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MFG:MOT  Package Cooled:1998  D/C:DIP  

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Part Number: MC145018

 

MFG: MOT

Package Cooled: 1998

D/C: DIP

Description: The MC145018, when used with an ionization chamber and a small number of external components, will det...


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MC145018 General Description


The MC145018, when used with an ionization chamber and a small number of external components, will detect smoke. When smoke is sensed, an alarm is sounded via an external piezoelectric transducer and internal drivers. This circuit is designed to operate in smoke detector systems that comply with UL217 and UL268 specifications.

MC145018 Maximum Ratings

Rating Symbol Value Unit
DC Supply Voltage VDD -0.5 to +12 V
Input Voltage, All Inputs Except Pin 8 VIN -0.25 to VDD + 0.25 V
DC Current Drain per Input Pin, Except Pin 15 = 1 mA Iin 10 mA
DC Current Drain per Output Pin Iout 30 mA
Operating Temperature Range IDD -10 to + 60 °C
Storage Temperature Range Tstg 55 to +125 °C
Reverse Battery Time tRB 5.0 s

MC145018 Features

• Ionization Type with OnChip FET Input Comparator
• Piezoelectric Horn Driver
• Guard Outputs on Both Sides of Detect Input
• InputProtection Diodes on the Detect Input
• LowBattery Trip Point, Internally Set, can be Altered Via External Resistor
• Detect Threshold, Internally Set, can be Altered Via External Resistor
• Pulse Testing for Low Battery Uses LED for Battery Loading
• Comparator Output for Detect
• Internal Reverse Battery Protection
• Strobe Output for External Trim Resistors
• I/O Pin Allows Up to 40 Units to be Connected for Common Signaling
• Supports NFPA 72, ANSi 53.41, and ISO 8201 Audible Emergency Evacuation Signals
• PowerOn Reset Places IC in Standby Mode

MC145018 Connection Diagram

MC145018 Connection Diagram

MC145018 datasheet

MC145018
PDF/DataSheet Download

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