HT7612

HT7612/HT7612B General Purpose PIR Controller Features · Operating voltage: 2.7V ~ 5.5V · Standby current typical: HT7612: 17mA HT7612B: 19mA · CDS input · CDS debounce time: HT7612: 15~20 seconds HT7612B: < 3 seconds · High noise immunity Applications · PIR light control · Motion detectors · 40 second power-on delay · 10 second high speed warm-up for test mode · 1~3783 second adjustable PIR turn on time. · Output drive for Relay, TRIAC and LED · Output drive buzzer alarm · Low voltage detector · Override function · 16-pin DIP/NSOP packages · Alarm system · Auto door bells General Description The HT7612/HT7612B is PIR controller specifically designed to interface to PIR sensors to implement motion sensing application products such as intruder alarms. The controller has the features of PIR sensitivity adjust- ment and a CDS can be connected to the controller for automatic detection. The HT7612/HT7612B is available in low profile NSOP & DIP packages. Selection Table Part No. HT7612 HT7612B CDS Debounce Time 15~20 seconds < 3 seconds Block Diagram O P 2O O P 2N O P 1O O P 1N O P 1P A m p lifie r C ir c u it VDD VSS C o m p a ra to r C ir c u it VREF DT T E S T /S C LD O & R e fe r a n c e V o lta g e T im in g D e la y S y s ta m O s c illa to r C o n tro l C ir c u it B U Z /L V D B U Z /C D S R E L A Y /L E D T R A IC ZC M ODE Rev. 1.70 1 July 16, 2012 HT7612/HT7612B Pin Assignment O P 1P O P 1N O P 1O O P 2N O P 2O VREF DT VSS 1 2 3 4 5 6 7 8 1 6 T E S T...