ACPL-K74T-500E

Data Rate:	--
Supplier Device Package:	8-SO Stretched
Package / Case:	8-SOIC (0.268", 6.81mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Voltage - Supply:	3 V ~ 5.5 V
Current - DC Forward (If) (Max):	20mA
Voltage - Forward (Vf) (Typ):	1.5V
Rise / Fall Time (Typ):	10ns, 10ns
Propagation Delay tpLH / tpHL (Max):	35ns, 35ns
Series:	--
Output Type:	Push-Pull, Totem Pole
Input Type:	DC
Common Mode Transient Immunity (Min):	15kV/µs
Voltage - Isolation:	5000Vrms
Inputs - Side 1/Side 2:	2/0
Number of Channels:	2
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction
Optoisolators are optoelectronic devices used to isolate two circuits electrically. ACPL-K74T-500E is an optocoupler of a specific kind of optoisolator, the logic output type. They are used to transfer digital signals between two electrically isolated circuits in a secure manner to prevent high voltage or surge transmission and incorrect logic level output during operation.

Application Fields
Optoisolators are widely used in a variety of applications. In industrial automation, for example, they are used to prevent accidental leakage of currents from one circuit to another, malfunctions due to transient signals, and incorrect signals. In high-voltage power transmission circuits, they can prevent the danger of high voltage and ensure the correct operation of the system. ACPL-K74T-500E is a logic output type optoisolator which is mainly used in logic circuits where logic levels must be accurately transmitted. Specifically, it can be used in timing and pulse-width-modulation circuits, level converters, and logic circuits.
Features
ACPL-K74T-500E has several outstanding features. It is a low-cost product with high noise immunity, high-speed operation, and low saturation voltage. It has an internal photo-transistor to effectively isolate the output from the input. It has 1.2kV galvanic isolation voltage which can effectively prevent electric shock due to transient voltage in the power circuit. It has a minimum withstand voltage of 500V, and its maximum output current is 50mA.
Working Principle
ACPL-K74T-500E is a logic-output optoisolator whose working principle is based on the principle of light transmission. A diode is used to emit light when the input circuit is powered, and a phototransistor is used to receive the light and produce an output in the output circuit. This light emission creates a voltage difference between the two circuits, totally isolating the input cable from the output cable. The low saturation voltage of this optoisolator can ensure that the accurate logic level is processed in the output circuit.
Conclusion
ACPL-K74T-500E is a logic output type optoisolator, with features such as low cost, high speed of operation, and high noise immunity. It is mainly used in logic circuits, such as timing and pulse-width-modulation circuits, level converters, and logic circuits. It has an internal photo-transistor to effectively isolate the output from the input and has a 1.2kV galvanic isolation voltage. Its working principle is based on the principle of light transmission, wherein a diode is used to emit light which is received by a phototransistor to produce an output in the output circuit.

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