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A5366
Photoelectric Smoke Detector with Interconnect and Timer
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 applications, per file #S2113
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. 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 s 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% mattetin leadframe plating. The devices are rated for continuous operation over the temperature range of -25C to 75C.
Packages:
16-pin DIP (Package A)
16-pin SOICW (Package LW)
Not to scale
Typical Application Diagram
VDD 0.047 F Rx1 A 8.2 k 5 k Rx2 4.7 k 4700 pF 560 1 2 9V A5366 TEST 16 Push-to-Test HUSH VSS TIMING RES 1 k Smoke Chamber 22 100 F 220 8 6 7 IRED I/O HORN1 OSC CAP LED 15 14 13 100 k 12 11 220 k C 1000 pF C 1.5 M C 330 B 1500 pF 10 M Red LED A Connect to allow timer mode ("hush") operation 22 F
C1 C2
200 k
3 DETECT 4 STROBE 5 VDD
B Connect HUSH to VSS to disable timer mode C Value of component can vary, based on the piezoelectric horn used
10 FEEDBACK HORN2 9
Piezo Horn
To / from other units
26110.11-DS, Rev. E
A5366
Selection Guide
Part Number A5366CA A5366CA-T A5366CLWTR-T Pb-free - Yes Yes
Photoelectric Smoke Detector with Interconnect and Timer
Package 16-pin DIP through hole 16-pin DIP through hole 16-pin SOICW surface mount Packing 25 pieces / tube 25 pieces / tube 1000 pieces / reel
Absolute Maximum Ratings*
Characteristic Supply Voltage Range Input Voltage Range Input Current Operating Ambient Temperature Range Maximum Junction Temperature Storage Temperature Range Symbol VDD VIN IIN TA TJ(max) Tstg Range C Referenced to VSS Referenced to VSS Notes Rating -0.5 to 15 -0.3 to VDD+0.3 10 -25 to 75 150 -55 to 125 Units V V mA C C C
*CAUTION: CMOS devices have input static protection but are susceptible to damage if exposed to extremely high static electrical charges.
Thermal Characteristics
Characteristic Package Thermal Resistance Symbol RJA Test Conditions* Package A, on 4-layer PCB based on JEDEC standard Package LW, on 4-layer PCB based on JEDEC standard Value 38 48 Units C/W C/W
*Additional thermal information available on Allegro website.
Terminal List Table
Number Name Function
Pin-out Diagrams Package A
C1 1 C2 2 DETECT 3 STROBE 4 VDD 5 IRED 6 I/O 7 HORN1 8 16 TEST 15 HUSH 14 VSS 13 TIMING RES 12 OSC CAP 11 LED 10 FEEDBACK 9 HORN2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
C1 C2 DETECT STROBE VDD IRED I/O HORN1 HORN2 FEEDBACK LED OSC CAP TIMING RES VSS HUSH TEST
Sets photoamplifier gain in supervisory mode Sets photoamplifier gain in standby mode Photoamplifier input Strobed supply (VDD - 5 V) for photoamplifier low-side reference Positive supply voltage Output to smoke chamber IR LED driver Input-output to interconnected detectors Output for driving piezoelectric horn Complementary output for driving piezoelectric horn Input for driving piezoelectric horn Output to drive visible LED Connection for capacitor to set clock frequency Connection for resistor to set clock frequency Negative supply voltage Input for photoamplifier timer mode reference; can also disable timer mode Enables push-to-test mode and diagnostic test/calibration mode; starts timer mode, if enabled
Package LW
