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4N28

Optocoupler, Phototransistor Output, with Base Connection

Courtesy/Thanks to: Vishay Semiconductors

Description: The 4N25 family is an industry standard single channel phototransistor coupler. This family includes the 4N25, 4N26, 4N27, 4N28. Each optocoupler consists of gallium arsenide infrared LED and a silicon NPN phototransistor.

FEATURES
• Isolation test voltage 5000 VRMS
• Interfaces with common logic families
• Input-output coupling capacitance < 0.5 pF
• Industry standard dual-in-line 6 pin package
• Compliant to RoHS directive 2002/95/EC and in accordance to WEEE 2002/96/EC

APPLICATIONS
• AC mains detection
• Reed relay driving
• Switch mode power supply feedback
• Telephone ring detection
• Logic ground isolation
• Logic coupling with high frequency noise rejection

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Files
4n25.pdf
   Datasheet for the 4N25, 4n26, 4n27, 4n28 Optocouplers.
4n28.jpg
   Picture of a 4N28 optocoupler DIL8 chip.
Manufacturers
Vishay Semiconductors
   Manufacturer of discrete semiconductors and passive components
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