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Allegro - Ionization Smoke Detector

Numéro de référence A5364
Description Ionization Smoke Detector
Fabricant Allegro 
Logo Allegro 





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A5364 fiche technique
A5364
Ionization Smoke Detector
with Interconnect
Features and Benefits
Low average standby current for long battery life
Interconnect up to 125 detectors
Piezoelectric horn driver
Guard outputs for detector input
Pulse testing for low battery
Power-on reset (POR)
Internal reverse battery protection
Built-in hysteresis reduces false triggering
Temporal horn pattern, per UL217, NFPA72, and ISO8201
UL Recognized for UL217 applications, per file # S2113
Package: 16-pin DIP (suffix A)
Not to scale
Description
The A5364 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 their alarm. In addition, special features are incorporated
to facilitate alignment and test of the finished smoke detector.
The device is Recognized by Underwriters Laboratories for use
in smoke alarms that comply with Standard UL217.
The internal oscillator and timing circuitry keep standby power
to a minimum by powering down the device for 1.66 seconds
and sensing for smoke for only 10 ms. Every 24 on-off cycles,
a check is made for a 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 A5364 is supplied in a low-cost 16-pin dual in-line plastic
package (DIP). It is rated for continuous operation over the
temperature range of 0°C to 50°C. The Pb (lead) free version
(suffix –T) has 100% matte tin leadframe plating.
Typical Application
To / from
other units
200 Ω
B
1 NC
200 kΩ
16
GUARD2
2
I/O
15
DETECT IN
A5364
3
LOW-V SET
14
GUARD1
4 NC
330 Ω 5 LED
SENSITIVITY SET 13
12
OSC CAP
9V
6 VDD
11
HORN2
8.2 MΩ 7 TIMING RES
10
HORN1
1 μF 8 FEEDBACK
9
VSS
200 k Ω
Push
to Test
A
0.1 μF
A Use an external resistor to adjust
sensitivity for a particular smoke chamber.
B A resistor to VSS or VDD may
be added to this pin to modify
low battery voltage threshold.
C Value of component will vary, based on
the piezoelectric horn used.
1.5 MΩ
C
220 kΩ
C
0.001 μF
C
26110.7E

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