 Hz soft
carrier turn-off tone, and allows 103 for 300 bit/s
FSK operation. The 73K302L 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 73K302L
operates from a single +5V supply with very low
power consumption.
The 73K302L includes the DPSK and FSK
modulator/demodulator functions, call progress and
handshake tone monitors, test modes, and a tone
generator capable of producing DTMF, answer, and
900 Hz soft carrier turn-off tone. This device
supports Bell 202, 212A and 103 modes of
operation, allowing both synchronous and
(continued)
FEATURES
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One-chip Bell 212A, 103 and 202S/T standard
compatible modem data pump
Full-duplex operation at 0-300 bit/s (FSK), 1200 bit/s
(DPSK) or 0-1200 bit/s (FSK) forward channel with or
without 0-150 bit/s back channel
Full-duplex 4-wire operation in Bell 202 mode
Pin and software compatible with other TDK
Semiconductor
Corporation
K-Series
1-chip
modems
Interfaces directly with standard microprocessors
(8048, 80C51 typical)
Serial port for data transfer
Both synchronous and asynchronous modes of
operation
Call progress, carrier, precise answer tone
(2225 Hz), soft carrier turn-off (SCT), and FSK mark
detectors
DTMF, answer, and SCT tone generators
Test modes available: ALB, DL, RDL, Mark, Space,
Alternating bit patterns
CMOS technology for low power consumption using
60 mW @ 5V from a single power supply
BLOCK DIAGRAM
AD0-AD7
DATA
BUS
BUFFER
8-BIT
BUS
FOR
RD
WR
ALE
CS
RESET
READ
WRITE
CONTROL
LOGIC
CONTROL
AND
STATUS
DIGITAL
PROCESSING
PSK
MODULATOR/
DEMODULATOR
FSK
MODULATOR/
DEMODULATOR
DTMF &
TONE
GENERATORS
TRANSMIT
FILTER
RECEIVE
FILTER
TXA
RXA
INT
STATUS
AND
CONTROL
LOGIC
TXD
RXD
SERIAL
PORT
FOR
DATA
TESTS:
ALB, DLB
RDLB
PATTERNS
CLOCK
GENERATOR
SMART
DIALING
&
DETECT
FUNCTIONS
POWER
RXCLK
EXCLK
TXCLK
CLK
XTL1
XTL2
GND
VREF
VDD
ISET
