73K224L-IGT ETC, 73K224L-IGT Datasheet

73K224L-IGT

Manufacturer Part Number

73K224L-IGT

Description

V.22bis/V.22/V.21/ Bell 212A/Bell 103 Single-Chip Modem

Manufacturer

ETC

Datasheet

1.73K224L-IGT.pdf (32 pages)

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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

and 44-pin TQFP package. This device supports

V.22bis, V.22, V.21, Bell 212A and Bell 103 modes of

operation,

asynchronous

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

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

BLOCK DIAGRAM

demultiplexing.

allowing

communication.

both

Data

synchronous

The

communications

73K224L

(continued)

and

V.22bis/V.22/V.21/ Bell 212A/Bell 103

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 TDK

Semiconductor

modems

Interfaces directly with standard microcontrollers

(80C51 typical)

Parallel microcontroller bus for modem control and

status monitoring functions

Selectable

buffer/debuffer

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

asynch/synch

Single-Chip Modem

Corporation

and

scrambler/descrambler

K-Series

with

73K224L

April 2000

internal

1-chip

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