Part Number : ICES49H
Package : DIP 16 Pin
Function : PIR Sensor Interface
Manufacturers : Holtek
Reference PDF : https://www.pericom.com/assets/Datasheets/PT8A2651.pdf
The PT8A2651 is a CMOS LSI chip designed for automatic PIR lamp control. 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 PT8A2651 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 quickly install mode or manual ON mode or return to the AUTO mode by switching the power switch. The chip is enclosed in a 16 pin SOIC.