The Kynix Components

Product Overview The AT28C256 is a high-performance electrically erasable and programmable readonly memory. Its 256K of memory is organized as 32,768 words by 8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers access times to 150 ns with power dissipation of just 440 mW. When the device is deselected, the CMOS standby current is less than 200 µA.   This blog will introduce AT28C256 systematically from its features, pinout to its specifications, applications, also including AT28C256 datasheet and so much more.   Catalog Product Overview Related Video Introduction AT28C256 Features AT28C256 Pinout AT28C256 Applications AT28C256 Block Diagram AT28C256 AC Read Waveforms AT28C256 Package AT28C256 Specification AT28C256 Manufacturer AT28C256 Datasheet Using Warnings AT28C256 FAQ   Related Video Introduction   Video: Reading an AT28C256 EEPROM   AT28C256 Video Description: Using an old Raspberry Pi, a breadboard and two 74HC595 shift registers to read out a parallel PDIP EEPROM.   The LEDs were added as a debugging aid. The blue LEDs show the address currently selected, while the red LEDs show the contents of the byte on this address.   AT28C256 Features Fast Read Access Time – 150 nsAutomatic Page Write Operation – Internal Address and Data Latches for 64 Bytes – Internal Control Timer Fast Write Cycle Times – Page Write Cycle Time: 3 ms or 10 ms Maximum – 1 to 64-byte Page Write Operation Low Power Dissipation – 50 mA Active Current – 200 µA CMOS Standby Current Hardware and Software Data ProtectionDATA Polling for End of Write DetectionHigh Reliability CMOS Technology – Endurance: 104 or 105 Cycles – Data Retention: 10 Years Single 5V ± 10% SupplyCMOS and TTL Compatible Inputs and OutputsJEDEC Approved Byte-wide PinoutFull Military and Industrial Temperature RangesGreen (Pb/Halide-free) Packaging Option   AT28C256 Pinout The following figure is the diagram of AT28C256 pinout.   AT28C256 Pinout   AT28C256 Applications The Microchip AT28C256 is a high-performance 256Kbit Parallel EEPROM available in both Industrial and Military temp ranges, offering access times to 150ns with power dissipation of 440mW.   AT28C256 Block Diagram The following figure shows the block diagram of AT28C256.   AT28C256 Block Diagram   AT28C256 AC Read Waveforms The following figure shows the AT28C256 AC read waveforms.   AT28C256 AC Read Waveforms   Notes: 1. CE may be delayed up to tACC - tCE after the address transition without impact on tACC. OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE or by tACC - tOE after an address change without impact on tACC. tDF is specified from OE or CE whichever occurs first (CL = 5 pF).This parameter is characterized and is not 100% tested.   AT28C256 Package The following diagram shows the AT28C256 package.   AT28C256 Package   AT28C256 Specification AttributeValueMemory Size256kbitInterface TypeParallelPackage TypePLCCMounting TypeSurface MountPin Count32Organisation32K x 8 bitMinimum Operating Supply Voltage4.5 VMaximum Operating Supply Voltage5.5 VProgramming Voltage5VDimensions14.1 x 11.51 x 2.79mmMinimum Operating Temperature-40 °CMaximum Operating Temperature+85 °CMaximum Random Access Time150nsData Retention10yr   AT28C256 Manufacturer Atmel Corporation is a global leader in designing, manufacturing and marketing advanced semiconductors including microcontroller (MCU), programmable logic, and nonvolatile memory. By combining these core technologies, Atmel meets the evolving and growing needs of today's electronic system design engineer through the production of general purpose and application specific system level integrated chips. Atmel's world class expertise and wealth of experience in system-level integration enable all of Atmel's products to be developed from their constituent blocks with minimum delay and risk.   AT28C256 Datasheet You can download AT28C256 datasheet from the link given below: AT28C256 Datasheet   Using Warnings Note: Please check their parameters and pin configuration before replacing them in your circuit.   AT28C256 FAQ What kind of power does the at28c256 memory have? The Microchip AT28C256 is a high-performance 256Kbit Parallel EEPROM available in both Industrial and Military temp ranges, offering access times to 150ns with power dissipation of 440mW. Deselected, CMOS standby current is less than 200μA.   How does an EEPROM work? The EEPROM uses the principle same as that of the UV-EPROM. In EPROM , cell is erased when electrons are removed from the floating gate, whereas in EEPROM , cell is erased when electrons are trapped in the floating cell. There are two distinct EEPROM families: serial and parallel access.   What is the difference between RAM and EEPROM? RAM is just memory for programs, data and files. A ram module is normally added to to the internal RAM of the machine. Perhaps a better way to say it is that an EPROM (Erasable Programmable Read-Only Memory) is a non-volatile storage device that does not require any type of standby power to maintain its contents.

