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MC34118 datasheet，免提电话使用手册
资料介绍
MC34118手册免提电话使用手册，引脚说明等等资料
部分文件列表
| 文件名 | 大小 |
| MC341_datasheet.pdf | 298K |
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（完整内容请下载后查看）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
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Tape Reel
www.unisonic.com.tw
Copyright © 2009 Unisonic Technologies Co., Ltd
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