R&E International A Subsidiary of Microchip Technology Inc. RE46C121 CMOS Ionization Smoke Detector ASIC with Interconnect Product Specification Features General Description Guard Outputs for Ion Detector Input The RE46C121 is low power CMOS ionization type +/-0.75pA Detect Input Current smoke detector IC. With few external components this Internal Reverse Battery Protection circuit will provide all the required features for an ionization type smoke detector. Internal Low Battery Detection Low Quiescent Current Consumption (<6.5uA) An internal oscillator strobes power to the smoke Available in 16L PDIP or 16L N SOIC detection circuitry for 10.5mS every 1.66 seconds to ESD Protection on all Pins keep standby current to a minimum. A check for a low Interconnect up to 40 Detectors battery condition is performed every 40 seconds when Compatible with MC145018 in standby. The temporal horn pattern supports the UL Recognized per File S24036 NFPA 72 emergency evacuation signal. Available in Standard Packaging or RoHS Complaint Pb Free Packaging An interconnect pin allows multiple detectors to be connected such that when one unit alarms all units will Pin Configuration sound. Although this device was designed for smoke detection DETCOMP GUARD2 1 16 utilizing an ionization chamber it can be used in a variety of security applications. IO DETECT 2 15 LBADJ GUARD1 The RE46C120 is recognized by Underwriters 3 14 Laboratories for use in smoke detectors that comply STROBE VSEN 4 13 with specification UL217 and UL268. OSCAP LED 5 12 HS VDD 6 11 RBIAS HB 7 10 VSS FEED 8 9 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL VALUE UNITS Supply Voltage V 15 V DD Input Voltage Range Except FEED, IO V -.3 to V+.3 V in dd FEED Input Voltage Range V -10 to +22 V infd IO Input Voltage Range V -.3 to 17 V io1 Reverse Battery Time T 5 S RB Input Current except FEED I 10 mA in Operating Temperature T -10 to 60 C A Storage Temperature T -55 to 125 C STG Maximum Junction Temperature T 150 C J 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 2009 Microchip Technology Inc. DS22158B-page 1 RE46C121 CMOS Ionization Smoke Detector ASIC with Interconnect R&E International Product Specification A Subsidiary of Microchip Technology Inc. DC Electrical Characteristics at TA = 25C, VDD=9V, OSCAP=.1uF, RBIAS=8.2M , VSS=0V (unless otherwise noted) Limits Test Parameter Symbol Pin Test Conditions Min Typ Max Units Supply Voltage V 6 Operating 6 12 V DD Supply Current RBIAS=8.2M , OSCAP=.1uF I 6 4.5 6.5 uA DD1 RBIAS=8.2M , OSCAP=.1uF Vdd=12V I 6 9 uA DD2 Input Voltage High V 8 6.2 4.5 V IH1 V 2 No Local Alarm, IO as an Input 3 V IH2 Input Voltage Low V 8 4.5 2.7 V IL1 V 2 No Local Alarm, IO as an Input 1 V IL2 Input Leakage Low IL 15 VDD=9V, DETECT=VSS, 0-40% RH -0.75 pA DET1 VDD=9V, DETECT=VSS, 85% RH IL 15 -1.50 pA DET2 Note 1 IL 8 FEED=-10V -50 uA FD Input Leakage High VDD=9V, DETECT=VDD, 0-40% RH IH 15 0.75 pA DET1 VDD=9V, DETECT=VDD, 85% RH IH 15 1.50 pA DET2 Note 1 IH 8 FEED=22V 50 uA FD I 2 No Alarm, Vio=Vdd-2V 25 100 uA IOL1 No Alarm, Vio=17V I 2 150 uA IOL2 Output Off Leakage High Output Off I 4,5 1 uA IOHZ Output Voltage High V 10,11 IOH=-16mA, VDD=7.2V 6.3 V OH1 V 1 IOH=-30ua 8.5 V OH2 Output Voltage Low IOL=16mA, VDD=7.2V V 10,11 .9 V OL1 IOL=30ua V 1,4 .5 V OL2 V 5 IOL=10mA, VDD=7.2V 3 V OL3 Output Current I 2 Alarm, Vio=Vdd-2V or Vio=0V -4 -16 mA IOH1 At Conclusion of Local Alarm or Test, I 2 5 mA IODMP Vio=1V Low Battery Voltage T =-10 to 60C, Note 3 V 6 A 7.2 7.5 7.8 V LB Internal Sensitivity Set Voltage V 13 47 50 53 %V SET1 DD V 3 65.5 %V SET2 DD Offset Voltage VG 14,15 Guard Amplifier -50 50 mV OS1 Guard Amplifier VG 15,16 -50 50 mV OS2 Smoke Comparator VG 13,15 -50 50 mV OS3 Common Mode Voltage V 14,15 Guard Amplifier, Note 2 2 V -.5 V DD CM1 V 13,15 Smoke Comparator, Note 2 .5 V -2 V DD CM2 Output Impedance Guard Amplifier Outputs, Note 2 Z 14,16 10 k OUT Hysteresis No Alarm to Alarm Condition V 13 90 130 170 mV HYS Note 1: Sample test only Note 2: Not 100% production tested Note 3: Production test at room with temperature guardbanded limits. 2009 Microchip Technology Inc. DS22158B-page 2