Product Overview The Microchip USB251xB/xBi hub family is a group of low-power, configurable, MTT (multi transaction translator) hub controller ICs. The hub provides downstream ports for embedded USB solutions and is fully compliant with the USB 2.0 Specification. Each of the hub controllers can attach to an upstream port as a full-speed or full-/hi-speed hub. The hub can support low-speed, full-speed, and hi-speed downstream devices when operating as a hi-speed hub.   This blog will introduce USB2514B systematically from its features, pinout to its specifications, applications, also including USB2514B datasheet and so much more.   Catalog Product Overview USB2514B Features USB2514B Pinout USB2514B Applications USB2514B CAD Models USB2514B Block Diagram USB2514B Circuit Schematic USB2514B Package USB2514B Specification USB2514B Manufacturer USB2514B Datasheet Using Warnings USB2514B FAQ   USB2514B Features USB251xB/xBi products are fully footprint compatible with USB251x/xi/xA/xAi products asdirectdrop-in replacements — Cost savings include using the same PCB components and application of USB-IF Compliance by Similarity Full power management with individual or gangedpower control of each downstream portFully integrated USB termination and pull-up/pulldown resistorsSupports a single external 3.3 V supply source;internal regulators provide 1.2 V internal core voltageOnboard 24 MHz crystal driver or external24 MHz clock input   USB2514B Pinout The following figure is the diagram of USB2514B pinout.   USB2514B Pinout   USB2514B Applications LCD monitors and TVsMulti-function USB peripheralsPC motherboardsSet-top boxes, DVD players, DVR/PVRPrinters and scannersPC media drive bayPortable hub boxesMobile PC dockingEmbedded systems   USB2514B CAD Models The followings are USB2514B Symbol, Footprint, and 3D Model.   USB2514B Symbol   USB2514B Footprint   USB2514B 3D Model   USB2514B Block Diagram The following figure shows the block diagram of USB2514B.   USB2514B Block Diagram   USB2514B Circuit Schematic The following is the typical crystal circuit of USB2514B.   USB2514B Circuit Schematic   USB2514B Package The following diagram shows the USB2514B package.   USB2514B Package   USB2514B Specification Product AttributeAttribute ValueManufacturer:MicrochipProduct Category:USB Interface ICType:Hub ControllerMounting Style:SMD/SMTPackage / Case:SQFN-36Standard:USB 2.0Speed:High Speed (HS)Data Rate:480 Mb/sSupply Voltage - Min:3 VSupply Voltage - Max:3.6 VOperating Supply Current:70 mAMinimum Operating Temperature:- 40 CMaximum Operating Temperature:+ 85 CBrand:Microchip TechnologyInterface Type:I2CMoisture Sensitive:YesNumber of Ports:4 PortOperating Supply Voltage:3.3 VFactory Pack Quantity:490Subcategory:Interface ICsUnit Weight:0.007055 oz   USB2514B Manufacturer Microchip Technology Inc. is a leading provider of microcontroller, mixed-signal, analog and Flash-IP solutions, providing low-risk product development, lower total system cost and faster time to market for thousands of diverse customer applications worldwide. Headquartered in Chandler, Arizona, Microchip offers outstanding technical support along with dependable delivery and quality.   USB2514B Datasheet You can download USB2514B datasheet from the link given below: USB2514B Datasheet   Using Warnings Note: Please check their parameters and pin configuration before replacing them in your circuit.   USB2514B FAQ What is USB interface IC? A USB Interface ICs is an integrated circuit designed specifically for connecting a microprocessor (MPU) or microcontroller (MCU) system to a USB interface. USB interfaces are commonly used to provide data communications and control between computers and their peripherals.   What do USB drives do? A USB drive, also referred to as a flash drive or memory stick, is a small, portable device that plugs into the USB port on your computer. USB drives are commonly used for storage, data backup, and transferring files between devices.   What does USB stand for? The term USB stands for "Universal Serial Bus". USB cable assemblies are some of the most popular cable types available, used mostly to connect computers to peripheral devices such as cameras, camcorders, printers, scanners, and more.

