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PDF NJU7181 Data sheet ( Hoja de datos )
| Número de pieza | NJU7181 | |
| Descripción | SIGNAL LEVEL SENSOR SYSTEM | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJU7181www.DataSheet4U.com
SIGNAL LEVEL SENSOR SYSTEM
GENERAL DESCRIPTION
The NJU7181 is a signal level sensor system IC. It sends
a High flag to the microprocessor or other equipments
whenever it detects the existence of the audio signal.
The NJU7181 includes a delay circuit which allows the
IC continue to hold the flag after the absence of the audio
signal. This holding time can be adjusted with external
capacitor.
Together with its adjustable Input Sensitivity (by external
resistor) & its characteristic of low current consumption and
low operating voltage, NJU7181 is suitable for Eco-Design of
Energy-using Products and for battery operated applications.
PACKAGE OUTLINE
TVSP8
FEATURES
• Operating Voltage
0.9 to 5.5V
• Low Operating Current
55µA typ.
• Delay circuit for long Recovery time
• Adjustable Recovery time by external capacitor
• Adjustable Input Sensitivity by external resistance
• C-MOS Technology
• Package Outline
TVSP8, ESON8
APPLICATIONS
• Power Saving for battery operated devices
• Muting Application
• Memory saving for recording devices
• Half- duplex transmission application
BLOCK DIAGRAM
External Trigger
V+
ON
OFF
V+
ESON8 (PLAN)
Level
Detector
Delay
D
L
CLR
Latch
OUT
IN
Version 5.1E
–1–
1 page  
APPLICATION CIRCUIT
NJU7181www.DataSheet4U.com
Audio Signal Input
External Trigger
Main Path
V+
ON
OFF
Audio Signal Output
V+
Level
Detector
Delay
D
L
CLR
Latch
Ci R1
R2
CD RD=220kΩ
DC Output
High or Low
DC voltage inform ation
(to Micro Processor, etc)
Input sensitivity
(Detection level)
Audio Signal Input
DC Output (NJU7181)
Low
Delay Time
(Adjustable from a few second to a few minutes by CD)
High Low
Version 5.1E
–5–
5 Page 
TERMINAL DESCRIPTION
Terminal SYMBOL
FUNCTION
NJU7181www.DataSheet4U.com
EQUIVALENT CIRCUIT
VOLTAGE
6
RES_D
Delay Time
Resistor
3uA x RD
7 OUT DC Output
0 or V+
8 V+ Supply Voltage
V+
Version 5.1E
– 11 –
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet NJU7181.PDF ] | |
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