RE46C167SW16TF

Sensor And Detector Interfaces Overview

The RE46C167SW16TF is a CMOS photoelectric smoke detector ASIC from Microchip Technology, designed for UL217 and UL268 compliance. It operates on a 5V to 12V supply with typical standby current of 4 µA at 9V. The device features a temporal horn pattern output, alarm memory, and interconnect capability for up to 40 detectors. It includes internal low battery detection, chamber testing, and a hush timer mode with a sensitivity control time of 1.2 minutes. The IC provides over 2000V ESD protection and supports push-to-test functionality.

Sensor And Detector Interfaces Feature Summary

• Supports temporal horn pattern output compliant with NFPA 72 emergency evacuation signals
• Includes an alarm memory feature to visually identify units that previously entered a local alarm condition
• Features an interconnect pin allowing multiple detectors to be connected so all units sound when one alarms
• Provides internal low battery detection and chamber integrity checks performed every 43 seconds

Sensor And Detector Interfaces Applications

• Photoelectric type smoke detectors complying with Underwriters Laboratory Specification UL217
• Photoelectric type smoke detectors complying with Underwriters Laboratory Specification UL268
• Systems requiring interconnection of up to 40 detectors for synchronized alarming

Sensor And Detector Interfaces Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status and lead-free packaging details directly with the manufacturer or authorized distributors before finalizing procurement orders.

Sensor And Detector Interfaces Selection Notes

Select this model specifically for applications requiring a 1.2-minute hush timer sensitivity control period, distinguishing it from the 9-minute variants in the family. Ensure the design accommodates the temporal horn pattern output requirements and utilizes the interconnect capabilities if deploying multiple units in a single system.

Sensor And Detector Interfaces Part Context

This component belongs to the RE46C165/6/7/8 series of low-power CMOS photoelectric smoke detector ICs. These devices are engineered to provide complete detection logic with minimal external components, incorporating gain-selectable photo amplifiers and internal oscillators to maintain low standby current consumption while ensuring reliable smoke sensing performance.

Sensor And Detector Interfaces Replacement Considerations

RE46C165SW16TF, RE46C166SW16TF, RE46C168SW16TF