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RE46C121 Datasheet(PDF) 1 Page - Microchip Technology |
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RE46C121 Datasheet(HTML) 1 Page - Microchip Technology |
1 / 7 page R&E International A Subsidiary of Microchip Technology Inc. RE46C120 CMOS Ionization Smoke Detector ASIC Product Specification © 2009 Microchip Technology Inc. DS22157A-page 1 General Description The RE46C120 is a low power CMOS ionization type smoke detector IC. With a few external components this circuit will provide all the required features for an ionization type smoke detector. An internal oscillator strobes power to the smoke detection circuitry for 10.5mS every 1.66 seconds to keep standby current to a minimum. A check for a low battery condition is performed every 40 seconds when in standby. The TONE input allows for selection of a temporal pattern or a 2/3 duty cycle continuous tone. The temporal horn pattern supports the NFPA 72 emergency evacuation signal. Although this device was designed for smoke detection utilizing an ionization chamber it could be used in a variety of security applications. Utilizing low power CMOS technology the RE46C120 was designed for use in smoke detectors that comply with Underwriters Laboratory Specification UL217 and UL268. Features • Guard Outputs for Ion Detector Input • +/-0.75pA Detect Input Current • Internal Reverse Battery Protection • Internal Low Battery Detection • Pin Selectable Horn Pattern • Low Quiescent Current Consumption (<6.5uA) • 16L PDIP • ESD Protection on all Pins • Compatible with MC145017, MC14467 • Available in RoHS Compliant Pb Free Packaging Pin Configuration 16 DETCOMP GUARD2 1 2 DETECT N/C 15 3 GUARD1 LBADJ 14 4 VSEN TONE 13 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL VALUE UNITS Supply Voltage VDD 15 V Input Voltage Range Except FEED Vin -.3 to Vdd +.3 V FEED Input Voltage Range Vinfd -10 to +22 V Reverse Battery Time TRB 5 S Input Current except FEED Iin 10 MA Operating Temperature TA -10 to 60 °C Storage Temperature TSTG -55 to 125 °C Maximum Junction Temperature TJ 150 °C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and operation at these conditions for extended periods may affect device reliability. This product utilizes CMOS technology with static protection; however proper ESD prevention procedures should be used when handling this product. Damage can occur when exposed to extremely high static electrical charge 5 OSCAP 12 LED VDD RBIAS FEED 6 HS 11 7 HB 10 VSS 8 9 |
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