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MC34118-S28-R PDF预览

MC34118-S28-R

更新时间: 2024-02-05 14:34:16
品牌 Logo 应用领域
友顺 - UTC 电信集成电路电信电路电话电路光电二极管
页数 文件大小 规格书
12页 297K
描述
VOICE SWITCHED SPEAKER-PHONE CIRCUIT

MC34118-S28-R 技术参数

是否Rohs认证: 不符合生命周期:Active
零件包装代码:SOIC包装说明:SOP-28
针数:28Reach Compliance Code:compliant
HTS代码:8542.39.00.01风险等级:5.65
Is Samacsys:NJESD-30 代码:R-PDSO-G28
JESD-609代码:e0长度:17.7 mm
功能数量:1端子数量:28
最高工作温度:60 °C最低工作温度:-20 °C
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP28,.4封装形状:RECTANGULAR
封装形式:SMALL OUTLINE电源:3.5/6.5 V
认证状态:Not Qualified座面最大高度:2.8 mm
子类别:Telephone Circuits最大压摆率:0.008 mA
标称供电电压:5 V表面贴装:YES
技术:BIPOLAR电信集成电路类型:SPEAKER PHONE CIRCUIT
温度等级:OTHER端子面层:TIN LEAD
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL宽度:7.65 mm
Base Number Matches:1

MC34118-S28-R 数据手册

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MC34118  
LINEAR INTEGRATED CIRCUIT  
„
PIN DESCRIPTION  
PIN NO  
PIN NAME  
DESCRIPTION  
1
2
FO  
FI  
Output of filter. The output impedance is less than 50.  
Input of filter. The input impedance is less than 1M.  
Chip Disable input .A logic low (voltage lower than 0.8V) sets normal operation. A logic  
high (voltage higher than 2V) disable the IC. This pin’s input impedance is 90 KΩ  
nominally.  
3
4
CD  
This pin requires a supply voltage of +2.8V ~ +6.5V at 5mA. After VCC falls from 3.5V ~  
2.8V, when in the receive mode, an AGC circuit reduces the receive attenuator gain by  
25dB.  
VCC  
5
6
HTO+  
HTO-  
The output of the second hybrid amplifier. This amplifier’s gain is internally set at -1.  
Output of the first hybrid amplifier. This amplifier’s gain of the amplifier is set by  
external resistors.  
7
8
HTI  
The first hybrid amplifier’s input and summing node. DC level is about equal to VB.  
The transmit attenuator’s output. DC level is about VB.  
TXO  
The transmit attenuator’s input. It’s maximum signal level is 350 mVrms. The input  
impedance is 10K.  
9
TXI  
10  
11  
MCO  
MCI  
The microphone amplifier’s output. This amplifier’s gain is set by external resistors.  
The summing node of the microphone’s input. DC lever is VB.  
Input of mute. A logic low (voltage lower than 0.8V) sets the circuit normal operation. A  
logic high (voltage higher than 2V) mutes the microphone amplifier, but it doesn’t affect  
the rest of the circuit. The input impedance is 90 K ohms.  
12  
13  
MUT  
VLC  
The input of Volume control. In the receive mode, when VLC=VB, the receive  
attenuator is at maximum gain. The receive gain is down 35dB when VLC=0.3dB, and  
it does not effect the transmit modes.  
14  
15  
CT  
VB  
At this pin, to switch modes, the RC sets the response time for the circuit.  
In this pin, there’s an output voltage=Vcc/2 which is a system AC ground and biases  
the volume control. What required is a filter capacitor.  
16  
17  
CPT  
TLI2  
The time constant for the transmit background side can be set by the RC at this pin .  
The input to the transmit level detector which is on the microphone/ speaker side.  
The output to the transmit level detector which is on the microphone/ speaker side.  
Also the input to the transmit background monitor.  
18  
TLO2  
19  
20  
RLO2  
RLI2  
The Output of the receive level detector which is on the microphone/ speaker side  
The input to the receive level detector which is on the microphone/ speaker side  
The input to the receive attenuator and dial tone detector. In this pin, the maximum  
input level is 350mVrms,and the input impedance is 10K.  
21  
RXI  
22  
23  
RXO  
TLI1  
The output of the receive attenuator. This pin’s DC level is VB.  
The input to the transmit level detector which is on the line side.  
The output to the transmit level detector which is on the line side, and also the input to  
the transmit background monitor.  
24  
TLO1  
25  
26  
27  
28  
RLO1  
RLI1  
CPR  
GND  
The output of the receive level detector which is on the line side.  
The input to the receive level detector which is on the line side.  
The time constant for the receive background monitor can be set by the RC at this pin.  
Ground.  
UNISONIC TECHNOLOGIES CO., LTD  
2 of 12  
www.unisonic.com.tw  
QW-R108-007,D  

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