HT7612_12 Datasheet, PDF (1/23 Pages) Holtek Semiconductor Inc – General Purpose PIR Controller

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 de-
signed 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