TLP104(E)

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Optoisolators are used in a wide variety of applications where the isolation of digital signals is needed. The TLP104(E) optoisolator is part of a family of optoisolators from Toshiba featuring CMOS compatible input thresholds and TTL compatible outputs. This optoisolator is designed for use in logic output applications, and is typically used for applications such as reset indication and alarm, logic transition detection, and logic level translation.

The TLP104E is a 4 pin optoisolator package which includes an LED coupled to a logic output transistor. The LED is excited by the input signal at the LED input pin, and the output signal from the optoisolator is received at the output transistor pin. The LED input and output transistor are separated electrically in order to provide electrical isolation of the input signal from the output signal. The other two pins provide the necessary power and ground connections.

The LED is driven by a low voltage input signal, typically between 0V and 5V, depending on the specific model of the optoisolator that is used. When the LED is excited, the light energy causes minority carriers to be injected into the base of the output transistor. These injected carriers decrease the base-emitter voltage (Vbe) which drives the output transistor into conduction. The output signal from the optoisolator is received at the output transistor pin which switches between 0V and Vcc when the LED is illuminated.

The TLP104(E) optoisolator is designed for use in logic output applications. The output voltage level of the optoisolator is compatible with TTL logic levels, and the input voltage is CMOS compatible. This makes the TLP104(E) well suited for applications where logic level translation or logic transition detection is needed. The optoisolator is also suitable for reset indication and alarm circuits.

The TLP104(E) is a high frequency optoisolator, with typical response times of 10ns or less. This makes it suitable for applications requiring high speed data transfer with minimal potential for signal crossover. Additionally, it provides up to 3.5kV of electrical isolation between the input and output signals. This ensures that the logic levels are not affected by any external voltage or electrical noise, providing a reliable data transfer even under harsh conditions.

In conclusion, the TLP104(E) optoisolator is an ideal choice for logic output applications where isolation of the input signal from the output signal is required. Its TTL compatible output and CMOS compatible input voltage levels make it suitable for use in a wide range of applications, such as reset indication and alarm, logic transition detection, and logic level translation. Additionally, it provides the necessary isolation for high speed data transfer with minimal potential for signal crossover. And its high frequency response time make it an excellent choice for high speed applications.

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