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U4082B-G PDF预览

U4082B-G

更新时间: 2024-11-28 13:15:07
品牌 Logo 应用领域
爱特美尔 - ATMEL 电信集成电路光电二极管
页数 文件大小 规格书
30页 541K
描述
Speaker Phone Circuit, PDSO28, LEAD FREE, SO-28

U4082B-G 技术参数

是否无铅:不含铅是否Rohs认证:符合
生命周期:Obsolete零件包装代码:SOIC
包装说明:SOP,针数:28
Reach Compliance Code:compliantHTS代码:8542.39.00.01
风险等级:5.63Is Samacsys:N
JESD-30 代码:R-PDSO-G28JESD-609代码:e4
长度:17.925 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封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):260
认证状态:Not Qualified标称供电电压:5 V
表面贴装:YES电信集成电路类型:SPEAKER PHONE CIRCUIT
温度等级:COMMERCIAL端子面层:NICKEL PALLADIUM GOLD
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL处于峰值回流温度下的最长时间:40
宽度:7.4 mmBase Number Matches:1

U4082B-G 数据手册

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Features  
Low-voltage Operation 3V to 6.5V  
Attenuator Gain Range Between Transmit and Receive: 52 dB  
Four-point Signal Sensing for Improved Sensitivity  
Monitoring System for Background Noise Level  
Adjustable Microphone Amplifier Gain  
Mute Function  
Chip Disable for Active/Standby Operation  
On-board Filter  
Low-voltage  
Voice-switched  
IC for  
Hands-free  
Operation  
Dial Tone Detector  
Compatible with U4083B Speaker Amplifier  
Benefits  
Fast Channel Switching Allows Quasi-duplex Operation  
Proper Operation in Noisy Surroundings  
1. Description  
The low-voltage voice-switched speakerphone circuit, U4082B, incorporates a wide  
range of functions. The versatility of the device is further enhanced by giving access to  
internal circuit points. The block diagram (see Figure 1-1) shows amplifiers, level  
detectors, transmit and receive attenuators operating in complementary functions,  
background noise monitors, chip disable, dial tone detector and mute function. Due to  
low-voltage operation, the device can be operated either by a low supply or via a tele-  
phone line requiring 5.5 mA typically. Stand-alone operation is enabled by a coupling  
transformer (Tip and Ring) or in conjunction with a handset speech network, as shown  
in Figure 1-2 on page 2.  
U4082B  
Figure 1-1. Block Diagram  
MIC  
11 MICO 10 17 TLI2  
9
8
7
HTI  
6
HTO-  
TI  
TO  
-
-
+
T Attenuator  
VS  
-
5
+
HTO+  
+
VB  
VB  
12  
MUTE  
VB  
27  
CPR  
AGC  
Background  
Noise Monitor  
Background  
Noise Monitor  
16  
CPT  
23  
TLI1  
Level  
Detectors  
Level  
Detectors  
18  
TLO2  
Attenuator  
Control  
25  
RLO1  
19  
24  
TLO1  
RLO2  
Dial Tone  
Detector  
4
+
-
VS  
U4082B  
28  
VB  
GND  
Filter  
+1  
400Ω  
2
FI  
3
CD  
R Attenuator  
20  
RLI2  
15  
14  
22 21  
13  
26  
RLI1  
1 PD  
VB  
CT  
RECO  
VCI  
RI  
Rev. 4743D–CORD–03/06  

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