73K222BL
V.22, V.21, Bell 212A, 103
Single-Chip Modem
Simplifying System Integration™
DATA SHEET
JUNE 2008
DESCRIPTION
The 73K222BL is a highly integrated single-chip
modem IC which provides the functions needed to
construct a CCITT V.22, V.21, Bell 212A and Bell
103, compatible modem, capable of 1200 bit/s full-
duplex operation over dial-up lines. The 73K222BL
is an enhancement of the 73K222AL single-chip
modem, which adds the hybrid hook switch control,
and driver to the 73K222AL. In Bell 212A mode, the
73K222BL provides the normal Bell 212A and Bell
103 functions and employs a 2225 Hz answer tone.
The 73K222BL in V.22 mode produces either 550 or
1800 Hz guard tone, recognizes and generates a
2100 Hz answer tone, and allows 600 bit/s V.22 or
0-300 bit/s V.21 operation. The device integrates
analog, digital, and switched-capacitor array
functions on a single substrate, offering excellent
performance and a high level of functional
integration in a 32-Lead package. It operates from a
single +5 V supply.
The 73K222BL includes the DPSK and FSK
modulator/demodulator functions, call progress and
handshake tone monitor and a tone generator
capable of tones required for European applications.
This device supports V.22 (except mode v) and V. 21
modes of operation, allowing both synchronous and
asynchronous communication. Test features such as
analog loop, digital loop, and remote digital loopback
are supported. Internal pattern generators are also
(continued)
included for self-testing.
FEATURES
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Includes features of 73K222AL single-chip
modem
One-chip CCITT V.22, V.21, Bell 212A and Bell
103 standard compatible modem data pump
Full-duplex operation at 0-300 bit/s (FSK) or
600 and 1200 bit/s (DPSK)
On chip 2-wire/4-wire hybrid driver and off-
hook relay buffer driver
Serial or parallel microcontroller control
interface
Interfaces
directly
with
standard
microcontroller (8048, 80C51 typical)
Serial port for data transfer
Both synchronous and asynchronous modes
of operation including V.22 extended
overspeed
Call progress, carrier, precise answer tone
(2100 or 2225 Hz), and long loop detectors
DTMF, and 550 or 1800 Hz guard tone
generators
Test modes available: ALB, DL, RDL, Mark,
Space, Alternating bit patterns
Precise automatic gain control allows 45 dB
dynamic range
CMOS technology for low power consumption
using 60 mW @ 5 V
Single +5 V supply
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BLOCK DIAGRAM
OH
DATA
BUS
BUFFER
DTMF &
TONE
GENERATORS
FSK
MODULATOR/
DEMODULATOR
AD0-AD7
8-BIT
BUS
FOR
RD
WR
ALE
CS
RESET
READ
WRITE
CONTROL
LOGIC
CONTROL
AND
STATUS
DIGITAL
PROCESSING
PSK
MODULATOR/
DEMODULATOR
TRANSMIT
FILTER
RECEIVE
FILTER
2W/4W
HYBRID
TXA1
TXA2
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
XTL1
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XTL2
GND
VREF
VDD
ISET
CLK
©
2005, 2008 TERIDIAN Semiconductor Corporation
Rev 7.2
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
