Microchip Technology, Inc. Sensor and Detector Interfaces RE46C145S16F

The RE46C145S16F is a low-power CMOS photoelectric smoke detector IC designed for efficient smoke detection with minimal external components. It features an internal power-on reset, low quiescent current consumption, and ESD protection on all pins. The device supports interconnectivity for up to 40 detectors, allowing simultaneous alarm activation across multiple units. A built-in 10-minute timer enables reduced sensitivity control, while the temporal horn pattern complies with NFPA 72 emergency evacuation signals. This IC incorporates a gain-selectable photo amplifier compatible with an infrared emitter/detector pair and includes an internal oscillator that minimizes standby current by strobing power to the detection circuitry every 10 seconds. Diagnostic capabilities are provided through an alternate mode that allows calibration of the photo chamber. The RE46C145S16F is UL recognized, ensuring compliance with safety standards for smoke detectors. It is available in a 16-lead SOIC package, making it suitable for various applications in smoke detection systems.