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5364 Datasheet PDF - Allegro MicroSystems

Part Number 5364
Description SMOKE DETECTOR WITH INTERCONNECT
Manufacturers Allegro MicroSystems 
Logo Allegro MicroSystems Logo 



Preview ( 8 pages )
		
5364 datasheet, circuit
5364
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 A5364CA 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 A5364CA 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. Similar devices. with an internal timer to allow
for a period of reduced sensitivity (“hush”), are available as the
A5368CA.
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
I Interconnect Up to 125 Detectors
I Piezoelectric Horn Driver
I Guard Outputs for Detector Input
I Pulse Testing for Low Battery
I Power-ON Reset
I Internal Reverse Battery Protection
I Built-In Hysteresis Reduces False Triggering
I Temporal Horn Pattern
Always order by complete part number: A5364CA .

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5364 equivalent
5364
SMOKE DETECTOR
WITH INTERCONNECT
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 VDD and
monitoring HORN1 (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
9 V 200 k
1 NC
200
TO
OTHER
UNITS
NOTE
2
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-005-4
NOTE 1: Use an external resistor to adjust sensitivity for a particular smoke
chamber.
NOTE 2: Abatrteesriystvoor lttoaggerothurnedshoorlVd.DD may be added to this pin to modify low
V12
OSC. CAP
NO ALARM
NO LOW BATTERY
STANDBY MODE
1.67 s
10 ms
INTERNAL
CLOCK
24 CLOCK CYCLES
LED
SMOKE
COMPARATOR
LED OFF
LED
ON
SAMPLE
HORN
TIMING DIAGRAM IN TYPICAL APPLICATION
ALARM
NO LOW BATTERY
ALARM AND
LOW BATTERY
NO ALARM
LOW BATTERY
40 ms
19 CLOCK CYCLES
13 CLOCK
CYCLES
12 CLOCK 12 CLOCK
CYCLES
CYCLES
HORN
ON TIME
"A"
HORN
OFF TIME
"B"
24 CLOCK CYCLES
24 CLOCK CYCLES
36 CLOCK CYCLES
HORN OFF TIME
"C"
30 CLOCK CYCLES
LOW BATTERY
WARNING
SMOKE
CHAMBER
I/O
V15 > V13 (NO SMOKE)
V15 < V13 (SMOKE)
SHADED AND UNSHADED AREAS
ARE DIFFERENT TIME SCALES
73 CLOCK CYCLES
Dwg. WC-003-3
www.allegromicro.com

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Information Total 8 Pages
Download[ 5364.PDF Datasheet ]

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