HOA1877-001

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Optical Sensors - Photointerrupters - Slot Type - Transistor Output

HOA1877-001 is an optical sensor that utilizes a slot-type photointerrupter that uses an N-channel open-drain transistor for outputting. Applications of the HOA1877-001 include presence/absence, approach and slot type sensing. It is also ideal for use in automotive and industrial switches, sensors, and safety devices.

Features

• Low profile surface mount (5.2 mm x 2.75 mm)
• Compact 3-pin package
• High reliability: electrical isolation distance of 5 mm
• Low current consumption of 6 mA typ
• RoHS Compliant
• 2.7 to 12.0V operation

Principle of Operation

The photointerrupter in the HOA1877-001 utilizes a pair of LED transmitters spaced a few millimeters apart in its sensing head, with a slit between them. When light from the LED transmitters is interrupted (e.g. by a finger passing or an object moving across the slit), the photointerrupter outputs a digital signal via the N-channel open-drain transistor.

Applications

The HOA1877-001 is suitable for use in a range of safety and presence/approach sensing applications, such as industrial, automotive and consumer product sensing. It is also designed to operate in temperatures ranging from -25°C to 85°C. It can be used in slot type sensing and non-contact sensing and switching applications, including:

• Automotive switches
• Industrial safety switches
• Presence/absence detection
• Approach sensing
• Non-contact switches (e.g. door open/closed detection)

Conclusion

The HOA1877-001 is an ideal sensing device for a range of safety and approach sensing applications. Utilizing a slot-type photointerrupter, it offers high reliability, low current consumption, and excellent temperature performance. It is suitable for use in automotive switches, industrial safety switches, and consumer product sensing, making it an ideal choice for a variety of applications.

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