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PDF 5355 Data sheet ( Hoja de datos )

Número de pieza 5355
Descripción SMOKE DETECTOR WITH INTERCONNECT
Fabricantes Allegro MicroSystems 
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No Preview Available ! 5355 Hoja de datos, Descripción, Manual

5355
NO CONNECT. 1 NC
I/O 2
LOW-V SET 3
LOGIC
NO CONNECT. 4 NC
LED 5
OSC. &
TIMING
+ SUPPLY 6 V DD
TIMING RES. 7
HORN
DRIVER
FEEDBACK 8
16 GUARD 2
15 DETECT. IN
14 GUARD1
13
SENSITIVITY
SET
12 OSC. CAP.
11 HORN 2
10 HORN 1
V SS 9 – SUPPLY
Dwg. PC-004-1
SMOKE DETECTOR
WITH INTERCONNECT
The A5355CA is a low-current, CMOS circuit providing all of the
required features for an ionization-type smoke detector. A networking
capability allows as many as 125 units to be interconnected so that if
any unit senses smoke, all units will sound an alarm. In addition,
special features are incorporated to facilitate alignment and test of the
finished smoke detector. This device is designed to comply with
Underwriters Laboratories Specification UL217.
The internal oscillator and timing circuitry keeps standby power to
a minimum by powering down the device for 1.66 seconds and sensing
smoke for only 10 ms. Every 24 on/off cycles, a check is made for low
battery condition. By substituting other types of sensors, or a switch
for the ionization detector, this very-low power device can be used in
numerous other battery-operated safety/security applications.
The A5355CA is supplied in a low-cost, 16-pin dual in-line plastic
package. It is rated for continuous operation over the temperature
range of 0°C to +50°C.
ABSOLUTE MAXIMUM RATINGS
(Voltages are referenced to VSS)
Supply Voltage Range,
VDD ................................ -0.5 V to +15 V
Reverse Battery (10.5 V) ....................... 20 s
Input Voltage Range,
VIN ........................ -0.3 V to VDD + 0.3 V
Input Current, IIN ............................... 10 mA
Operating Temperature Range,
TA ..................................... 0°C to +50°C
Storage Temperature Range,
TS ............................... -55°C to +125°C
CAUTION: CMOS devices have input static
protection but are susceptible to damage when
exposed to extremely high static electrical
charges.
FEATURES
s Interconnect Up to 125 Detectors
s Piezoelectric Horn Driver
s Guard Outputs for Detector Input
s Pulse Testing for Low Battery
s Power-ON Reset
s Internal Reverse Battery Protection
Always order by complete part number: A5355CA .

1 page




5355 pdf
5355
SMOKE DETECTOR
WITH INTERCONNECT
V12
OSC. CAP
INTERNAL
CLOCK
LED
SMOKE
COMPARATOR
HORN
TYPICAL APPLICATION
9V
TO
OTHER
UNITS
200
1 NC
2
NOTE
2
3
4 NC
330
5
LOGIC
OSC. &
TIMING
8.2 M
6 V DD
7
HORN
DRIVER
1 µF
8
16
15
14
13
12
11
10
V SS 9
0.1 µF
PUSH
TO
TEST
NOTE 1
0.001 µF
Dwg. EC-005-5
NOTE 1: An external resistor divider is used to adjust sensitivity for the particular
smoke chamber.
NOTE 2: Abartetesrisytovor lttoaggerotuhnredsohrolVdD. D may be added to this pin to modify low
TIMING DIAGRAMS IN TYPICAL APPLICATION
NO ALARM
NO LOW BATTERY
STANDBY MODE
ALARM
NO LOW BATTERY
ALARM AND
LOW BATTERY
NO ALARM
LOW BATTERY
1.67 s
10 ms
40 ms
24 CLOCK CYCLES
LED OFF
SAMPLE
24 CLOCK CYCLES
LED
ON
12 CLOCK CYCLES
6 CLOCK CYCLES
6 CLOCK CYCLES
HORN
ON
OFF
30 CLOCK CYCLES
LOW BATTERY
WARNING
SMOKE
CHAMBER
V15 < V13 (NO SMOKE)
V15 > V13 (SMOKE)
Dwg. WC-003-1

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