C1 1 C2 2 DETECT 3 STROBE 4 VDD 5 IRED 6 I/O 7 HORN1 8 16 TEST 15 HUSH 14 VSS 13 TIMING RES 12 OSC CAP 11 LED 10 FEEDBACK 9 HORN2
Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A5366
Photoelectric Smoke Detector with Interconnect and Timer
Functional Block Diagram
I/O +Supply 9V VDD Band-gap Reference VDD FEEDBACK HORN2
+ _
Low Battery
HORN1
Logic DETECT Photoamp + _
LED
VDD
C1 Power-On Reset C2 TIMING RES OSC CAP VSS VDD
STROBE VDD IRED
Oscillator and Timing
-Supply
HUSH
TEST
Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A5366
Photoelectric Smoke Detector with Interconnect and Timer
Symbol VDD Average in standby mode, configured per typical application Test Conditions Test Pin 5 5 5 5 7 VDD - 12 12 12 9 9 9 9 9 9 9 9 12 12 12 12 12 9 9 12 6.5 6.5 6.5 6.5 12 9 - - 12 9 Min. 6.0 - - - - - - - 3.2 6.3 8.5 1.6 - - - - - 0.25 20 - - - - 5.5 VDD - 0.1 VDD - 5.25 - - - 2.85 Typ.2 - - - - - - - - - - - - - - - - - - - - - - 0.5 - - - -60 0.01 - 3.1 Max. 12 9 2.0 3.0 1.5 2.7 7.0 0.5 - - - - 100 100 -100 -100 -1.0 10 80 140 0.6 1.0 - - - VDD - 4.75 - - 0.1 3.35 Units V A mA mA V V V V V V V V nA nA nA nA A A A A V V V V V V dB %/C V V
DC ELECTRICAL CHARACTERISTICS at TA = -25C to 75C1. VSS = 0 V, in typical application (unless otherwise noted)
Characteristic Supply Voltage Range
Operating Supply Current
IDD
During STROBE on, IRED off, configured per typical application During STROBE on, IRED on, configured per typical application
Low-Level Input Voltage
VIL
10 16 15 7 10 16 15 VIN = VDD, STROBE active, OSC CAP = VDD VIN = VDD VIN = VST, STROBE active, OSC CAP = VDD 1, 2 3, 10, 12 1, 2, 3 10, 12 15, 16 16, 15 7 7 11 8, 9 13 8, 9 4 4 4 4 6 6
High-Level Input Voltage
VIH
Input Leakage High
IIH
Input Leakage Low
IIL
VIN = VSS VIN = VDD
Input Pull-Down Current
IIN
No local smoke, VIN = VDD No local smoke, VIN = 17 V IO = 10 mA
Low-Level Output Voltage High-Level Output Voltage
VOL VOH
IO = 16 mA IO = 5 mA IO = -16 mA Inactive, IO = -1 A
Strobe Output Voltage
VST Active, IO = 100 to 500 A
Line Regulation Strobe Temperature Coefficient IRED Output Voltage
VST(VDD) ST VIRED
Active, VDD = 6 to 12 V VDD = 6 to 12 V Inactive, IO = 1 A, TA = 25C Active, IO = -6 mA, TA = 25C
Continued on the next page...
Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A5366
Photoelectric Smoke Detector with Interconnect and Timer
DC ELECTRICAL CHARACTERISTICS (continued) at TA = -25C to 75C1, VSS = 0 V, in typical application (unless otherwise noted)
Characteristic Line Regulation IRED Temperature Coefficient High-Level Output Current OFF Leakage Current High OFF Leakage Current Low Low-Battery Alarm Threshold Common Mode Voltage Smoke Comparator Reference Voltage
1Limits 2Typical
Symbol VIRED(VDD) IRED IOH IOZ IOZ VDD(th) VIC VREF
Test Conditions Active, VDD = 6 to 12 V VDD = 6 to 12 V VDD = Alarm, I/O active,VO = VDD - 2 V VO = VDD VO = VSS
Test Pin 6 6 7 11, 13 11, 13 5
VDD - 9 12 12 - -
Min. - - -4.0 - - 6.9 VDD -4 VDD - 3.7
Typ.2 -35 0.40 - - - 7.2 - -
Max. - - - 1.0 -1.0 7.5 VDD -2 VDD - 3.3
Units dB %/C mA A A V V V
Any alarm condition Any alarm condition
1, 2, 3 Internal
over the operating temperature range are based on characterization data. Characteristics are production tested at 25C only. values are at 25C and are given for circuit design information only.