Catalog Product Overview W5500 Related Video Introduction W5500 CAD Models W5500 Pin Assignment W5500 Block Diagram W5500 Crystal Reference Schematic W5500 Features W5500 Applications W5500 Datasheet W5500 Specifications W5500 Manufacturer Using Warning W5500 FAQ   Product Overview The W5500 chip is a Hardwired TCP/IP embedded Ethernet controller that provides easier Internet connection to embedded systems. W5500 enables users to have the Internet connectivity in their applications just by using the single chip in which TCP/IP stack, 10/100 Ethernet MAC and PHY embedded.   WIZnet‘s Hardwired TCP/IP is the market-proven technology that supports TCP, UDP, IPv4, ICMP, ARP, IGMP, and PPPoE protocols. W5500 embeds the 32Kbyte internal memory buffer for the Ethernet packet processing. If you use W5500, you can implement the Ethernet application just by adding the simple socket program. It’s faster and easier way rather than using any other Embedded Ethernet solution. Users can use 8 independent hardware sockets simultaneously.   SPI (Serial Peripheral Interface) is provided for easy integration with the external MCU. The W5500’s SPI supports 80 MHz speed and new efficient SPI protocol for the high speed network communication. In order to reduce power consumption of the system, W5500 provides WOL (Wake on LAN) and power down mode.   W5500 Related Video Introduction W5500 Video Description: In this video, I have discussed on how to interface W5500 Ethernet break out with arduino. Here I have used my smartphone as router where it helps PC get internet via wifi and PC is connected to W5500 Ethernet via a ethernet cable by which all the devices gets connected in a common network.    W5500 CAD Models   Figure: W5500 PCB Symbol       Figure: W5500 Footprint       Figure: W5500 3D Models   W5500 Pin Assignment Figure: W5500 Pin Assignment   W5500 Block Diagram Figure: W5500 Block Diagram   W5500 Crystal Reference Schematic Figure: W5500 Crystal Reference Schematic   W5500 Features - Supports Hardwired TCP/IP Protocols : TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE - Supports 8 independent sockets simultaneously - Supports Power down mode - Supports Wake on LAN over UDP - Supports High Speed Serial Peripheral Interface(SPI MODE 0, 3) - Internal 32Kbytes Memory for TX/RX Buffers - 10BaseT/100BaseTX Ethernet PHY embedded - Supports Auto Negotiation (Full and half duplex, 10 and 100-based ) - Not supports IP Fragmentation - 3.3V operation with 5V I/O signal tolerance - LED outputs (Full/Half duplex, Link, Speed, Active) - 48 Pin LQFP Lead-Free Package (7x7mm, 0.5mm pitch)   W5500 Applications - Home Network Devices: Set-Top Boxes, PVRs, Digital Media Adapters - Serial-to-Ethernet: Access Controls, LED displays, Wireless AP relays, etc. - Parallel-to-Ethernet: POS / Mini Printers, Copiers - USB-to-Ethernet: Storage Devices, Network Printers - GPIO-to-Ethernet: Home Network Sensors - Security Systems: DVRs, Network Cameras, Kiosks - Factory and Building Automations - Medical Monitoring Equipment - Embedded Servers   W5500 Datasheet You can download the datasheet from the link given below: W5500 Datasheet   W5500 Specifications Product AttributeAttribute ValueManufacturer:WIZnetProduct Category:Ethernet ICsMounting Style:SMD/SMTPackage / Case:LQFP-48Product:Ethernet ControllersStandard:10/100BASE-TXNumber of Transceivers:1 TransceiverData Rate:10 Mb/s, 100 Mb/sInterface Type:SPIOperating Supply Voltage:3.3 VOperating Temperature:-40°C ~ 85°CBrand:WIZnetMoisture Sensitive:YesProduct Type:Ethernet ICsSubcategory:Communication & Networking ICsSupply Current - Max:132 mASupply Voltage - Max:3.63 VSupply Voltage - Min:2.97 VUnit Weight:0.049384 oz   W5500 Manufacturer WIZnet is a private, fabless semiconductor company founded in Korea in 1998. Products include an Internet Processor, the iMCU™, which is specialized by TOE (TCP/IP Offload Engine) technology, based on a unique patented fully hardwired TCP/IP. The iMCU is aimed at Embedded Internet Devices in a wide variety of applications, segmented both locally and regionally.   Using Warning Note: Please check their parameters and pin configuration before replacing them in your circuit.   W5500 FAQ What is a W5500? The W5500 chip is a Hardwired TCP/IP embedded Ethernet controller that provides easier Internet connection to embedded systems. W5500 enables users to have the Internet connectivity in their applications just by using the single chip in which TCP/IP stack, 10/100 Ethernet MAC and PHY embedded.   What is the use of W5500? W5500 uses a 32Kbytes internal buffer as its data communication memory. By using W5500, users can implement the Ethernet application they need by using a simple socket program instead of handling a complex Ethernet Controller. It is possible to use 8 independent hardware sockets simultaneously.   What is an Ethernet controller? An Ethernet controller is an integrated circuit chip that controls Ethernet communications. The Internet cable, which plugs into your computer, transfers data to the Ethernet controller, which decodes the data and puts it into a form your computer can use.  

