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TOCP200K Datasheet(PDF) 2 Page - Toshiba Semiconductor |
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TOCP200K Datasheet(HTML) 2 Page - Toshiba Semiconductor |
2 / 20 page 2 Note: TOSLINK is a trademark of Toshiba Corp. Raytela is a trademark of Toray Industries Inc. Eska Premier is a trademark of Mitubishi Rayon Co. Ltd. Sumiguide is a trademark of Sumitomo Electronic Industries Ltd. TOSLINKTM is a data transmission device which uses optical signals instead of electrical signals. Its principal features are as follows: Electromagnetic noise has no effect on the transmission line. The transmission line does not radiate any electromagnetic noise. The device is as easy to handle as like a digital IC, and connector assembly is easy. Comparison of TOSLINK and photocoupler TOSLINKTM Optical Transmission Device The function ability of TOSLINK is similar to that of a photocoupler. A photocoupler has light-emitting and light-receiving devices in one package. It is used to transmit electrical signals in a circuit, for a very short distane. TOSLINK can be imagined as follows: separate the emitting device from the receiving device in the center of a photocoupler, then re-connect the two devices using a long optical fiber cable. Because optical fiber is used as the transmission line, it is possible to transmit signals over long distances while isolating them using TOSLINK. As a result, TOSLINK is also sometimes referred to as a long-distance photocoupler. Comparison of TOSLINK and photocoupler Electrical and optical transmission system Electrical data transmission systems consist of the following devices: a line driver and line receiver to amplify electrical signals, a twisted-pair (or coaxial) cable as the transmission line and electrical connectors linking the line driver and line receiver to the electrical cable. By contrast, TOSLINK consist of the following devices: a transmitting module which converts electrical signals into optical ones, a receiving module which reconverts optical signals into electrical ones, optical fiber cable as the transmission line and optical connectors to link the transmitting and receiving modules to the optical fiber cable. In TOSLINK, a transmitting IC (LED driver) and LED are included in the transmitting module, and a receiving IC (waveform-reshaping circuit) and photodiode are included in the receiving module. The interface between transmitting and receiving ICs is at the transistor-transistor logic (TTL) or emitter coupled logic (ECL) levels. Because of this it is easy to make connections with the other circuits. Data transmission system (a) Data transmission by electrical wire Electrical input signal Line Driver Twisted pair or coaxial cable Electrical connector Electrical output signal Line Receiver Electrical connector (b) Data transmission using fiber-optic cables Electrical input signal Transmitting Module Transmitting Circuit Optical fiber E/O converter LED Receiving Circuit Photodiode O/E converter Fiber-optic link Fiber-optic connector Electrical output signal Receiving Module Fiber-optic connector VCC VCC Output Input (a)Photocoupler VCC VCC Output Input (b)TOSLINK Optical fiber Optical transmitting module Optical receiving module |
Similar Part No. - TOCP200K |
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Similar Description - TOCP200K |
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