HT7612/HT7612B
General Purpose PIR Controller
Features
·
Operating voltage: 2.7V ~ 5.5V
·
Standby current typical:
·
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
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
·
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.
Block Diagram
V D D
V S S
O P 2 O
O P 2 N
O P 1 O
O P 1 N
O P 1 P
A m p lifie r
C ir c u it
C o m p a ra to r
C ir c u it
V R E F
L D O &
R e fe r a n c e V o lta g e
B U Z /L V D
B U Z /C D S
D T
T im in g
D e la y
C o n tro l
C ir c u it
R E L A Y /L E D
T R A IC
T E S T /S C
S y s ta m
O s c illa to r
Z C
M O D E
Rev. 1.50
1
February 21, 2011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
