HT761X
General Purpose PIR Controller
Features
·
·
Operating voltage: 5V~12V
ON/AUTO/OFF selectable by MODE pin
·
·
Override function
Standby current: 100mA (Typ.)
·
·
Auto-reset if the ZC signal disappears over 3
On-chip regulator
seconds
·
Adjustable output duration
·
16-pin DIP package
·
CDS input
·
40 second warm-up
Applications
·
·
PIR light controllers
Alarm systems
·
·
Motion detectors
Auto door bells
General Description
The HT761x is a CMOS LSI chip designed for use in au-
tomatic PIR lamp control. It can operate with a 2-wire
configuration for triac applications or with a 3-wire con-
figuration 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.
voltage variation. If the PIR output voltage variation con-
forms to the criteria (refer to the functional description),
the lamp is turned on with an adjustable duration.
The HT761x 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.
Its PIR sensor detects infrared power variations induced
by the motion of a human body and transforms it to a
Selection Table
ZC Off/On
for Override
Flash on Mde
Auto-change
Override ON
Duration
Comparator
Window
Effective Trigger
Width
Part No.
1
HT7610A
HT7610B
(VDD-VEE
)
2 times
1 time
Flash
8 hrs
8 hrs
>24ms
>24ms
16
1
HT7611A
HT7611B
(VDD-VEE
)
No flash
16
Note: Part numbers suffixed with A are for Relay application while those suffixed with B are for Triac application.
Pin Assignment
V
S
S
V
S
S
O
O
O
O
O
O
P
P
P
P
P
P
2
2
2
1
O
N
P
O
O
O
O
O
O
O
P
P
P
P
P
P
2
2
2
1
1
1
O
N
P
O
N
P
1
2
3
4
5
6
7
8
1
1
1
1
1
1
1
6
5
4
3
2
1
0
1
2
3
4
5
6
7
8
1
1
1
1
1
1
1
6
5
4
3
2
1
0
R
E
L
A
Y
T
R
I
A
C
O
S
C
D
O
S
C
D
O
S
C
S
O
S
C
S
Z
C
Z
C
1
N
C
V
D
S
C
V
D
S
1
P
M
O
D
E
M
O
D
E
R
S
T
R
S
T
D
D
D
D
V
E
E
V
E
E
9
9
H
T
7
6
1
X
B
H
T
7
6
1
X
A
1
6
D
I
P
-
A
1
6
D
I
P
-
B
T
R
I
A
C
V
E
R
S
I
O
N
R
E
L
A
Y
V
E
R
S
I
O
N
Rev. 1.30
1
October 12, 2009