RE46C120 Datasheet | R - E International

Description The RE46C120 is low power CMOS ionization type smoke detector IC. With a few external ponents 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 10.5m S 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 ply with Underwriters Laboratory Specification UL217 and UL268. Features - - - - - - - - - - Guard Outputs for Ion Detector Input +/-0.75p A Detect Input Current Internal Reverse Battery Protection Internal Low Battery Detection Pin Selectable Horn Pattern Low Quiescent Current Consumption (<6.5u A) Available in 16L PDIP or 16L N SOIC ESD Protection on all Pins patible with MC145017, MC14467 Available in Standard Packaging or Ro HS plaint Pb Free Packaging Pin Configuration DETP N/C LBADJ TONE LED VDD RBIAS FEED 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 GUARD2 DETECT GUARD1 VSEN OSCAP HS HB VSS ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Input Voltage Range Except FEED FEED Input Voltage Range Reverse Battery Time Input Current except FEED Operating Temperature Storage Temperature Maximum Junction Temperature SYMBOL VDD Vin Vinfd TRB Iin TA TSTG TJ VALUE 15 -.3 to Vdd +.3 -10 to +22 5 10 -10 to 60 -55 to 125 150 UNITS V V V S MA °C °C °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...