A5367CA Allegro Microsystems Inc, A5367CA Datasheet

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A5367CA

Manufacturer Part Number
A5367CA
Description
IC SMOKE DETECTOR ION 16-DIP
Manufacturer
Allegro Microsystems Inc
Type
Smoke Detectorr
Datasheet

Specifications of A5367CA

Input Type
Voltage
Output Type
Voltage
Interface
CMOS
Current - Supply
12µA
Mounting Type
Through Hole
Package / Case
16-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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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 applications, per file # S2113
Package: 16-pin DIP (suffix A)
Not to scale
26110.9 Rev. H
9 V
To / from
other units
50 kΩ
1 μF
8.2 MΩ
200 Ω
C
Timer
Mode
330 Ω
1
2
3
4
5
6
7
8
TIMER START
I/O
LOW-V SET
TIMER OUT
LED
VDD
TIMING RES
FEEDBACK
B
A5367
200 kΩ
SENSITIVITY SET
Typical Application
DETECT IN
OSC CAP
GUARD1
GUARD2
HORN2
HORN1
VSS
16
15
14
13
12
11
10
9
Description
The A5367 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 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.
with Interconnect and Timer
0.1 μF
Ionization Smoke Detector
1.5 MΩ
220 kΩ
A
D
200 k Ω
D
Push
to Test
A
B
0.001 μF
C
D
Use an external resistor to adjust
sensitivity for a particular smoke chamber.
Select resistor to reduce sensitivity
during Timer mode.
D
A resistor to VSS or VDD may
be added to this pin to modify
low battery voltage threshold.
Value of component will vary, based on
the piezoelectric horn used.
A5367

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A5367CA Summary of contents

Page 1

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 ...

Page 2

... A5367 Selection Guide Part Number Pb-Free A5367CA-T Yes A5367CA – Absolute Maximum Ratings* Characteristic Supply Voltage Range Input Voltage Range Reverse Battery Condition Duration Input Current Operating Ambient Temperature Junction Temperature Storage Temperature Range * CAUTION: CMOS devices have input static protection but are susceptible to damage when exposed to extremely high static electrical charges. ...

Page 3

A5367 +Supply 9V VDD LBSamp Low Battery Sample LOW-V SET SENSITIVITY SET SSamp Smoke Sample -Supply VSS Functional Block Diagram I Band Gap Low Battery 600 kΩ Comparator _ Logic + 500 kΩ Smoke Comparator LBSamp ...

Page 4

A5367 ELECTRICAL CHARACTERISTICS R = 8.2 MΩ (unless otherwise noted) TIMINGRES Characteristic Symbol Supply Voltage Range V DD Supply Current I DD Detector Input Current I DETECTIN V OS(GUARD1) Input Offset Voltage V OS(GUARD2 Hysteresis V HYS V ...

Page 5

A5367 ELECTRICAL CHARACTERISTICS R = 8.2 MΩ (unless otherwise noted) TIMINGRES Characteristic Symbol I IOL I/O Current I IOH I DUMP I/O Charge Dump Duration t DUMP I/O Alarm Voltage V IH(IO) I/O Delay t r(io) 1 Negative current is ...

Page 6

A5367 of the ionization chamber by connecting a resistor between the SENSITIVITY SET pin and either the VDD or VSS pins. With no external connections on the SENSITIVITY SET pin, while the A5367 is checking for smoke ...

Page 7

A5367 Standby Mode OSC CAP Pin Internal Clock Smoke Sample Low Battery Test LED Pin Timer Mode Internal Clock TIMER START Pin TIMER OUT Pin LED Pin Low Battery Condition VDD Pin Low Battery Test LED Pin LED off (High-Z) ...

Page 8

A5367 Local Smoke Detection/Test Alarm Condition Test event Smoke Sample Smoke Chamber LED Pin LED on Horn Enable I/O Pin Remote Alarm Condition LED Pin Horn Enable I/O Pin with Interconnect and Timer t osc(alarm) OSC CAP Pin Internal Clock ...

Page 9

A5367 A .005 [1.27] Allegro MicroSystems offers an industry-leading range of ionization and photoelectric smoke detector ICs. For a current listing, please visit our website at: Copyright ©2001-2008, Allegro MicroSystems, Inc. The products described here are manufactured under one or ...

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