Part Number	QSD122 Datasheet
Manufacturer	Fairchild Semiconductor
Overview	The QSD122/123/124 is a phototransistor encapsulated in an infrared transparent, black T-1 3/4 package. FEATURES • NPN Silicon Phototransistor • Package Type: T-1 3/4 • Notched Emitter: QED12X/QED22X. * NPN Silicon Phototransistor * Package Type: T-1 3/4 * Notched Emitter: QED12X/QED22X/QED23X * Narrow Reception Angle: 24°C * Daylight Filter * Package Material and Color: Black Epoxy * High Sensitivity  2001 Fairchild Semiconductor Corporation DS300361 7/20/01 1 OF 4 PLA.