Low Power CMOS Photoelectric Smoke Detector IC

The MC146012 is an advanced smoke detector component containing sophisticated very-low power analog and digital circuitry. The IC, when used with an infrared photoelectric chamber and a small number of external components, will detect smoke by sensing scattered light from smoke particles. When detection occurs, a pulsating alarm is sounded via on-chip push-pull drivers and an external piezoelectric transducer.

Features
• Integrated Mute Function (IMF) to Temporarily Disable Horn
• Alarm Memory to Help Identify Alarming Unit
• Speed-Up Sampling Rate After First Detection of Smoke
• Double Sample for Degraded Chamber Sensitivity Monitor
• Digital Noise Filter on the I/O Pin
• Power-Up and Power-Down RESET
• Low-Battery Trip Point Set Externally
• Temporal Horn Pattern
• Operating Temperature: -10 to 75°C
• Operating Voltage Range: 6.0 to 12 V
• Average Supply Current: 6.5 µA