RE46C166SW16TF

Sensor And Detector Interfaces Overview

The RE46C166SW16TF is a CMOS photoelectric smoke detector ASIC manufactured by Microchip Technology. It operates on a supply voltage range of 6V to 12V, with typical standby current consumption of 5.5 µA at 9V and maximum quiescent current below 8 µA. The device features an internal oscillator with a nominal period of 10 ms and supports interconnection of up to 40 detectors. It provides temporal horn alarm patterns compliant with NFPA 72 standards and includes an alarm memory feature for visual indication of prior alarms. The component is housed in a 16-SOIC package and functions within an operating temperature range of -25°C to +75°C.

Sensor And Detector Interfaces Feature Summary

• Supports temporal horn pattern output for emergency evacuation signaling
• Includes alarm memory latch to indicate previous local alarm conditions
• Features interconnect capability for linking multiple detectors in a single system
• Provides internal low battery detection and photo chamber integrity testing

Sensor And Detector Interfaces Applications

• Photoelectric smoke detectors complying with UL217 specifications
• Smoke detection systems requiring compliance with UL268 standards
• Multi-unit interconnected fire alarm networks

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix 'S16' or 'SW16' against official datasheets to confirm package dimensions and pinout compatibility. Confirm RoHS3 compliance status through manufacturer documentation before integration into regulated assemblies.

Sensor And Detector Interfaces Selection Notes

Select this model when a temporal horn alarm pattern is required rather than a continuous tone. Ensure the application utilizes a 9V power supply architecture compatible with the specified 6V to 12V operating range. Verify that the 16-SOIC surface mount package fits the target PCB layout constraints.

Sensor And Detector Interfaces Part Context

This component belongs to the RE46C165/6/7/8 family of low-power CMOS smoke detector ICs. While sharing core detection circuitry, the RE46C166 variant specifically implements the temporal horn alarm timing sequence. It differs from the RE46C165 by its alarm pattern and from the RE46C167/8 by its sensitivity control timer duration.

Sensor And Detector Interfaces Replacement Considerations

RE46C165SW16TF serves as a direct functional substitute if a continuous horn tone is acceptable instead of the temporal pattern.