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RE46C144TSW 데이터 시트보기 (PDF) - Microchip Technology
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RE46C144TSW
CMOS Photoelectric Smoke Detector ASIC with Interconnect and Timer Mode
Microchip Technology
RE46C144TSW Datasheet PDF : 26 Pages
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RE46C144
Functional Block Diagram
VDD (5)
VSEN (15)
Low Battery
+
-
+
-
Smoke Comparator
Logic and
Timing
DETECT (3)
C1 (1)
C2 (2)
STROBE (4)
TEST (16)
VSS (14)
V
DD
-3.5V
PHOTOAMP
+
-
V
DD
-5V
Bias and
Power Reset
Oscillator
Horn Driver
IO (7)
FEED (10)
HS (9)
HB (8)
LED (11)
IRED (6)
ROSC (13)
COSC (12)
Typical Application
9v
Battery
C3
1 µF
R
ADJ1
R3
8.2k
C1
.047 µF
R2
5k
C2
1
4700 pF
R4
2
560
R
ADJ2
R1
4.7k
D6
R5
3
250k
4
5
Q3
R6
D5
6
1k
C4
Smoke Chamber
100 µF
R7
22
7
8
To Other Units
R8
330
Push-to-Test
16
15
R12
D3
10M
14
C5
1.5nF
R9
13
100k
R13
12
330
11
10
C6
R11
9
1.0nF
220k
R10
1.5M
Note 1:
2:
3:
C3 should be located as close as possible to the device power pins.
C3 is typical for an alkaline battery. This capacitance should be increased to 4.7 µF or greater for a carbon battery.
R10, R11 and C6 are typical values and may be adjusted to maximize sound pressure.
DS22180C-page 2
2009-2012 Microchip Technology Inc.
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