37833

Supply Voltage ........................................-0.3V to 13V
Storage Temperature ...........................-50 to 125
Input Voltage ..........................V_SS-0.3V to V_DD+0.3V
Operating Temperature ..........................-25 to 70
Zero Crossing Current ..............................Max. 300A
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings ma
cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.

The 37833 is a CMOS LSI chip designed for use in automatic PIR lamp control. 37833 can operate with a 2-wire configuration for triac applications or with a 3-wire configuration for relay applications. The chip is equipped with operational amplifiers, a comparator, timer, a zero crossing detector, control circuit, a voltage regulator, a system oscillator, and an output timing oscillator. Its PIR sensor detects infrared power variations induced by the motion of a human body and transforms it to a voltage variation. If the PIR output voltage variation conforms to the criteria (refer to the functional description), the lamp is turned on with an adjustable duration.

The 37833 offers three operating modes (ON, AUTO, OFF) which can be set through the MODE pin. While the chip is working in the AUTO mode the user can override it and switch to the TEST mode, or manual ON mode, or return to the AUTO mode by switching the power switch.