CatalogProduct Overview2N3055 Related Video Introduction2N3055 CAD Models2N3055 Internal Schematic Diagram2N3055 Features2N3055 Datasheet2N3055 Specifications2N3055 ManufacturerUsing Warning2N3055 FAQ Product OverviewThe 2N3055 is a silicon Epitaxial-Base Planar NPN transistor mounted in Jedec TO-3 metal case.It is intended for power switching circuits, series and shunt regulators, output stages and high fidelity amplifiers.The complementary PNP type is MJ2955. 2N3055 Related Video Introduction2N3055 Video Description: Hello guys, this is a class A amplifier circuit using transistors 2N3055 and C2073 paired  Darlington, the circuit for quite a high amplification factor gives extremely powerful sound.This is the simplest circuit, easy to find components.Thank you for watching the video and for supporting me. Good luck. 2N3055 CAD ModelsFigure: 2N3055 PCB Symbol   Figure: 2N3055 Footprint   Figure: 2N3055 3D Models 2N3055 Internal Schematic DiagramFigure: 2N3055 Internal Schematic Diagram 2N3055 Features■ STMicroelectronics preferred salestypes■ Complementary NPN-PNP devices 2N3055 DatasheetYou can download the datasheet from the link given below:2N3055 Datasheet 2N3055 SpecificationsTypeDescriptionCategoryDiscrete Semiconductor ProductsTransistors - Bipolar (BJT) - SingleMfrSTMicroelectronicsPackageTrayPart StatusObsoleteTransistor TypeNPNCurrent - Collector (Ic) (Max)15 AVoltage - Collector Emitter Breakdown (Max)60 VVce Saturation (Max) @ Ib, Ic3V @ 3.3A, 10ACurrent - Collector Cutoff (Max)700µADC Current Gain (hFE) (Min) @ Ic, Vce20 @ 4A, 4VPower - Max115 WOperating Temperature200°C (TJ)Mounting TypeChassis MountPackage / CaseTO-204AA, TO-3Supplier Device PackageTO-3Base Product Number2N30 2N3055 ManufacturerSTMicroelectronics is a French-Italian multinational electronics and semiconductors manufacturer headquartered in Plan-les-Ouates near Geneva, Switzerland. The company resulted from the merger of two government-owned semiconductor companies in 1987: "Thomson Semiconducteurs" of France and "SGS Microelettronica" of Italy. It is commonly called "ST", and it is Europe's largest semiconductor chip maker based on revenue. While STMicroelectronics corporate headquarters and the headquarters for EMEA region are based in the Canton of Geneva, the holding company, STMicroelectronics N.V. is incorporated in the Netherlands. Using WarningNote: Please check their parameters and pin configuration before replacing them in your circuit. 2N3055 FAQWhat is 2N3055 transistor?The 2N3055 transistor is a diamond-shaped electronic device designed to control the movement of energy in larger operating systems. Transistors absorb volts and transform them into watts of energy. This transistor operates at 50 amperes (A), 60 volts (V), and 115 watts (W). Is 2N3055 a BJT?From the above posting we learned the main specifications and datasheet of the versatile workhorse transistor 2N3055. This transistor is a universal power BJT that can be used in almost all higher power based applications where high current and efficient switching of current is expected. What is 2N3055 used for?The 2N3055 transistor is used as a series pass transistor within linear power supplies and also used in high power and medium-current circuits like DC to AC inverters, low-frequency power converters, audio power amplifiers. 