AC ELECTRICAL CHARACTERISTICS at TA = -25C to 75C1. VSS = 0 V, in typical application (unless otherwise noted)
Characteristic Oscillator Period Symbol tosc tled1 tled3 LED Pulse Period tled4 tled6 tled7 LED Pulse Width tw(led) tst1 tst2 tst3 STROBE Pulse Period tst4 tst5 tst6 STROBE Pulse Width tw(st) No local or remote smoke After 1 of 3 valid samples After 2 of 3 valid samples and during local alarm Remote smoke only Chamber test or low battery test, no local alarm Pushbutton test, induced alarm No local or remote smoke Local smoke Remote smoke only Pushbutton test, induced alarm Timer mode, no alarm Test Conditions Test Pin 12 11 11 11 11 11 11 4 4 4 4 4 4 4 VDD 9 9 9 9 9 9 9 9 9 9 9 9 9 9 Min. 9.4 39 0.45 - 0.45 9.67 9.5 9.6 1.8 0.8 7.2 38.9 225 9.5 Typ.2 10.5 - 0.50 No LED Pulses 0.50 10.75 - - 2.0 1.0 8.0 - 252 - Max. 11.5 48 0.55 - 0.55 11.83 11.5 11.9 2.2 1.1 8.9 47.1 278 11.5 Units ms s s s s s ms s s s s s ms ms
Continued on the next page...
Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A5366
Photoelectric Smoke Detector with Interconnect and Timer
AC ELECTRICAL CHARACTERISTICS (continued) at TA = -25C to 75C1, VSS = 0 V, in typical application (unless otherwise noted)
Characteristic Symbol tired1 tired2 IRED Pulse Period tired3 tired4 tired5 tired6 IRED Pulse Width IRED Rise Time IRED Fall Time I/O to Active Delay I/O Charge Dump Duration Rising Edge on I/O to Alarm Horn Warning Pulse Period Horn Warning Pulse Width Horn On-Time tw(ired) tr(ired) tf(ired) td(io) tdump tr(io) thorn tw(horn) ton(horn) toff1(horn) Horn Off-Time toff2(horn)
1Limits 2Typical
Test Conditions No local or remote smoke After 1 of 3 valid samples After 2 of 3 valid samples and during local alarm Remote smoke only Chamber test, no local alarm Pushbutton test, induced alarm 10% to 90% 90% to 10% Local alarm End of local alarm or test No local alarm Low battery or degraded chamber sensitivity Low battery or degraded chamber sensitivity Local or remote alarm Local or remote alarm (see Timing Diagrams section) Local or remote alarm (see Timing Diagrams section)
Test Pin 6 6 6 6 6 6 6 6 6 7 7 7 8, 9 8, 9 8, 9 8, 9 8, 9
VDD 9 9 9 9 9 9 9
Min. 9.6 1.8 0.8 7.2 38.9 225 94 - -
Typ.2 - 2.0 1.0 8.0 - 252 - - - 0 1.0 - - - 500 500 1500
Max. 11.9 2.2 1.1 8.9 47.1 278 116 30 200 - 1.1 128 x tOSC 47.1 11.5 550 550 1650
Units s s s s s ms s s s s s s s ms ms ms ms
9 9 9 9 9 9 9 9
- 0.9 - 38.9 9.5 450 450 1350
over the operating temperature range are based on characterization data. Characteristics are production tested at 25C only. values are at 25C and are given for circuit design information only.
Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A5366
Photoelectric Smoke Detector with Interconnect and Timer
Pin and Circuit Description
(In Typical Application)
C1 Pin A capacitor connected to this pin determines the gain, Ae, of the photoamplifier during the push-to-test mode and during the chamber monitor test. A typical capacitor value for this highgain (supervisory) mode is 0.047 F, but it should be selected based on the photochamber background reflections reaching the detector and the desired level of sensitivity. Ae = 1 + (C1 / 10), where C1 is in pF. Ae should not exceed 10,000 and thus C1 should not exceed 0.1 F. Coupling of other signals to the C1, C2, and DETECT inputs must be minimized. C2 Pin A capacitor connected to this pin determines the gain, Ae, of the photoamplifier during standby. A typical capacitor value for this low-gain mode is 4700 pF, but it should be selected based on a specific photochamber and the desired level of sensitivity to smoke. Ae = 1 + (C2 / 10), where C2 is in pF. Ae should not exceed 10,000 and thus C2 should not exceed 0.1 F. This gain increases by a nominal 10% after a local alarm is detected (three consecutive detections). A resistor must be installed in series with the C2 capacitor. DETECT Pin This is the input to the photoamplifier and is connected to the cathode of the photodiode. The photodiode is operated at zero bias and should have low dark leakage current and low capacitance. A shunt resistor must be installed in parallel with the photodiode. STROBE Pin This output provides a strobed, regulated voltage of VDD - 5 V. The minus side of all internal and external photoamplifier circuitry is referenced to this pin. VDD Pin This pin is connected to the positive supply potential and can range from 6 to 12 V with respect to VSS. IRED Pin This output provides a pulsed base current for the external NPN transistor, which drives the IR emitter. Its beta should be greater than 100. To minimize noise impact, the IRED output is not active when the horn and visible LED outputs are active. I/O Pin A connection at this pin allows multiple smoke detectors to be interconnected. If any single unit detects smoke, its I/O pin is
driven high, and all connected units will sound their associated horns. As an input, this pin is sampled every 128 clock cycles (nominally 1.34 s) during standby. The LED is suppressed when an alarm is signaled from an interconnected unit, and any localalarm condition causes this pin to be ignored as an input. An internal NMOS device acts as a charge dump to aid in applications involving a large (distributed) capacitance, and is activated at the end of a local or test alarm. This pin has an on-chip pulldown device and must be left unconnected if not used. In the application, there should be a series current-limiting resistor to other smoke alarms. HORN1, HORN2, and FEEDBACK Pins These three pins are used with a self-resonating piezoelectric transducer and horn-starting external passive components. The output HORN1 is connected to the piezo metal support electrode. The complementary output, HORN2, is connected to the ceramic electrode. The FEEDBACK input is connected to the feedback electrode. If the FEEDBACK pin is not used, it must be connected to VSS. LED Pin This open-drain NMOS output is used to directly drive a visible LED. The load for the low-battery test is applied to this output. If an LED is not used, it should be replaced with an equivalent resistor (typically 500 to 1000 ) such that the battery loading remains about 10 mA. The low-battery test does not occur coincident with any other test or alarm signal. The LED also indicates detector status as follows (with component values as in the typical application, all times nominal):
Condition Standby Local Smoke Remote Alarm Test Mode Timer Mode Pulse Occurrence Every 43 s Every 0.5 s No pulses Every 0.5 s Every 10 s
Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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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 internal clock low time. With component values shown, this nominal time is 10.4 ms and essentially the oscillator period. The internal clock low time can be calculated by: Tlow = 0.693 x ROSCCAP x COSCCAP . TIMING RES (Timing Resistor) Pin A resistor between this pin and OSC CAP is part of the two-terminal oscillator and sets the internal clock high time, which is also the IRED pulse width. With component values shown, this time is nominally 105 s. The internal clock high time can be calculated by: Thigh = 0.693 x RTIMINGRES x COSCCAP . VSS Pin This pin is connected to the negative supply potential (usually ground). HUSH Pin This input pin has an internal pull-down device and serves two purposes in standby mode. It serves to enable/disable entering the