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C3701, C3704, C3704K

Table of contents:
Info of C3701
Info of C3704
Info of C3704K

C3701, C3704, C3704K Selling Leads, Datasheet

MFG:NEC Package Cooled:SOP D/C:D/C

C3701, C3704, C3704K Datasheet download

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Part Number: C3701

MFG: NEC

Package Cooled: SOP

D/C: D/C

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C3704 General Description

Hamamatsu C3704 series UV TRON driving circuits are low current consuming, signal processing circuits for the UV TRON, well known as a high sensitivity ultraviolet detecting tube. The C3704 series can be operated as a UV sensor by connecting the UV TRON and applying DC low voltage, as they have both a highvoltage power supply and a signal processing circuit on the same printed circuit board.

Since background discharges of the UV TRON caused by natural excitation lights (such as a cosmic ray, scattered sunlight, etc.) can be cancelled in the signal processing circuit, the output signals from the C3704 series can be used without errors.

When the high sensitivity sensor "UV TRON R2868" (sold separately) is used, the flame from a cigarette lighter (flame length: 25mm) can be detected even from a distance of more than 5m.

C3704 Maximum Ratings

Dimensional outline ..................................................... Figure 1
Weight ........................................................................ Approx. 20g
Output signal .............................................................. Open collector Output (50 V, 100 mA Max.) 10 ms width pulse output (Note : 1)
UV TRON supply voltage ............................................. DC 350 V (Note : 2)
Quenching time .......................................................... Approx. 50 ms
Operating temperature .............................................. -10 to +50°C (with no condensation)
Suitable UV TRON ....................................................... Low voltage operation UV TRON (such as R2868)

C3704 Typical Application

Flame detectors for gas and oil lighters
Fire alarms
Combustion monitors for burners
Electric spark detector
UV photoelectric counter

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