TT electronics Optek Technology has developed a small, surface-mount packaged photo light sensor with a digital output, which is suitable for applications with limited space. Designated the OPL611 series, the sensors feature data rates to 250kBd and consist of a Photologic chip encapsulated in transparent moulded plastic, providing optical coupling as well as mechanical protection. The hysteresis characteristics of the Schmitt trigger on each sensor gives them high noise immunity, claims the company. The sensors are suitable for use in a variety of applications, including machine automation and safety, assembly line automation, non-contact reflective object, and interruptive sensing. The sensors measure 3x3mm and have a height of 1mm, and are mechanically and spectrally matched to the company's OP180, OP200, OP250, OP270 and OP280 series infra red LEDs. Available with buffer and inverter 10K internal pull-up as well as open collector outputs, the sensors feature a direct TTL/LSTTL CMOS interface. Minimum input power is 1.0mW/cm2, VCC ranges from 4.5 to 16V, and operating temperature ranges from -40 to +85°C.
