Photoelectic Smoke Detector IC with I/O and Temporal Pattern Horn Driver

The CMOS MC145012 is an advanced smoke detector component containing sophisticated very--low--power analog and digital circuitry. The IC is used with an infrared photoelectric chamber. Detection is accomplished by sensing scattered light from minute smoke particles or other aerosols. When detection occurs, a pulsating alarm is sounded via on--chip push--pull drivers and an external piezoelectric transducer.

• Circuit is designed to operate in smoke detector systems that comply with UL217 and UL268 Specifications
• Operating Voltage Range: 6 to 12 V
• Operating Temperature Range: -- 10 to 60°C
• Average Supply Current: 8 µA
• I/O Pin Allows Units to be Interconnected for Common Signalling
• Power--On Reset Places IC in Standby Mode (Non--Alarm State)
• Electrostatic Discharge (ESD) and Latch Up Protection Circuitry on All Pins
• Chip Complexity: 2000 FETs, 12 NPNs, 16 Resistors, and 10 Capacitors
• Supports NFPA 72, ANSI S3.41, and ISO 8201 Audible Emergency Evacuation Signals
• Ideal for battery--powered applications