73K224BL-IGT データシートの表示（PDF） - TDK Corporation

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73K224BL-IGT

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

TDK Corporation 

73K224BL

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

Single-Chip Modem w/ Integrated Hybrid

DESCRIPTION

The 73K224BL 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 73K224BL is an enhancement of the 73K224L

single-chip modem which adds the hybrid hook

switch control, and driver to the 73K224L. The

73K224BL integrates analog, digital, and switched-

capacitor array functions on a single chip, offering

excellent performance and a high level of functional

integration in a 32-Lead PLCC and 44-Lead TQFP

package.

The 73K224BL operates from a single +5 V supply

for low power consumption.

The 73K224BL is designed to appear to the systems

designer as a microprocessor peripheral, and will

easily interface with popular single-chip micro-

processors (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 simplifies address demultiplexing. Data

communications normally occur through a separate

serial port.

(continued)

FEATURES

April 2000

• Includes features of 73K224L single-chip

modem

• On chip 2-wire/4-wire hybrid driver and off

hook relay buffer driver

• 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

• Software compatible with other TDK

Semiconductor K-Series one-chip modems

• Interfaces directly with standard micro-

processors (80C51 typical)

• Parallel or serial bus for control

• Selectable internal buffer/debuffer and

scrambler/descrambler functions

• All asynchronous and synchronous

operating modes (internal, external, slave)

(continued)

BLOCK DIAGRAM

OH

8-BIT

µP

BUS

INTERFACE

TXD

RXD

SERIAL

INTERFACE

FSK

MODULATOR

DTMF,

ANSWER,

GUARD &

CALLING

TONE

GENERATOR

BUFFER

SCRAMBLER

DI-BIT/

QUAD-BIT

ENCODER

FIR

PULSE

SHAPER

QAM/

DPSK

MODULATOR

EQUALIZER

FILTER

FILTER

ATTENUATOR

DEBUFFER

DESCRAMBLER

DI-BIT/

QUAD-BIT

DECODER

DIGITAL

SIGNAL

PROCESSOR

RECEIVE

FUNCTIONS

TONE

DETECTION

FILTER

A/D

EQUALIZER

FIXED

DEMODULATOR

FILTER

AGC

2W/4W

HYBRID

GAIN

BOOST

FILTER

TXA1

TXA2

RXA

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