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参数资料
| 型号： | MC34118DW |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 1/22页 |
| 文件大小： | 0K |
| 描述： | IC VOICE SWITCH SPKPHONE 28-SOIC |
| 标准包装： | 26 |
| 功能： | 语音切换式扬声电话 |
| 电路数： | 1 |
| 电源电压： | 3.5 V ~ 6.5 V |
| 电流 - 电源： | 5.5mA |
| 工作温度： | -20°C ~ 60°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC W |
| 包装： | 管件 |
| 包括： | 背景噪声监视器，芯片禁用，拨号音调检测器，驱动器放大器，电平检测器，麦克风放大器，静音 |
MC34118
MOTOROLA
1
Voice Switched
Speakerphone Circuit
Silicon Monolithic Integrated Circuit
The MC34118 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 adjustable gain and MUTE control, Transmit and
Receive attenuators which 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. A Dial Tone Detector prevents the dial
tone from being attenuated by the Receive background noise monitor circuit.
Also included are 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 to filter out 60 Hz noise in the receive channel, or for other filtering
functions. A Chip Disable pin permits powering down the entire circuit to
conserve power on long loops where loop current is at a minimum.
The MC34118 may be operated from a power supply, or it can be powered
from the telephone line, requiring typically 5.0 mA. The MC34118 can be
interfaced directly to Tip and Ring (through a coupling transformer) for
stand--alone operation, or it can be used in conjunction with a handset speech
network and/or other features of a featurephone.
Improved Attenuator Gain Range: 52 dB Between Transmit and Receive
Low Voltage Operation for Line--Powered Applications (3.0 -- 6.5 V)
4--Point Signal Sensing for Improved Sensitivity
Background Noise Monitors for Both Transmit and Receive Paths
Microphone Amplifier Gain Set by External Resistors — Mute Function
Included
Chip Disable for Active/Standby Operation
On Board Filter Pinned--Out for User Defined Function
Dial Tone Detector to Inhibit Receive Idle Mode During Dial Tone Presence
Standard 28--Pin Plastic DIP Package and SOIC Package Available
Compatible with MC34119 Speaker Amplifier
Motorola now offers Pb--free packages with suffix code EG
SIMPLIFIED BLOCK DIAGRAM
BIAS
FILTER
VCC
CHIP
DISABLE
TIP
RING
BACKGROUND
NOISE MONITOR
DIAL TONE
DETECTOR
SPEAKER
MIKE
VOLUME
CONTROL
MUTE
POWER AMP
(EXTERNAL)
Tx
ATTENUATOR
CONTROL
LEVEL
DETECTORS
LEVEL
DETECTORS
Rx
ATTENUATOR
BACKGROUND
NOISE MONITOR
AGC
ZB
--1.0
Order this document
by MC34118/D
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
MC34118
P SUFFIX
PLASTIC PACKAGE
CASE 710
28--PDIP
28
1
EG (Pb--free)
SUFFIX
DW SUFFIX
PLASTIC PACKAGE
CASE 751F
28--SOICW
28
1
PIN CONNECTIONS
(Top View)
(Pin assignments same for both packages)
5
4
3
2
1
10
9
8
7
6
11
12
13
14
20
21
22
23
24
25
26
19
27
28
18
17
16
15
HTI
VCC
CD
FI
FO
MCI
TXO
HTO+
CT
VLC
MUT
HTO--
TXI
MCO
TLO1
RLO1
RLI1
CPR
GND
CPT
TLI2
TLO2
VB
RLI2
RXO
TLI1
RLO2
RXI
Device
Operating
Temperature
Range
Package
ORDERING INFORMATION
MC34118DW/EG/R2 TA =--20° to +60°C 28 SOICW
MC34118P
28 PDIP
Motorola, Inc. 2003
REV 1
10/03
ARCHIVED - 6/2010
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC34118-E28-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:VOICE SWITCHED SPEAKER-PHONE CIRCUIT |
| MC34118EG | 制造商:Rochester Electronics LLC 功能描述: |
| MC34118G-D28-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:VOICE SWITCHED SPEAKER-PHONE CIRCUIT |
| MC34118G-E28-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:VOICE SWITCHED SPEAKER-PHONE CIRCUIT |
| MC34118G-S28-R | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:VOICE SWITCHED SPEAKER-PHONE CIRCUIT |
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