PT8A2612 Datasheet, PDF (4/13 Pages) Pericom Semiconductor Corporation – PIR Sensor Light Switch Controller

Data Sheet
PT8A261/262
PIR Sensor Light Switch Controller
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Pin Assignment
Figure 2
PT8A261P/PT8A261W
PT8A262P/PT8A262W
GND
TRIAC
OSCD
OSCS
ZC
CDS
MODE
V_CC
1 16
2 15
3 14
4 13
5 12
6 11
7 10
8
9
Top view
OP2O
OP2N
OP2P
OP1O
OP1N
OP1P
RST
V_EE
GND
RELAY
OSCD
OSCS
ZC
CDS
MODE
V_CC
1 16
2 15
3 14
4 13
5 12
6 11
7 10
8
9
Top view
OP2O
OP2N
OP2P
OP1O
OP1N
OP1P
RST
V_EE
Pin Description
Table 1
Pin/Pad
Name
261 262
Type
Description
1 1 GND Ground Ground
2 RELAY O RELAY drive output through an external NPN transistor, active high
2
TRIAC O TRIAC drive two-pulse output, active negative pulse.
3 3 OSCD I/O Output timing oscillator I/O, connected to an external RC to adjust output duration.
4
4 OSCS
I/O
System oscillator I/O, connected to an external RC to set the system frequency. The system
frequency = 16kHz for normal application.
55
ZC
I Schmitt input for AC zero crossing detection.
6 6 CDS
I
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.
7 7 MODE
I
Mode select, connecting to V - output always on, connection GND - output always off,
open - auto detection
CC
8
8
V_CC Power Power supply
99
V_EE
O
Internal voltage regulator output, 3.6V with respect to ground. Connected to the drain of
PIR sensor
10 10 RST
I Chip reset input, active low, kept floating or connected an RC network
11 11 OP1P
I Non-inverted input of first operational amplifier, connected directly to source of PIR sensor
12 12 OP1N
I Inverted input of first operational amplifier
13 13 OP1O
O Output of first operational amplifier
14 14 OP2P
I Non-inverted input of second operational amplifier.
15 15 OP2N
I Inverted input of second operational amplifier
16 16 OP2O
O Output of second operational amplifier
PT0075(04/03)
4
Ver:5