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RE46C166 Datasheet

Download or read online Microchip Technology RE46C166 CMOS Photoelectric Smoke Detector ASIC With Interconnect, Timer Mode And Alarm Memory pdf datasheet.



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CMOS Photoelectric Smoke Detector ASIC
with Interconnect, Timer Mode and Alarm Memory
Features
• Temporal Horn Pattern or Continuous Tone
• Alarm Memory
• Sensitivity Control Times:
- 9 minutes (RE46C165/6)
- 1.2 minutes (RE46C167/8)
• I/O Filter and Charge Dump
• Interconnect up to 40 Detectors
• Internal Power-on Reset
• >2000V ESD Protection (HBM) on All Pins
• Low Quiescent Current Consumption (<8 µA)
• Internal Low Battery Detection and Chamber Test
• RoHS Compliant Lead-Free Packaging
 2010 Microchip Technology Inc.
RE46C165/6/7/8
Description
The RE46C165/6/7/8 devices are low-power, CMOS
photoelectric type, smoke detector ICs. With minimal
external components, these circuits will provide all the
required features for a photoelectric type smoke
detector.
Each design incorporates a gain selectable photo
amplifier for use with an infrared emitter/detector pair.
An internal oscillator strobes power to the smoke
detection circuitry for 100 µs every 10 seconds to keep
standby current to a minimum. If smoke is sensed, the
detection rate is increased to verify an alarm condition.
A high gain mode is available for push button chamber
testing.
A check for a low battery condition and chamber
integrity is performed every 43 seconds when in
standby. The temporal horn pattern supports the
NFPA 72 emergency evacuation signal.
An interconnect pin allows multiple detectors to be
connected so when one unit alarms, all units will sound.
A charge dump feature will quickly discharge the
interconnect line when exiting a local alarm. The
interconnect input is also digitally filtered.
An internal timer allows for single button, push-to-test
to be used for a reduced sensitivity mode.
An alarm memory feature allows the user to determine
if the unit has previously entered a local alarm
condition.
Utilizing
low-power
RE46C165/6/7/8 was designed for use in smoke
detectors that comply with Underwriters Laboratory
Specification UL217 and UL268.
CMOS
technology,
the
DS22251A-page 1

Summary of Contents

Page 1

... ESD Protection (HBM) on All Pins Low Quiescent Current Consumption (<8 µA) Internal Low Battery Detection and Chamber Test RoHS Compliant Lead-Free Packaging 2010 Microchip Technology Inc. RE46C165/6/7/8 Description The RE46C165/6/7/8 devices are low-power, CMOS photoelectric type, smoke detector ICs. With minimal ...

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... DD V – STROBE (4) Photoamp DETECT ( (1) C2 (2) TEST (16) DS22251A-page 2 TEST VSEN V SS ROSC COSC LED FEED HORNS - - Logic and Timing Reference Bias and Power Reset Oscillator IO (7) FEED (10) HS (9) HB (8) LED (11) IRED (6) ROSC (13) COSC (12) 2010 Microchip Technology Inc. ...

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... Note 1: C3 should be located as close as possible to the device power pins typical for an alkaline battery. This capacitance should be increased to 4.7 µF or greater for a carbon battery. 3: R10, R11 and C6 are typical values and may be adjusted to maximize sound pressure. 2010 Microchip Technology Inc. RE46C165/6/7/8 Push-to-Test 1 ...

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... RE46C165/6/7/8 NOTES: DS22251A-page 4 2010 Microchip Technology Inc. ...

Page 5

... Not production tested. 3: Production test at room temperature with guard banded limits. 2010 Microchip Technology Inc. Notice: Stresses above those listed under Maximum ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the ...

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... Local smoke, Push-to-Test or Chamber Test, Note 2 V Internal Reference, Note 2 %/°C STROBE output voltage 12V DD %/°C IRED output voltage 12V DD dB STROBE output (vs 12V DD dB IRED output voltage 12V DD 2010 Microchip Technology Inc. ...

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... See timing diagram for Horn Temporal Pattern in 3: See timing diagram for Horn Continuous Pattern in 4: During Timer mode, the LED Period is 10.5 seconds. The LED period will return to 43 seconds at the conclusion of the Timer mode. 2010 Microchip Technology Inc. RE46C165/6/7/8 0V. SS Min Typ ...

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... RE46C165/7 only Local or remote alarm, Note 2 RE46C166/8 only Local or remote alarm, Note 3 RE46C165/7 only Local or remote alarm, Note 2 RE46C166/8 only Local or remote alarm, Note 3 RE46C165/7 only Local or remote alarm, Note 2 RE46C165/7 only Local or remote alarm, Note 2 RE46C166/8 only Local or remote alarm, Note 3 ...

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... Local alarm start to I/O active RE46C165/7 only No local alarm, I/O active to alarm RE46C166/8 only No local alarm, I/O active to alarm RE46C165/7 only At conclusion of local alarm or test RE46C166/8 only At conclusion of local alarm or test Maximum I/O pulse width filtered RE46C165/6 only No alarm condition RE46C167/8 only No alarm condition DS22251A-page 9 ...

