5366 Datasheet PDF - Allegro

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5366
Allegro

Part Number 5366
Description PHOTOELECTRIC SMOKE DETECTOR
Page 12 Pages


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5366
PHOTOELECTRIC SMOKE DETECTOR
WITH INTERCONNECT AND TIMER
C1 1
C2 2
DETECT 3
STROBE 4
+ SUPPLY 5 VDD
IRED 6
I/O 7
HORN1 8
16 TEST
15 HUSH
VSS 14 – SUPPLY
OSC. &
TIMING
13 TIMING RES.
12 OSC. CAP.
LOGIC
11 LED
HORN
DRIVER
10 FEEDBACK
9 HORN2
Dwg. PC-007
The selectable Hush Feature may be covered
by U.S. patent number Re. 33,920. Any sale
or use of the Hush Feature in a smoke alarm
in the U.S. would be a possible infringement
of this patent.
The A5366CA is a low-current BiCMOS circuit providing all of the
required features for a photoelectric type smoke detector. This device
can be used in conjunction with an infrared photoelectric chamber to
sense scattered light from smoke particles. Special features are
incorporated in the design to facilitate calibration and testing of the
finished detector. The device is designed to comply with Underwriters
Laboratories Specification UL217.
A variable-gain photo amplifier can be directly interfaced to an
infrared emitter/detector pair. The amplifier gain levels are determined
by two external capacitors that are then 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
~10% to reduce false triggering. High gain is used during the push-
button test and during standby to periodically monitor the chamber
sensitivity.
The internal oscillator and timing circuitry keeps standby power to
a minimum by sensing for smoke every 10 seconds in a 100 µs
window. A special three-stage speedup sensing scheme is incorpo-
rated to minimize the time to an audible alarm and also to reduce false
triggering. Also, two consecutive cycles of degraded chamber sensitiv-
ity are required for a warning signal to occur.
The A5366CA is supplied in a low-cost 16-pin dual in-line plastic
package. It is rated for continuous operation over the temperature
range of -25°C to +75°C.
ABSOLUTE MAXIMUM RATINGS
(Voltages are referenced to VSS)
Supply Voltage Range,
VDD .................................... -0.5 V to +15 V
Input Voltage Range,
VIN ............................ -0.3 V to VDD + 0.3 V
Input Current, IIN ................................... 10 mA
Operating Temperature Range,
TA ..................................... -25°C to +75°C
Storage Temperature Range,
TS ................................... -55°C to +125°C
CAUTION: CMOS devices have input static
protection but are susceptible to damage if exposed
to extremely high static electrical charges.
FEATURES
s Interconnect Up to 50 Detectors
s Piezoelectric Horn Driver
s All Internal Low-Battery Detection
s Power-ON Reset
s Internal Timer & Control for Reduced Sensitivity
s Built-In Circuits to Reduce False Triggering
s 6 V to 12 V Operating Voltage Range
s ESD-Protection Circuitry on All Pins
s Temporal Horn Pattern
Always order by complete part number: A5366CA .



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5366
PHOTOELECTRIC SMOKE DETECTOR
with INTERCONNECT and TIMER
FUNCTIONAL BLOCK DIAGRAM
+ SUPPLY V DD
5
9V
BAND-GAP
REFERENCE
I/O
7
V DD
DETECT 3
C1 1
C2 2
STROBE 4
IRED 6
V DD
SUPPLY
14
V SS
LOW BATTERY
PHOTO AMP
LOGIC
POWER-ON
RESET
OSCILLATOR
& TIMING
15
HUSH
16
TEST
FEEDBACK
10
9
HORN 2
8
HORN 1
11
LED
TIMING RES.
13
12
OSC. CAP.
+V
+V
Dwg. FC-006
115 Northeast Cutoff, Box 15036
2 Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2001, 2002 Allegro MicroSystems, Inc.