internal 10-minute (nominal) "hush" timer mode, and also as the reference for the smoke comparator during timer mode. When the voltage on this pin is greater than 1.5 V, entering timer mode is enabled, and a high-to-low transition on TEST resets and starts timer mode. If use of timer mode is not desired, this pin can be connected to VSS or left open, and a voltage of less than 0.5 V on the pin will disable timer mode. During timer mode, the smoke comparator reference is established by a resistive divider (Rx1 and Rx2) between the VDD and STROBE pins and allows the detector to operate with reduced sensitivity during timer mode. This allows the user to hush alarms caused by nuisance smoke or steam (such as from cooking). When not in timer mode, the smoke comparator reference is set internally to approximately VDD - 3.5 V. TEST Pin This pin has an internal pull-down device and is used to manually invoke two test modes and timer mode. Push-to-Test mode is initiated by a voltage greater than approximately VDD - 0.5 V on this pin (usually the depression of a normally-open pushbutton switch to VDD). After one oscillator cycle, the amplifier gain is increased by internal selection of C1 so that background reflections in the smoke chamber can be used to simulate a smoke condition, and IRED pulses every 252 ms (nominal). After the third IRED pulse (three consecutive simulated smoke conditions), the successful test activates
Photoelectric Smoke Detector with Interconnect and Timer
the horn drivers and the I/O pin, and the LED blinks once every 0.5 s. If the test fails, the LED will not blink, the horn will not sound, and the I/O pin will remain low. When the pushbutton is released, the input returns to VSS due to the internal pull down. After one oscillator cycle, the amplifier gain returns to normal, and after three additional IRED pulses (less than one second), the device exits this mode and returns to standby. This high-to-low transition on TEST also resets and starts the 10-minute (nominal) "hush" timer mode, if the mode is enabled via the HUSH pin. Diagnostic Test/Calibration Mode is available to facilitate calibration and test of the IC and the assembled detector. It is initiated by pulling TEST below VSS by continuously drawing 400 A from the pin for at least one clock cycle on OSC CAP. The current should not exceed 800 A and under these conditions, TEST pin voltage will clamp at approximately one diode drop below VSS. One option is to connect TEST to a -5 V supply through a 12 k resistor. In this mode, certain device pins are reconfigured as described in table 1. The IRED pulse rate is
Table 1. Alternate Pin Configuration During Diagnostic Test/Calibration Mode Pin Name
I/O
Alternate Configuration
Disabled as an output. A logic high on this pin places the photoamplifier output on pin C1 or C2 as determined by the HUSH pin. The amplifier output appears as pulses. If the I/O pin is high, this pin controls the amplifier gain capacitor. If this pin is low, normal gain is selected and the amplifier output is on pin C1. If this pin is high, supervisory gain is selected and the amplifier output is on pin C2. If the I/O pin is high and the HUSH pin is low (normal gain), taking this pin to a high logic level increases the amplifier gain by 10% (hysteresis). This pin may be driven by an external clock source. Driving this pin low and high drives the internal clock low and high. The external RC network may remain intact. This pin is reconfigured as the smoke integrator output. Three consecutive smoke detections will cause this pin to go high and three consecutive no-smoke detections cause this pin to go low. This pin becomes a low-battery indicator. The open-drain NMOS output is normally off. If VDD falls below the lowbattery threshold, the output turns on.
HUSH
FEEDBACK
OSC CAP
HORN1
LED
Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A5366
Photoelectric Smoke Detector with Interconnect and Timer
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 to VSS, for at least one OSC CAP cycle. Alarm Indications Alarm conditions include: local smoke detection, a remote alarm, low battery, or degraded chamber sensitivity. These are indicated by a combination of horn and LED signals, which continue until the alarm condition is resolved. A local alarm always overrides a remote alarm, and a local or remote alarm will inhibit warning signals for low battery or degraded chamber. During a local or a remote alarm condition, the horn output is a continuous modulated tone (temporal horn pattern), nominally: 0.5 s on, 0.5 s off, 0.5 s on, 0.5 s off, 0.5 s on, and 1.5 s off. The visible LED distinguishes a local alarm from a remote alarm. During a local alarm, the LED blinks every 0.5 s (nominally), but during a remote alarm, the LED is disabled and does not blink.
