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MC33218ADW

更新时间： 2024-09-23 11:09:19
品牌 Logo 应用领域
飞思卡尔 - FREESCALE 电信集成电路微处理器光电二极管
页数 文件大小 规格书
28页 481K
描述
Voice Switched Speakerphone with Microprocessor Interface

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MC33218ADW 数据手册

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Order this document by MC33218A/D  
Freescale Semiconductor, Inc.  
VOICE SWITCHED  
SPEAKERPHONE WITH  
µPROCESSOR INTERFACE  
The Motorola MC33218A Voice Switched Speakerphone Circuit  
incorporates the necessary amplifiers, attenuators, level detectors, and  
control algorithm to form the heart of a high quality hands–free  
speakerphone system. Included are a microphone amplifier with mute,  
transmit and receive attenuators, a background monitoring system for both  
the transmit and receive paths, and level detectors for each path. An AGC  
system reduces the receive gain on long lines where loop current and power  
are in short supply. A dial tone detector prevents fading of dial tone. A Chip  
Disable pin permits conserving power when the circuit is not in use.  
Additionally, the MC33218A has a serial data port which permits  
microprocessor control of the receive volume level, microphone mute,  
attenuator range, and selection of transmit, receive, idle or normal modes.  
The data port can be operated at up to 1.0 MHz.  
SEMICONDUCTOR  
TECHNICAL DATA  
24  
1
P SUFFIX  
PLASTIC PACKAGE  
CASE 724  
The MC33218A can be operated from a power supply, or from the  
telephone line, requiring typically 4.6 mA. It can be used in conjunction with a  
variety of speech networks. Applications include not only speakerphones,  
but intercoms and other voice switched devices.  
• Supply Voltage Range: 2.7 to 6.5 V  
24  
• Attenuator Range: 53 or 27 dB (Selectable)  
• 2 Point Sensing with Background Noise Monitor in Each Path  
• Microprocessor Port for Control of:  
Volume Control (40 dB Range over 16 Levels)  
Mute Microphone Amplifier  
1
DW SUFFIX  
PLASTIC PACKAGE  
CASE 751E  
Force to Receive, Transmit, or Idle Modes  
Attenuator Range Selection (27 or 53 dB)  
PIN CONNECTIONS  
• Chip Disable Pin Powers Down the Entire IC  
• 24 Pin Narrow Body (300 mil) DIP and 24 Pin SOIC  
CP2  
XDI  
CPT  
TLI  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
V
CC  
2
TAO  
MCO  
MCI  
3
Simplified Block Diagram  
4
Transmit  
Out  
TLO  
5
POR  
DR  
Microphone  
V
6
B
Receive  
In  
C
7
DATA  
CLK  
RXI  
T
V
B
T
Attenuator  
x
V
B
CD  
NC  
8
9
V
B
BNM  
Attenuator Control  
CPR  
RLI  
10  
11  
12  
RXO  
RAO  
GND  
CLK  
DATA  
POR  
Serial  
Port  
DTD  
RLO  
DR  
CD  
CC  
BNM  
R
Attenuator  
x
V
(Top View)  
B
V
Reg.  
V
B
MC33218A  
ORDERING INFORMATION  
Operating  
Temperature Range  
Device  
Package  
Speaker  
Amplifier  
Speaker  
MC33218ADW  
MC33218AP  
SO–24L  
T
= – 40° to +85°C  
A
This device contains 610 active transistors.  
Plastic DIP  
This document contains information on a new product. Specifications and information herein are  
subject to change without notice.  
Motorola, Inc. 1995  
For More Information On This Product,  
Go to: www.freescale.com  
1234567...28

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