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5366
PHOTOELECTRIC SMOKE DETECTOR
with INTERCONNECT and TIMER
DC ELECTRICAL CHARACTERISTICS at TA = -25°C to +75°C*, VSS = 0 V, in typical application
(unless otherwise noted).
Characteristic
Supply Voltage Range
Operating Supply Current
Low-Level Input Voltage
High-Level Input Voltage
Input Leakage High
Input Leakage Low
Input Pull-Down Current
Low-Level Output Voltage
High-Level Output Voltage
Strobe Output Voltage
Symbol
VDD
IDD
VIL
VIH
IIH
IIL
IIN
VOL
VOH
VST
Test Conditions
Test
Pin
5
Average Standby
Configured per Figure 1
5
During Strobe ON, IRED OFF,
Configured per Figure 1
5
During Strobe ON, IRED ON,
Configured per Figure 1
5
7
10
16
15
7
10
16
15
VIN = VDD, Strobe Active,
Pin 12 @ VDD
VIN = VDD
VIN = VST, Strobe Active,
Pin 12 @ VDD
VIN = VSS
1, 2
3, 10, 12
1, 2, 3
10, 12
15, 16
VIN = VDD
No Local Smoke, VIN = VDD
No Local Smoke, VIN = 17 V
IO = 10 mA
IO = 16 mA
IO = 5 mA
IO= -16 mA
Inactive IO = -1 µA
Active, IO = 100 µA to 500 µA
16, 15
7
7
11
8, 9
13
8, 9
4
4
Limits
VDD Min. Typ. Max. Units
6.0 12 V
12
12 µA
12
2.0 mA
12
3.0 mA
9
9
9
9
1.5 V
2.7 V
7.0 V
0.5 V
9 3.2
9 6.3
9 8.5
9 1.6
V
V
V
V
12
100 nA
12
12
100 nA
-100 nA
12
-100 nA
12
-1.0 µA
9 0.25
10 µA
9 20 80 µA
12
140 µA
6.5
0.6 V
6.5
1.0 V
6.5 0.5 V
6.5 5.5
V
12 VDD - 0.1
V
9 VDD - 5.25 VDD - 4.75 V
Continued...
www.allegromicro.com
3



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5366
PHOTOELECTRIC SMOKE DETECTOR
with INTERCONNECT and TIMER
DC ELECTRICAL CHARACTERISTICS, continued
Characteristic
Symbol Test Conditions
Test
Pin
Line Regulation
VST(VDD) Active, VDD = 6 V to 12 V
4
Strobe Temperature Coeff.
αST VDD = 6 V to 12 V
4
IRED Output Voltage
VIRED Inactive IO = 1 µA, TA = +25°C
6
Active IO = -6 mA, TA = +25°C
6
Line Regulation
VIRED(VDD) Active, VDD = 6 V to 12 V
6
IRED Temperature Coefficient
αIRED
VDD = 6 V to 12 V
6
High-Level Output Current
IOH VDD = Alarm, I/O active,
VO = VDD - 2 V
7
OFF Leakage Current High
IOZ VO = VDD
11, 13
OFF Leakage Current Low
IOZ VO = VSS
11, 13
Low VDD Alarm Threshold
VDD(th)
5
Common Mode Voltage
VIC Any Alarm Condition
1, 2, 3
Smoke Comparator Ref. Volt. VREF Any Alarm Condition
Internal
* Limits over the operating temperature range are based on characterization data.
Characteristics are production tested at +25°C only.
Typical values are at +25°C and are given for circuit design information only.
Limits
VDD Min. Typ. Max. Units
– – -60 dB
– – 0.01 %/°C
12
0.1 V
9 2.85 3.1 3.35 V
-35 dB
– – +0.40 %/°C
9 -4.0
mA
12
1.0 µA
12
-1.0 µA
- 6.9 7.2 7.5 V
- VDD - 4
VDD - 2
V
- VDD - 3.7 VDD - 3.3 V
AC ELECTRICAL CHARACTERISTICS at TA = -25°C to +75°C*, VSS = 0 V, in typical application
(unless otherwise noted).
Characteristic
Oscillator Period
Led Pulse Period
Led Pulse Width
Symbol
tosc
tled1
tled2
tled3
tled4
tw(led)
Test Conditions
No Local or Remote Smoke
Remote Smoke Only
Local Smoke or Test
Timer Mode, No Alarm
Test
Pin
12
11
11
11
11
11
VDD
9
9
9
9
9
9
Min.
9.4
39
None
0.45
9.67
9.5
Limits
Typ. Max. Units
10.5 11.5 ms
48 s
– ––
0.50 0.55
s
10.75 11.83 s
11.5 ms
Continued...
115 Northeast Cutoff, Box 15036
4 Worcester, Massachusetts 01615-0036 (508) 853-5000



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