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... Thermal Resistance, 16L-SOIC (300 mil) DS22251A-page 10 9V, Typical Application (unless otherwise noted), DD Sym Min Typ Max Units T -25 75 ° -25 75 ° -55 125 °C STG J 70 °C 86.1 °C 80 °C/W A Conditions 2010 Microchip Technology Inc. ...

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... Strobed Detection Negative Supply (STROBE) Regulated output voltage of V 5, which is active DD during a test for smoke. This output is the negative side of the photo amplifier reference circuitry. 2010 Microchip Technology Inc. RE46C165/6/7/8 Table 2-1. Function High Gain Capacitor Pin Normal Gain Capacitor Pin ...

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... Hush Timer Sensitivity Pin (VSEN) In Timer mode, this input pin can be used to set an external smoke comparator reference. 2.14 TEST Pin This input is used to invoke two test modes and the Timer mode. This input has an internal pull-down. DS22251A-page 12 2010 Microchip Technology Inc. ...

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... When the TEST input is deactivated (V cycle, the normal gain capacitor C2 is selected. The detection rate continues once every 330 ms for the RE46C166/8, and every 250 ms while the horn is not sounding for consecutive no smoke conditions are detected, the device returns to standby timing ...

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... In the diagnostic mode, some of the pin functions are redefined. Refer to Table 3-1 below for redefined pin functions in the diagnostic mode. In addition, in this mode STROBE is always enabled, and the IRED is pulsed at the clock rate nominal. , the Hush SS 2010 Microchip Technology Inc. ...

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... HON2 Horn Chamber Test and Warning is Offset from Low Battery Test and Warning by 21.3 Seconds. FIGURE 3-1: RE46C165/6/7/8 Timing Diagram Standby, Low Battery, Chamber Fail. 2010 Microchip Technology Inc. RE46C165/6/7/8 Function falls below the threshold, the NMOS turns on. DD Standby, No Alarm (not to Scale) ...

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... IO Dump active only in local alarm, inactive if external alarm FIGURE 3-2: RE46C165/6/7/8 Timing Diagram Local and Remote Alarm. DS22251A-page PER2 PER3 T PLED2 T T PER4 PER4 Local Alarm IODLY2 HON1 HOF1 HOF2 IODLY2 HON1 HOF1 T PER5 Remote/External Alarm No Alarm T IODMP No Alarm 2010 Microchip Technology Inc. ...

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... RE46C165/7 Timer Diagram Alarm Memory Mode. Alarm, No Low Battery Alarm Memory; No Alarm; No Low Battery LED T T PLED2 ON1 HB TEST FIGURE 3-5: RE46C166/8 Timer Diagram Alarm Memory Mode. 2010 Microchip Technology Inc. RE46C165/6/7/8 T TPER Alarm Memory After 24 Hour Timer T T OFLED PLED1 T ...

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... RE46C165/6/7/8 NOTES: DS22251A-page 18 2010 Microchip Technology Inc. ...

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... Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. 2010 Microchip Technology Inc. RE46C165/6/7/8 Example e RE46C165-V/P ...

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... RE46C165/6/7/8 /HDG 3ODVWLF 'XDO ,Q /LQH 3 ± 1RWH N NOTE 1RWHV DS22251A-page 20 PLO %RG >3', 2010 Microchip Technology Inc. ...

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... N NOTE 1RWHV 2010 Microchip Technology Inc. RE46C165/6/7/8 PP %RG >62,& α φ A2 β DS22251A-page 21 ...

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... RE46C165/6/7/8 Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS22251A-page 22 2010 Microchip Technology Inc. ...

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... D N NOTE 1RWHV 2010 Microchip Technology Inc. RE46C165/6/7/8 PP %RG >62,& φ α c β DS22251A-page 23 ...

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... RE46C165/6/7/8 /HDG 3ODVWLF 6PDOO 2XWOLQH 62 ± :LGH 1RWH DS22251A-page 24 PP %RG >62,&@ /DQG 3DWWHUQ 2010 Microchip Technology Inc. ...

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... APPENDIX A: REVISION HISTORY Revision A (May 2010) Original Release of this Document. 2010 Microchip Technology Inc. RE46C165/6/7/8 DS22251A-page 25 ...

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... RE46C165/6/7/8 NOTES: DS22251A-page 26 2010 Microchip Technology Inc. ...

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... Reel, SOIC only) RE46C165/7: CMOS Photoelectric Smoke Detector ASIC RE46C165/7T: CMOS Photoelectric Smoke Detector ASIC (Tape and Reel, SOIC only) RE46C166/8: CMOS Photoelectric Smoke Detector ASIC RE46C166/8T: CMOS Photoelectric Smoke Detector ASIC (Tape and Reel, SOIC only) RE46C165/6: CMOS Photoelectric Smoke Detector ASIC ...

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... RE46C165/6/7/8 NOTES: DS22251A-page 28 2010 Microchip Technology Inc. ...

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... PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, UniWinDriver, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2010, Microchip Technology Incorporated, Printed in the U ...

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... Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 2010 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris ...

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