5368 Datasheet, PDF (1/8 Pages) Allegro MicroSystems – SMOKE DETECTOR WITH INTERCONNECT AND TIMER

5368
SMOKE DETECTOR
WITH INTERCONNECT AND TIMER
TIMER START 1
I/O 2
LOW-V SET 3
TIMER OUT 4
LED 5
+ SUPPLY 6 V _DD
TIMING RES. 7
FEEDBACK 8
LOGIC
OSC. &
TIMING
HORN
DRIVER
16 GUARD ₂
15 DETECT. IN
14 GUARD1
13
SENSITIVITY
SET
12 OSC. CAP.
11 HORN ₂
10 HORN1
V_SS 9 – SUPPLY
Dwg. PC-004
The A5368CA 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 A5368CA 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 V_SS)
Supply Voltage Range,
V_DD ................................ -0.5 V to +15 V
Reverse Battery (10.5 V) ....................... 20 s
Input Voltage Range,
V_IN ........................ -0.3 V to V_DD + 0.3 V
Input Current, I_IN ............................... 10 mA
Operating Temperature Range,
T_A ..................................... 0°C to +50°C
Storage Temperature Range,
T_S ............................... -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
s Internal Timer & Control for Reduced Sensitivity
s Built-In Hysteresis Reduces False Triggering
s Temporal Horn Pattern
Always order by complete part number: A5368CA .