pt8a2621w Pericom Technology Inc, pt8a2621w Datasheet - Page 4

• Manufacturer Part Number: pt8a2621w
• Description: Pir Sensor Light Switch Controller
• Manufacturer: Pericom Technology Inc

PT0091(11/03)
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Pin Assignment
Pin Description
2611 2621
10
11
12
13
14
15
16
2
4
1
3
5
6
7
8
9
Pin
10
12
13
14
15
16
11
2
3
4
5
6
7
8
9
1
RELAY
TRIAC
MODE
OSCD
Name
OSCS
OP1N
OP1O
OP2N
OP2O
OP1P
OP2P
GND
CDS
RST
V
V
ZC
TRIAC
MODE
CC
EE
OSCD
OSCS
GND
CDS
V
ZC
PT8A2611P/PT8A2611W
CC
Ground Ground
Power
Type
I/O
I/O
O
O
O
O
O
I
I
I
I
I
I
I
I
1
2
3
4
5
6
7
8
Top view
Output timing oscillator I/O, connected to an external RC to adjust output duration.
System oscillator I/O, connected to an external RC to set the system frequency. The system
Schmitt input for AC zero crossing detection.
Output of first operational amplifier
Output of second operational amplifier
RELAY drive output through an external NPN transistor, active high
TRIAC drive two-pulse output, active negative pulse.
frequency = 16kHz for normal application.
Connected to a CDS voltage divider for daytime/night auto-detection. Low input to this pin
can disable PIR input. CDS is a schmitt trigger input with 5-second input debounce time.
Mode select, connecting to V
open - auto detection
Power supply
Internal voltage regulator output, 3.6V with respect to ground. Connected to the drain of
PIR sensor
Chip reset input, active low, kept floating or connected an RC network
Non-inverted input of first operational amplifier, connected directly to source of PIR sensor
Inverted input of first operational amplifier
Non-inverted input of second operational amplifier.
Inverted input of second operational amplifier
16
15
14
13
12
11
10
9
OP2O
OP2N
OP2P
OP1O
OP1N
OP1P
RST
V
EE
4
CC
- output always on, connection GND - output always off,
RELAY
MODE
OSCD
OSCS
GND
CDS
PIR Sensor Light Switch Controller
V
ZC
PT8A2621P/PT8A2621W
CC
Description
1
2
3
4
5
6
7
8
Top view
16
15
14
13
12
11
10
9
OP2O
OP2N
OP2P
OP1O
OP1N
OP1P
RST
V
EE
PT8A2611/2621
Data Sheet
Ver:3