參數(shù)資料
型號(hào)： A5364CA
廠商： Allegro MicroSystems, Inc.
英文描述： SMOKE DETECTOR WITH INTERCONNECT
中文描述： 煙霧探測(cè)器與互連
文件頁(yè)數(shù)： 5/8頁(yè)
文件大?。?/td> 156K
代理商： A5364CA
5364
SMOKE DETECTOR
WITH
INTERCONNECT
www.allegromicro.com
19 CLOCK CYCLES
1.67 s
STANDBY MODE
10 ms
40 ms
24 CLOCK CYCLES
V15 > V13 (NO SMOKE)
V15 < V13 (SMOKE)
V12
OSC. CAP
ICLOCK
LED
COSMOKE
SMOKE
CHAMBER
HORN
SAMPLE
NO LALARM
30 CLOCK CYCLES
LOW BATTERY
WARNING
HORN
"A"
LALARM AND
LNO ALARM
Dwg. WC-003-3
24 CLOCK CYCLES
LED OFF
LED
ON
1CYCLES
CYCLES
36 CLOCK CYCLES
OHORN
"B"
CYCLES
24 CLOCK CYCLES
73 CLOCK CYCLES
I/O
ARE DIFFERENT TIME SCALES
HORN "C"
I/O.
A connection is provided at pin 2 to
allow multiple smoke detectors to be
commoned. If any single unit detects smoke
(I/O is driven high), all connected units will
sound their associated horns after a nominal 3
second delay. The LED is suppressed when
an alarm is signaled from an interconnected
unit.
Testing.
On power up, all internal counters
are reset. Internal test circuitry allows for
low battery check by holding pins 8 and 12
low during power up, then reducing V
DD
and
monitoring HORN
1
(pin 10). All functional
tests can be accelerated by driving pin 12
with a 2 kHz square wave. The 10 ms strobe
period must be maintained for proper opera-
tion of the comparator circuitry.
TYPICAL APPLICATION
TO
OTHER
UNITS
NOTE
1
NOTE
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
LOGIC
OSC. &
TIMING
HORN
DRIVER
V
DD
Dwg. EC-005-4
V
SS
9 V
PUSH
TO
TEST
200 k
2
200
8.2 M
1
μ
F
0.1
μ
F
1
3
0.001
μ
F
330
NC
NC
NOTE 1: Use an external resistor to adjust sensitivity for a particular smoke
chamber.
NOTE 2: A resistor to ground or V
DD
may be added to this pin to modify low
battery voltage threshold.
TIMING DIAGRAM IN TYPICAL APPLICATION
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