Product Overview The 74HC08 provides provides four independent 2-input AND gates with standard push-pull outputs. The device is designed for operation with a power supply range of 2.0V to 6.0V.   This blog will introduce 74HC08 systematically from its features, pinout to its specifications, applications, also including 74HC08 datasheet and so much more.   Catalog Product Overview Related Video Introduction 74HC08 Features 74HC08 Pinout 74HC08 Applications 74HC08 Logic Diagram 74HC08 Marking Diagram 74HC08 Circuit Diagram 74HC08 Package 74HC08 Specification 74HC08 Manufacturer 74HC08 Datasheet Using Warnings 74HC08 FAQ   Related Video Introduction   Video: 7408 74HC08 quad 2 input AND gate integrated circuit IC LED demonstration by electronzap   74HC08 Video Description: 7408 is a quad 2 input AND gate integrated circuit (IC). I use one of the AND gates to demonstrate lighting an LED based on whether the 2 inputs are both high or not.  I show how pull up/pull down resistors work, and using the output to either source or sink current for an LED with protective resistor.   74HC08 Features  Output Drive Capability: 10 LSTTL Loads Outputs Directly Interface to CMOS, NMOS and TTLOperating Voltage Range: 2.0 to 6.0 VLow Input Current: 1.0 AHigh Noise Immunity Characteristic of CMOS DevicesIn Compliance With the JEDEC Standard No. 7A RequirementsESD Performance: HBM  2000 V; Machine Model  200 VChip Complexity: 24 FETs or 6 Equivalent GatesThese are Pb−Free Devices   74HC08 Pinout The following figure is the diagram of 74HC08 pinout.   74HC08 Pinout   74HC08 Applications General Purpose LogicWide array of products such as:  PCs, Networking, Notebooks, Netbooks  Computer Peripherals, Hard Drives, CD/DVD ROM  TV, DVD, DVR, Set Top Box   74HC08 Logic Diagram The following figure shows the Logic diagram of 74HC08.   74HC08 Logic Diagram   74HC08 Marking Diagram The following figure shows the Marking diagram of 74HC08.   74HC08 Marking Diagram   74HC08 Circuit Diagram The following is the circuit diagram of 74HC08.   74HC08 Circuit Diagram   74HC08 Package The following diagram shows the 74HC08 package.   74HC08 Package   74HC08 Specification Logic Function: AND GateNo. of Elements: QuadNo. of Inputs: 2No. of Pins: 14PinsLogic Case Style:  SOICProduct Range: 74HC08Supply Voltage Min: 2VSupply Voltage Max: 6VSchmitt Trigger Input: Without Schmitt Trigger InputOutput Current: 5.2mAOperating Temperature Min: -40°COperating Temperature Max: 125°C   74HC08 Manufacturer NXP Semiconductors N.V. is a Dutch global semiconductor manufacturer headquartered in Eindhoven, Netherlands. The company employs approximately 31,000 people in more than 35 countries, including 11,200 engineers in 33 countries. NXP reported revenue of $6.1 billion in 2015, including one month of revenue contribution from recently merged Freescale Semiconductor.   74HC08 Datasheet You can download 74HC08 datasheet from the link given below: 74HC08 Datasheet   Using Warnings Note: Please check their parameters and pin configuration before replacing them in your circuit.   74HC08 FAQ What is 74HC08? 74HCT08 is a quad 2-input AND gate. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.   What is a quad AND gate? A quad gate is an IC (integrated circuit or chip) containing four logic gates. The gates can be of any type: AND, OR, XOR, NOT, NAND, NOR, and XNOR. Within any given quad gate, all four of the individual gates are normally of the same type. A logic gate is an elementary building block of a digital circuit.   What does a AND gate do? The AND gate is a basic digital logic gate that implements logical conjunction (∧) from mathematical logic – it behaves according to the truth table above. A HIGH output (1) results only if all the inputs to the AND gate are HIGH (1). If none or not all inputs to the AND gate are HIGH, LOW output results.   What is the IC number of AND gate? An AND gate is a fundamental digital logic gate. It gives the output by multiplying both inputs. The IC number of AND Gate is 7408.   How many gates are available in a quad dual input AND gate chip? A quad gate is an IC (integrated circuit or chip) containing four logic gates. The gates can be of any type: AND, OR, XOR, NOT, NAND, NOR, and XNOR. Within any given quad gate, all four of the individual gates are normally of the same type. A logic gate is an elementary building block of a digital circuit.

