Microchip Technology, Inc. Sensor and Detector Interfaces RE46C167SW16TF

The RE46C167SW16TF is a low-power CMOS photoelectric smoke detector integrated circuit designed for use in smoke detection applications. It features a gain-selectable photo amplifier compatible with infrared emitter/detector pairs, ensuring effective smoke detection with minimal external components. The device operates with a low quiescent current consumption of less than 8 µA, making it suitable for battery-powered applications. Key functionalities include an internal timer for reduced sensitivity mode, alarm memory to indicate previous alarm conditions, and a temporal horn pattern for emergency signaling. The interconnect capability allows up to 40 detectors to be linked, ensuring simultaneous alarm activation across multiple units. Additionally, the RE46C167SW16TF includes features such as internal low battery detection, chamber testing, and over 2000V ESD protection on all pins. It is compliant with RoHS standards and designed to meet Underwriters Laboratory specifications UL217 and UL268, making it a reliable choice for smoke detection systems.