OS3502

OS3502 is a kind of high-performance visible light cutoff-type photointerruptor which uses a single-chip light receiving element consisting of a GaAs infrared LED as the light source and a photodiode as the light receiver,as well as an amplifier circuit,Schmitt trigger circuit and voltage regulator circuit on a single chip.The provision of a digital output enables the devices to be directly connected to such systems as microcomputor control systems. The typical applications of OS3502 include timing position detection for rotating machinery such as copiers and printers,photoelectric switches,counters and encoders and start/end detection for cassette and VTR tape equipment.

Here you can get some information about the features of OS3502.First,by unitizing the light-receiving element and surrounding signal processing circuitry,both a reduction in parts count and desigh simplicity have been achieved.The second is directly connectable to TTL,LSTTL and CMOS devices.Then is built-in Schmitt trigger circuit.The last one is wide supply voltage range.(V_CC=4.5 V to 16 V).

What comes next is about the maximum ratings of OS3502(T_a=25).First is for light-emitting side.The I_F (forward current) is 50 mA.The V_R (reverse voltage) is 5 V.Then is for light-receiving side.The V_CC (supply voltage) is 16 V.The I_DL (low-level output current) is 50 mA.The P_O (allowable power dissipation) is 250 mW.The T_opr (operating temperature) is from -25 to +85.The T_stg (storage temperature) is from -30 to +100.Then is about the operating conditions recommendable.The minimum V_CC (supply voltage) is 4.5 V,the typical is 5.0 V.The maximum I_F (forward current) is 15 mA,the typical is 20 mA and the maximum is 25 mA.The T_opr (operating temperature) is from 0 to 70.

The following is about electrical characteristics of OS3502 (T_a=25,0 to 70 unless otherwise noted).First is for light-emitting side.The typical V_F (forward voltage) is 1.15 V and the maximum is 1.40 V at I_F=8 mA.The maximum I_R (reverse current) is 10A at V_R=5 V.Then is for light-receiving side.The minimum V_CC (operating supply voltage) is 4.5 V and the maximum is 16 V at T_a=25.The typical V_OL (low-level output voltage) is 0.15 V and the maximum is 0.4 V at I_OL=16 mA,V_CC=5 V,I_F=0.The minimum V_OH (high-level output voltage) is 4.0 V at I_F=8 mA,V_CC=5 V.The typical I_CCL (low-level supply current) is 6 mA and the maximum is 15 mA at I_F=0,V_CC=5 V.The typical I_CCH (low-level supply current) is 4 mA and the maximum is 10 mA at I_F=8 mA,V_CC=5 V.