CatalogCAD ModelsRelated Video InstructionPackage DimensionsTaping DimensionsFeaturesApplicationsDatasheetSpecificationsManufacturerUsing WarningFAQCAD Models Figure: PCB Symbol  Figure: Footprint  Figure: 3D Model Related Video InstructionMOC3021S Video Description: Optocoupler. In this video we learn how optocouplers work and also look at some simple electron circuits you can make yourself to understand how an optocoupler, opto-isolator, phototransistor, photocoupler works. Package Dimensions Figure: Package Dimensions Taping Dimensions Figure: Taping Dimensions Features 6 Pin DIP photocoupler, Triac driver output High input-output isolation voltage          Viso = 5,000VrmsHigh repetitive peak off-state voltage         VDRM: Min. 400 V.High critical rate of rise of off-state voltage         dV/dt: Min.1000V / µsDual-in-line package :         MOC3020, MOC3021, MOC3022, MOC3023Wide lead spacing package :         MOC3020M, MOC3021M, MOC3022M, MOC3023MSurface mounting package :         MOC3020S, MOC3021S, MOC3022S, MOC3023STape and reel packaging :         MOC3020S-TA, MOC3021S-TA, MOC3022S-TA, MOC3023S-TA         MOC3020S-TA1, MOC3021S-TA1, MOC3022S-TA1, MOC3023S-TA1Safety approval         * UL approved (No. E113898)         * TUV approved (No. R9653630)         * CSA approved (No. CA91533-1)         * VDE approved ( No. 40015248)         * CQC approved (No.CQC11001061921-2)RoHS Compliance         All materials be used in device are followed EU RoHS directive (No.2002/95/EC).ESD pass HBM 8000V/MM2000VMSL class1 ApplicationsMotor Controls.Solid state relaysFor triggering high power thyristor and triacHousehold use equipment DatasheetYou can download the datasheet from the link given below:MOC3021S-Datasheet SpecificationsManufacturer:Lite-OnProduct Category:Triac & SCR Output OptocouplersPackage / Case:SMD-6 Gull WingZero-Crossing Circuit:Without Zero-Crossing CircuitOutput Type:PhotoTriacNumber of Channels:1 ChannelIsolation Voltage:5000 VrmsIf - Forward Current:50 mAVf - Forward Voltage:1.15 VPd - Power Dissipation:330 mWOff-state Output Voltage - VDRM:400 VMinimum Operating Temperature:- 40 ℃Maximum Operating Temperature:+ 100 ℃Packaging:TubeBrand:Lite-OnHeight:3.5 mmLength:7.3 mmMaximum Trigger Current:8 mAMaximum Turn-On Time:20 usMounting Style:SMD/SMTProduct Type:Triac & SCR Output OptocouplersFactory Pack Quantity:65Subcategory:OptocouplersWidth:6.5 mmUnit Weight:0.064603 oz ManufacturerLite-On (also known as LiteOn and LiteON) is a Taiwanese Company that primarily manufactures consumer electronics, including LEDs, semiconductors, computer chassis, monitors, motherboards, optical disc drives, and other electronic components. The Lite-On group also consists of some non-electronic companies like a finance arm and a cultural company. Using WarningNote: Please check their parameters and pin configuration before replacing them in your circuit. FAQWhat is the output of optocoupler?An optocoupler (also called optoisolator) is a semiconductor device that allows an electrical signal to be transmitted between two isolated circuits. Two parts are used in an optocoupler: an LED that emits infrared light and a photosensitive device that detects light from the LED. What is an optocoupler used for?Optocouplers can either be used on their own as a switching device, or used with other electronic devices to provide isolation between low and high voltage circuits. You'll typically find these devices being used for: Microprocessor input/output switching. DC and AC power control. What are the features of optocoupler?Similar to discrete semiconductor device characteristics, optocoupler characteristics are set of curves that relate the voltage and current flowing through it. In an optocoupler we see two discrete devices, namely the diode at the input side and a photo transistor at the output side.