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MC34118 datasheet，免提电话使用手册

更新时间：2019-09-13 16:17:53 大小：298K 上传用户：gaojujie查看TA发布的资源 标签：MC34118 下载积分：2分 评价赚积分 （如何评价?） 打赏 收藏 评论(0) 举报

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MC34118手册免提电话使用手册，引脚说明等等资料

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文件名 大小
MC341_datasheet.pdf 298K

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UNISONIC TECHNOLOGIES CO., LTD  
MC34118  
LINEAR INTEGRATED CIRCUIT  
VOICE SWITCHED  
SPEAKER-PHONE CIRCUIT  
SOP-28  
„
DESCRIPTION  
As a voice switched speaker-phone integrated circuit, the UTC  
MC34118 includes the necessary amplifiers, attenuators, level  
detectors and control algorithm.  
DIP-28  
To form the UTC MC34118’s internal circuit, there is an internal  
microphone amplifier with adjustable gain and mute control, internal  
transmit and Receive attenuators (operate in a complementary  
manner), level detectors at both input and output of both attenuators,  
and background noise monitors for both the transmit and receive  
channels.  
SDIP-28  
The dial tone can be pretended from being attenuated by the  
receive background noise monitor circuit by a dial tone detector.  
There are also two line driver amplifiers which can be used to form a  
hybrid network in conjunction with an external coupling transformer. A  
high-pass filter can be used for other filtering functions, and especially  
to filter out 60Hz noise in the receive channel.  
Lead-free:  
Halogen-free: MC34118G  
MC34118L  
The UTC MC34118 which requiring typically 5mA may be  
operated from a power supply, or it can be powered from the  
telephone line.  
„
FEATURES  
* Attenuator gain range: 52dB (between Transmit and Receive)  
* For line-powered applications : 3~6.5V low voltage operation  
* For improved sensitivity :4-point signal sensing  
* For Transmit and Receive paths: background noise monitors  
* External resistors set microphone amplifier gain  
* Mute function included  
* Chip disable: active or standby operation  
* During dial tone presence: dial tone detector to inhibit receive idle  
mode  
„
ORDERING INFORMATION  
Ordering Number  
Package  
Packing  
Normal  
Lead Free Plating  
MC34118L-D28-T  
MC34118L-E28-T  
MC34118L-S28-T  
MC34118L-S28-R  
Halogen Free  
MC34118-D28-T  
MC34118-E28-T  
MC34118-S28-T  
MC34118-S28-R  
MC34118G-D28-T  
MC34118G-E28-T  
MC34118G-S28-T  
MC34118G-S28-R  
DIP-28  
SDIP-28  
SOP-28  
SOP-28  
Tube  
Tube  
Tube  
Tape Reel  
www.unisonic.com.tw  
Copyright © 2009 Unisonic Technologies Co., Ltd  
1 of 12  
QW-R108-007,D  

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