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U4087B PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 U4087B
기능 Low Voltage Voice Switch Interface Circuit
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U4087B 데이터시트, 핀배열, 회로
U4087Bwww.DataSheet4U.com
Low Voltage Voice Switch Interface Circuit for Hands-free
Operation in Telephone
Description
The voice switch interface circuit U4087B is a linear
integrated circuit for improvement of handsfree
performance of U4090B system.
The U4087B provides an optimized interface to U4090B,
the necessary level detectors and switching control for a
properly operating speakerphone. The detection
sensitivity and timing are externally controllable.
Additionally, the U4087B provides a back- ground noise
monitor which makes the circuit insensitive to room
noise.
The Block diagram shows level detectors, back ground
noise monitor.
Due to low voltage operation it can be operated via power
supply management of U4090B requiring 1.0 mA typ.
Features
D Low voltage operation: 3.0 to 7.0 V
D Four point signal sensing
D Monitoring system for background noise level
D Case: SO 16
D Chip Disable for active/standby operation
Benefits
D Fast channel switching allows quasi duplex operation
D Low current consumption
Block Diagram
TLO2
16
15
TLI2
Logic
CPT
14
Noise
detector
VB VM CD GND
7 13 6 5
Bias
TLO1
2
Logic
1
TLI1
9
RLI2
Logic
– TS
=+
Logic
DIRE
+
+ DIRA
Charge
Discharge
C.T.
Generator
4
Logic
RLI1
8
RLO2
12 10 11
CT TLDR TLDT
3
RLO1
12610
Figure 1. Block diagram with external circuit
TELEFUNKEN Semiconductors
Rev. A1, 09-Sep-96
Preliminary Information
1 (8)




U4087B pdf, 반도체, 판매, 대치품
U4087B
Typical Value of External Components
C1
100 nF
R3
C2
4.7 nF
R4
C3 10 m F R5
C4
220 m F
R6
C5 47 m F R7
C6
470 m F
R8
C7
820 nF
R9
C8
100 m F
R10
C9
100 nF
R11
C10 150 nF R12
C11 68 nF
R13
C12 33 nF
C13 10 m F
R14
R15
C14 100 nF R16
C15 1 m F
R17
C16 47 m F
R18
C17 10 m F
R19
C18 10 m F
R20
C19 68 nF
R21
C20 68 nF
C21 1 m F
R22
R23
C22 100 nF R24
C23 6.8 nF R25
C24 10 nF
R26
C25 100 nF R27
L1
2.2 mH
R28
R1 27 kW R29
R2 20 kW R31
www.DataSheet4U.com
> 68 kW
10 W
1.5 kW
62 kW
680 kW
22 kW
330 W
3 kW
62 kW
30 kW
62 kW
120 kW
47 kW
1 kW
1.2 W
30 kW
6.8 kW
6.8 kW
15 kW
330 kW
220 kW
68 kW
2 kW
3.3 kW
18 kW
2 kW
56 kW
4 (8) TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 09-Sep-96

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U4087B 전자부품, 판매, 대치품
Dimensions in mm
Package: SO16
U4087Bwww.DataSheet4U.com
94 8875
TELEFUNKEN Semiconductors
Rev. A1, 09-Sep-96
Preliminary Information
7 (8)

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전력 반도체 판매 ( IGBT, TR 모듈, SCR, 다이오드 모듈 )

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부품번호상세설명 및 기능제조사
U4087B

Low Voltage Voice Switch Interface Circuit

TEMIC Semiconductors
TEMIC Semiconductors

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