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73K222AU-IH fiches techniques PDF

ETC - Single-Chip Modem Modem with UART

Numéro de référence 73K222AU-IH
Description Single-Chip Modem Modem with UART
Fabricant ETC 
Logo ETC 





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73K222AU-IH fiche technique
DESCRIPTION
The 73K222AU is a compact, high-performance
modem which includes a 8250A/16C450 compatible
UART with the 1200 bit/s modem function on a
single chip. Based on the 73K222L 5V low power
CMOS modem IC, the 73K222AU is the perfect
modem/UART component for integral modem
applications. It is ideal for applications such as
portable terminals and laptop computers. The
73K222AU is the first fully featured modem IC which
can function as an intelligent modem in integral
applications without requiring a separate dedicated
microcontroller. It provides for data communication
at 1200, 600, and 300 bit/s in a multi-mode manner
that allows operation compatible with both Bell
212A/103 and CCITT V.22/V.21 standards. The
digital interface section contains a high speed
version of the industry standard 8250A/16C450
UART, commonly used in personal computer
products. A unique feature of the 73K222AU is that
the UART section can be used without the modem
function, providing an additional asynchronous port
at no added cost. The 73K222AU is designed in
CMOS technology and operates from a single +5V
supply. Available packaging includes 40-pin DIP or
44-pin PLCC for surface mount applications.
73K222AU
Single-Chip Modem
Modem with UART
FEATURES
April 2000
Modem/UART combination optimized for
integral bus applications
Includes features of 73K222L single-chip modem
Fully compatible 16C450/8250 UART with
8250B or 8250A selectable interrupt emulation
High speed UART will interface directly with
high clock rate bus with no wait states
Single-port mode allows full modem and
UART control from CPU bus, with no
dedicated microprocessor required
Dual-port mode suits conventional designs
using local microprocessor for transparent
modem operation
Complete modem functions for 1200 bit/s (Bell
212A, V.22) and 0-300 bit/s (Bell 103, V.21)
Includes DTMF generator, carrier, call-
progress and precise answer-tone detectors
for intelligent dialing capability
On chip 2-wire/4-wire hybrid driver and off-
hook relay buffer
Speaker output with four-level software driven
volume control
Low power CMOS (40 mW) with power down
mode (15 mW)
Operates from single +5V supply
BLOCK DIAGRAM
TXD
XTL1 XTL2 CLK
UD0
UD1
UD2
UD3
UD4
UD5
UD6
UD7
UA0
UA1
UA2
1.8432 MHz
8250A / 16C450
UART
INTERNAL DATA
73K222AL
2W/4W
HYBRID
2
INT OUT1
RXD-INPUT
OH
RELAY
DRIVER
TXA1
TXA2
RXA
SPKR
( ) / MA0
( ) / MA1
(UA3) / MA2
DATA / ( )
/( )
/ (N/C)
( ) / DCLK
( )/
INTRPT ( ) PRST RESET RXD
VDD VREF GND ISET STNDLN

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