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Optocoupler ICs

Optocoupler ICs are semiconductor devices designed to couple isolated input and output circuits using light. They protect the signal receiving system by preventing high voltages. The Optocoupler features two integrated devices: a light sensor and a light emitter that functions as a simple switch. Furthermore, optocouplers generally come in semiconductor packages like PDIP or SOIC. 

Alternative names for Optocouplers

Optocouplers are also known as optical couplers, optoisolators, or photocouplers.

How Do Optoisolator ICs Work?

Optocouplers are comprised of light emitters and light sensors that transfer energy from one circuit to another. The light emitter produces visible, infrared, or laser light. This emitter converts light input into a light signal detected by a light detector and converted back to an electrical signal. Optocouplers block high voltages and voltage variations and ensure the circuit and other parts are protected from propagation in the event of spikes. Thus, they are used in voltage variation applications.  

Factors Necessary for the Selection of Optocouplers

Various factors determining a precise optocoupler include supply voltage, output current, switching speed, common mode noise rejection (CMR), and threshold input current IFHL/IFHL.

What is the Advantage of Using an Optocoupler?

An optocoupler's primary and significant benefit is that they are easy to bring to the circuits and perform the voltage isolation between the input circuits and output circuit blocks. 

Types of Optocoupler ICs

Optocouplers from our Displays and Optoelectronics family have various types available on the electronics market:

  • Photodiode
  • Resistive
  • Phototransistor
  • Bidirectional

Output Types of Optocoupler ICs

  • MOSFET
  • TRIAC
  • CMOS
  • Darlington
  • Photodarlington
  • IGBT Gate Drive
  • Phototransistor
  • Single Transistor
  • Logic Gate

Applications of Optocoupler ICs

The major function of these devices is electrical protection and they are used as either switching devices or as isolation between high and low voltage circuits. Equipment from the Display and Optoelectronics family are primarily found in devices like: 

Furthermore, they are also employed in:

  • Removal of electrical noise from signals
  • Use small digital signals for controlling larger AC voltages.

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Vishay
Rohs Verified
SFH601-3, Vishay
298 In Stock
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£ 0.46
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£ 0.42
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£ 0.32
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VOM618A-4X001T, Vishay
2998 In Stock
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£ 0.12
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CNY64ST, Vishay
398 In Stock
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£ 0.84
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VOL617A-4T, Vishay
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£ 0.12
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VOL628A-2X001T, Vishay
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£ 0.19
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TCLT1103, Vishay
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£ 0.16
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TLP7920(A,F(O, Toshiba
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CNY65AGRST, Vishay
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£ 0.94
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£ 0.86
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LH1502BAC, Vishay
1848 In Stock
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£ 2.49
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K815P, Vishay
3598 In Stock
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SFH690AT, Vishay
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£ 0.18
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VO207AT, Vishay
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VOL617A-2T, Vishay
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CNY17-3X007, Vishay
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VO2601-X017T, Vishay
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SFH6206-2, Vishay
1798 In Stock
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VO14642AT, Vishay
998 In Stock
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PS9513-V-AX, Renesas Electronics
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PS9587-AX, Renesas Electronics
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TCLT1008, Vishay
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VO617A-3X017T, Vishay
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TCMT1102, Vishay
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LH1500AABTR, Vishay
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PS9924-Y-AX, Renesas Electronics
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4N35SVM, ON Semiconductor

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SFH601-3, Vishay

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Optocoupler, Transistor Output, SFH Series, Vishay Semiconductor VO617A and VO618A series provides up to 5300 Vrms of voltage Isolation. VO615A, VOL617A and VOL628A series provides up to 5000 Vrms of voltage Isolation. VOM617A and VOM618A series provides up to 3750 Vrms of voltage Isolation. VO617A, VO618A, VOL617A, VOL628A, VOM617A, and VOM618A Applications include Isolation in AC adapters, switch mode power supplies, programmable logic controllers, Industrial controls, telecom systems, smart meters, office equipment, power on Internet and solar. Optocouplers VO615A, VO617A, VO618A, VOL617A, VOL628A, VOM617A, and VOM618A have an operating temperature up to 110 degrees. Optocouplers, Vishay Semiconductor
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VOM618A-4X001T, Vishay

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Optocoupler, Transistor Output, VOM Series, Vishay Semiconductor Vishay low input current optocoupler with a phototransistor output VOM617A and VOM618A series protect equipment users from electrical shocks and protect the microprocessors within these systems from being damaged by voltage spikes. VOM617A and VOM618A series provides up to 3750Vrms of voltage Isolation Applications include Isolation in AC adapters, switch mode power supplies, programmable logic controllers, Industrial controls, telecom systems, smart meters, office equipment, power on Internet and solar Optocouplers VOM617A and VOM618A have an operating temperature up to 110 degrees Celsius. Optocouplers, Vishay Semiconductor
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4N35SM, Isocom

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Optocoupler, Transistor Output, Isocom Components The 4N35, 4N36, 4N37 are optically coupled isolators consisting of a Gallium Arsenide infrared emitting diode and an NPN silicon phototransistor mounted in a standard 6-pin dual-in-line package. Surface Mount Option Available. All electrical parameters are 100% tested by manufacturing. Specifications are guaranteed to a cumulative 0.65% AQL. 3500, 2500 or 1500 Volt Isolation High DC Current Transfer Ratio (100% min) Low Cost Dual-In-Line Package. Optocouplers, Isocom Components
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MOC3083X, Isocom

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The MOC3080/81/82/83 is an optically coupled isolator. It consists of a Gallium Arsenide infrared emitting diode coupled with a monolithic silicon detector performing the functions of a zero crossing bilateral triac mounted in a standard 6 pin dual-in-line package Photo-Triac Output 5300V Isolation 800V Peak Blocking Voltage Low cost dual-in-line package Zero Voltage Crossing
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