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零件编号 | A5367 | ||
描述 | Ionization Smoke Detector | ||
制造商 | Allegro | ||
LOGO | |||
1 Page
A5367
Ionization Smoke Detector
with Interconnect and Timer
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
▪ Timer (Hush) mode for enabling reduced sensitivity period
▪ Built-in hysteresis reduces false triggering
▪ Temporal horn pattern, per UL217, NFPA72, and ISO8201
▪ UL Recognized for UL217 or UL268 applications
Package: 16-pin DIP (suffix A):
Description
The A5367 is a low-current, BiCMOS 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 or
UL268, per file #S2113.
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 A5367 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 –10°C to 60°C. The Pb (lead) free version
(suffix –T) has 100% matte tin leadframe plating.
Not to scale
Typical Application
50 kΩ
To / from
other units
9V
Timer
Mode
1
200 Ω 2
C3
4
330 Ω 5
200 kΩ
TIMER START
GUARD2
I/O DETECT IN
A5367
LOW-V SET
GUARD1
TIMER OUT
SENSITIVITY SET
LED OSC CAP
16
15
14
13
12
8.2 MΩ
6 VDD
7 TIMING RES
11
HORN2
10
HORN1
1 μF 8 FEEDBACK
9
VSS
B
200 k Ω
Push
to Test
A
0.1 μF
A Use an external resistor to adjust
sensitivity for a particular smoke chamber.
B Select resistor to reduce sensitivity
during Timer mode.
C A resistor to VSS or VDD may
be added to this pin to modify
low battery voltage threshold.
D Value of component will vary, based on
the piezoelectric horn used.
1.5 MΩ
D
220 kΩ
D
0.001 μF
D
26110.9 Rev. I
A5367
Ionization Smoke Detector
with Interconnect and Timer
Local Smoke Detection/Test Alarm Condition
Test event
tosc(alarm)
OSC CAP Pin
Internal Clock
Smoke Sample
LED Pin
tw(osc)
Smoke Sample
Smoke Chamber
LED Pin
Horn Enable
I/O Pin
24 clock cycles
tw(led)
V DETECTIN < VSENSITIVITYSET (smoke)
tled3
LED on
ton(horn)
toff 2(horn)
tr (i o)
(Output)
(no smoke)
LED off (High-Z)
toff1(horn)
tdump
I/O Charge Dump
Remote Alarm Condition
tosc(alarm)
OSC CAP Pin
Internal Clock
I/O Pin
tw(osc)
LED Pin
Horn Enable
ton(horn)
toff2(horn)
I/O Pin
(Input)
LED off (High-Z)
toff1(horn)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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页数 | 10 页 | ||
下载 | [ A5367.PDF 数据手册 ] |
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