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MC33219A

更新时间： 2024-11-23 00:01:07
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA /
页数 文件大小 规格书
29页 306K
描述
VOICE SWITCHED SPEAKERPHONE CIRCUIT

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MC33219A 数据手册

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Order this document by MC33219A/D  
VOICE SWITCHED  
The Motorola MC33219A 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. The  
volume control can be implemented with a potentiometer.  
SPEAKERPHONE CIRCUIT  
SEMICONDUCTOR  
TECHNICAL DATA  
The MC33219A can be operated from a power supply, or from the  
telephone line, requiring typically 3.2 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.  
The MC33219A is available in a 24 pin narrow body DIP, and a wide body  
SOIC package.  
24  
1
P SUFFIX  
PLASTIC PACKAGE  
CASE 724  
• Supply Voltage Range: 2.7 to 6.5 V  
• Attenuator Range: 53 dB  
• Background Noise Monitor for Each Path  
• 2 Point Signal Sensing  
24  
1
DW SUFFIX  
PLASTIC PACKAGE  
CASE 751E  
• Volume Control Range: Typically 40 dB  
• Microphone and Receive Amplifiers Pinned Out for Flexibility  
• Microphone Amplifier can be Muted  
• Mute and Chip Disable are Logic Level Inputs  
• Chip Deselect Pin Powers Down the Entire IC  
• Ambient Operating Temperature: –40 to +85°C  
• 24 Pin Narrow Body (300 mil) DIP and 24 Pin SOIC  
PIN CONNECTIONS  
CP2  
XDI  
CPT  
TLI  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
V
CC  
2
TAO  
TAI  
3
4
MCO  
MCI  
Simplified Block Diagram  
Transmit  
Out  
TLO  
5
Microphone  
V
6
VLC  
MUTE  
RXI  
B
C
7
T
Mute  
V
B
T
Attenuator  
x
CD  
NC  
8
V
B
9
RXO  
RAI  
CPR  
RLI  
10  
11  
12  
BNM  
Attenuator Control  
RAO  
GND  
RLO  
BNM  
Vol  
Cont  
DTD  
(Top View)  
V
B
CD  
CC  
R
Attenuator  
x
V
V
B
Reg.  
ORDERING INFORMATION  
Operating  
V
B
MC33219A  
Temperature Range  
Device  
Package  
Receive  
In  
Speaker  
Amplifier  
MC33219ADW  
MC33219AP  
SOIC  
Speaker  
T
= – 40° to +85°C  
A
This device contains 384 active transistors.  
Plastic DIP  
Motorola, Inc. 1995  
1234567...29

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