The degraded-chamber test occurs periodically (nominally every 43 s). During this test, the gain of the photoamplifier is switched to the high (supervisory) level, set by C1. The device expects that the photodiode will receive enough reflected background light in the chamber to cause an alarm condition. If a faulty, dirty, or obstructed chamber prevents this for two consecutive tests, the device signals degraded chamber with one short (nominally 10 ms) horn chirp every 43 s, essentially halfway between LED flashes. The condition is resolved when the chamber is either cleared or cleaned. The low-battery test also occurs periodically (also nominally every 43 s, but offset from the degraded-chamber test). During this test, the load of the LED is applied to the battery, and a resistive divider off VDD is compared to an internal band-gap reference. If VDD is below the threshold, the device signals low battery with one short (nominally 10 ms) horn chirp every 43 s, occurring almost simultaneously with the visible LED flash. The condition is resolved when the battery is replaced.
Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A5366
Photoelectric Smoke Detector with Interconnect and Timer
Timing Diagrams
(Not to Scale)
Standby Mode
OSC CAP Pin Internal Clock
tosc
Test event
90% 50% 10%
tr(ired)
tf(ired)
tw(ired)
Photo Sample Low-Battery Test Chamber Test
tw(st)
tst1, tired1 tled1, tst5 tst5, tired5
STROBE Pin IRED Pin LED Pin
tw(led)
LED on
LED off (High-Z)
Low Battery Condition
VDD Pin Low-Battery Test Failed "test period" Horn Enable
tw(horn) thorn
(Low battery)
LED Pin
LED on
LED off (High-Z)
Chirps occur at the end of a failed "test period," and are nearly coincident with LED flashes
Degraded Chamber Condition
Chamber Sensitivity Chamber Test
thorn
(Degraded chamber)
Horn Enable
tw(horn)
LED Pin
LED on
LED off (High-Z)
Chirps occur after 2 consecutive failed tests, and are offset from LED flashes and from chirps that indicate failure of low-battery tests
Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A5366
Local Smoke Detection Alarm Condition
1st strobe with smoke 3rd strobe with smoke
Photoelectric Smoke Detector with Interconnect and Timer
3rd strobe without smoke
IRED Pin
tst2,t ired2 tst3, tired3 tst3, tired3 tw(st)
STROBE Pin
tw(led) tled3
LED Pin LED on LED off (High-Z) Horn Enable I/O Pin (Output)
ton(horn) toff2(horn) toff1(horn)
tdump
I/O Charge Dump
Remote Alarm Condition
tw(st) tst4, tired4
STROBE Pin LED Pin LED off (High-Z)
ton(horn) toff2(horn)
toff1(horn)
Horn Enable
tr(io)
I/O Pin
(Input)
Test Alarm Mode
tw(st) tst6, tired6
STROBE Pin
tw(led) tled6
LED Pin LED on LED off (High-Z) TEST Pin
ton(horn) toff2(horn) toff1(horn)
Horn Enable
tdump
I/O Pin
(Output)
I/O Charge Dump
Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A5366
Photoelectric Smoke Detector with Interconnect and Timer
Package A, 16-Pin DIP
.750 [19.05] 16 .010 [0.25] .250 [6.35] A 1 2 .430 [10.92] .300 [7.62]
.210 [5.33] MAX .130 [3.30] .005 [1.27] .060 [1.52] .018 [0.46] .100 [2.54]
All dimensions nominal, not for tooling use (reference JEDEC MS-001 BB) Dimensions in inches, metric dimensions (mm) in brackets, for reference only Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown A Terminal #1 mark area
Package LW, 16-Pin SOIC
10.30 4 16 0.27
All dimensions nominal, not for tooling use Dimensions in millimeters (reference JEDEC MS-013 AA) Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown A Terminal #1 mark area 1
7.50 A
10.30
0.84
2 0.25
16X 0.10 C 0.41 1.27 0.20
SEATING PLANE 2.65 MAX
C
SEATING PLANE GAUGE PLANE
Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A5366
Photoelectric Smoke Detector with Interconnect and Timer
Allegro MicroSystems offers an industry-leading range of ionization and photoelectric smoke detector ICs. For a current listing, please visit our website at:
www.allegromicro.com
Copyright (c)2001-2007, Allegro MicroSystems, Inc. The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. For the latest version of this document, visit our website: www.allegromicro.com
Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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