A5366CA Allegro Microsystems Inc, A5366CA Datasheet

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A5366CA

Manufacturer Part Number
A5366CA
Description
IC SMOKE DETECTOR PHOTO 16-DIP
Manufacturer
Allegro Microsystems Inc
Type
Smoke Detectorr
Datasheet

Specifications of A5366CA

Input Type
Voltage
Output Type
Voltage
Interface
CMOS
Current - Supply
12mA
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 50 detectors
▪ Piezoelectric horn driver
▪ Low battery detection (all internal)
▪ Chamber sensitivity test and alarm
▪ Power-on reset (POR)
▪ Internal timer and control for reduced sensitivity mode
▪ Built-in circuits to reduce false triggering
▪ 6 to 12 V operating range
▪ ESD protection circuitry on all pins
▪ Temporal Horn Pattern, per UL217, NFPA72, and ISO8201
▪ UL Recognized for UL217 or UL268 applications
Packages:
Not to scale
26110.11-DS, Rev. G
(Package A)
16-pin DIP
A
Rx1
Rx2
V
8.2 kΩ
4.7 kΩ
1 kΩ
DD
100 μF
5 kΩ
Smoke
Chamber
other units
To / from
4700 pF
200 kΩ
16-pin SOICW
(Package LW)
0.047 μF
220 Ω
560 Ω
22 Ω
Typical Application Diagram
1
2
3
4
5
6
7
8
DETECT
STROBE
VDD
IRED
HORN1
C1
C2
I/O
A5366
TIMING RES
Photoelectric Smoke Detector
FEEDBACK
OSC CAP
with Interconnect and Timer
HORN2
HUSH
TEST
Description
The A5366 is a low-current BiCMOS circuit providing all of
the required features for a photoelectric type smoke detector.
This device can be used with an infrared photoelectric chamber
to sense scattered light from smoke particles. A networking
capability allows as many as 50 units to be interconnected so that
if any unit senses smoke all units will sound an alarm. Special
features are incorporated in the design to facilitate calibration
and testing of the finished detector. The device is recognized by
Underwriters Laboratories for use in smoke alarms that comply
with Standard UL217, or UL268, per file #S2113.
A variable-gain photoamplifier can be directly interfaced to
an infrared emitter-detector pair. The amplifier gain levels are
determined by two external capacitors and are internally selected
depending on the operating mode. Low gain is selected during
standby and timer modes. During a local alarm, this low gain
is increased (internally) by approximately 10% to reduce false
triggering. High gain is used during pushbutton test and to
periodically monitor the chamber sensitivity during standby.
The internal oscillator and timing circuitry keep standby power
to a minimum by sensing for smoke for only 100 μs every 10 s.
A special three-stage–speedup sensing scheme is incorporated
to minimize the time to an audible alarm and also to reduce
false triggering. Chamber sensitivity is periodically monitored
and two consecutive cycles of degraded sensitivity are required
for a warning signal (chirp) to occur.
The A5366 is supplied in a 16-pin dual in-line plastic package
(suffix A), and for surface mount, a 16-pin SOICW (suffix
LW). The lead (Pb) free versions (suffix –T) have 100% matte-
tin leadframe plating. The devices are rated for continuous
operation over the temperature range of –25°C to 75°C.
VSS
LED
12
11
10
16
15
14
13
9
100 kΩ
1.5 MΩ
B
Push-to-Test
C
1500 pF
1000 pF
220 kΩ
C
C
Red LED
22 μF
Piezo Horn
10 MΩ
330 Ω
9 V
B
C
A
Connect to allow timer mode
("hush") operation
Connect HUSH to VSS
to disable timer mode
Value of component can vary,
based on the piezoelectric horn used
A5366

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A5366CA Summary of contents

Page 1

Features and Benefits ▪ Low average standby current for long battery life ▪ Interconnect detectors ▪ Piezoelectric horn driver ▪ Low battery detection (all internal) ▪ Chamber sensitivity test and alarm ▪ Power-on reset (POR) ▪ Internal ...

Page 2

... A5366 Selection Guide Part Number Pb-free A5366CA – A5366CA-T Yes A5366CLWTR-T Yes Absolute Maximum Ratings* Characteristic Supply Voltage Range Input Voltage Range Input Current Operating Ambient Temperature Range Maximum Junction Temperature Storage Temperature Range *CAUTION: BiCMOS devices have input static protection but are susceptible to damage if exposed to extremely high static electrical charges ...

Page 3

A5366 +Supply VDD Band-gap Reference Low Battery DETECT C1 C2 STROBE VDD IRED Photoelectric Smoke Detector with Interconnect and Timer Functional Block Diagram I/O VDD Logic Photoamp + _ Oscillator and Timing HUSH TEST FEEDBACK HORN2 ...

Page 4

A5366 DC ELECTRICAL CHARACTERISTICS Characteristic Symbol Supply Voltage Range V DD Operating Supply Current I DD Low-Level Input Voltage V IL High-Level Input Voltage V IH Input Leakage High I IH Input Leakage Low I IL Input Pull-Down Current I ...

Page 5

A5366 DC ELECTRICAL CHARACTERISTICS (continued) Characteristic Symbol Line Regulation ΔV IRED(ΔVDD) IRED Temperature Coefficient α IRED High-Level Output Current I OH OFF Leakage Current High I OZ OFF Leakage Current Low I OZ Low-Battery Alarm Threshold V DD(th) Common Mode ...

Page 6

A5366 AC ELECTRICAL CHARACTERISTICS (continued) Characteristic Symbol t ired1 t ired2 t ired3 IRED Pulse Period t ired4 t ired5 t ired6 IRED Pulse Width t w(ired) IRED Rise Time t r(ired) IRED Fall Time t f(ired) I/O to Active ...

Page 7

A5366 C1 Pin A capacitor connected to this pin determines the gain, A the photoamplifier during the push-to-test mode and during the chamber monitor test. A typical capacitor value for this high- gain (supervisory) mode is 0.047 μF, but it ...

Page 8

A5366 OSC CAP (Oscillator Capacitor) Pin A capacitor between this pin and VDD, along with a parallel resistor, forms part of a two-terminal oscillator and sets the inter- nal clock low time. With component values shown, this nominal time is ...

Page 9

A5366 increased to one pulse every OSC CAP cycle and the STROBE pin is always active. To exit this mode, the TEST pin should be floated, or returned for at least one OSC CAP cycle. SS Alarm ...

Page 10

A5366 Standby Mode OSC CAP Pin Internal Clock Photo Sample Low-Battery Test Chamber Test t w(st) STROBE Pin IRED Pin LED Pin Low Battery Condition VDD Pin Low-Battery Test Failed “test period” Horn Enable LED Pin Chirps occur at the ...

Page 11

A5366 Local Smoke Detection Alarm Condition 1st strobe with smoke IRED Pin t t st2, ired2 STROBE Pin t w(led) LED Pin LED on LED off (High-Z) Horn Enable I/O Pin Remote Alarm Condition t w(st) STROBE Pin LED Pin ...

Page 12

A5366 +0.64 19.05 –0. 0.13 MIN 1.52 16X 0.46±0.10 0. 10.30 ±0. 16X 0.10 C 1.27 BSC 0.51 0.31 Photoelectric Smoke Detector with Interconnect and Timer Package A, 16-Pin DIP ...

Page 13

A5366 Allegro MicroSystems offers an industry-leading range of ionization and photoelectric smoke detector ICs. For a current listing, please visit our website at: Copyright ©2009, Allegro MicroSystems, Inc. The products described herein are manufactured under one or more of the ...

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