PC81720NSZ

Output Type:	Transistor
Supplier Device Package:	4-DIP
Package / Case:	4-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-30°C ~ 100°C
Vce Saturation (Max):	300mV
Current - DC Forward (If) (Max):	10mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	50mA
Voltage - Output (Max):	70V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	4µs, 3µs
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	--
Current Transfer Ratio (Min):	--
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Part Status:	Obsolete
Packaging:	Tube

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PC81720NSZ is a type of optoisolator, which is also known as an optical coupler. It utilizes photocouplers and optoelectronic devices in order to provide electrical isolation between two different circuits. This type of optoisolator is classified as a transistor, photovoltaic output, which means that it includes a photodiode, phototransistor, and a driver transistor in order to condition the electrical signal.The PC81720NSZ optoisolator can operate from -55°C to 125°C; it has a static current transfer ratio (CTR) of 50% minimum, and a response time of 4.5 μs maximum. Furthermore, it has a minimum collector-emitter voltage (VCE(SAT)) of 0.3V at an I/O current of 1 mA. PC81720NSZ optoisolators are commonly used in electrical isolation and switching between current loops. In a current loop application, the optoisolator may be used to isolate the control system from the line voltage and to protect the control system from voltage surges or power transient. As a result, PC81720NSZ optoisolators are widely used in power supplies, factory automation equipment, home appliances, medical equipment, and automobiles. The working principle of the PC81720NSZ optoisolator is simple. It consists of an infrared light-emitting diode (LED) on the input side and a phototransistor on the output side. When the forward voltage is applied to the LED, the LED emits infrared light which falls onto the phototransistor, activating the phototransistor and allowing current to flow from the collector to the emitter. The amount of current flowing through the phototransistor is determined by the amount of light being emitted by the LED; the brighter the light, the more current will flow. This current flow causes a voltage difference across the collector-emitter of the phototransistor and this voltage difference is the output of the PC81720NSZ. In addition to its electrical isolation capabilities, the PC81720NSZ optoisolator has a number of other features that make it ideal for various applications. It has a high surge withstanding capacity, a high noise immunity, a low power consumption, and high reliability. Furthermore, it is compatible with TTL, CMOS, and PMOS logic families.Overall, the PC81720NSZ optoisolator offers an efficient electrical isolation in a variety of applications. With its high surge withstanding capacity, low power consumption, high noise immunity, and high reliability it is a great choice for current loop applications.

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