RE46C167SW16F

Sensor And Detector Interfaces Overview

The RE46C167SW16F is a CMOS photoelectric smoke detector ASIC designed for standalone or interconnected systems. It operates on a 5V to 12V supply with typical standby currents of 4 µA at 9V and 5.5 µA at 12V. The device features a continuous tone horn output, an interconnect pin for up to 40 detectors, and alarm memory functionality. It includes internal low battery detection and chamber test capabilities. The IC supports a 1.2-minute timer mode and provides over 2000V ESD protection across all pins.

Sensor And Detector Interfaces Feature Summary

• Supports continuous tone horn patterns compliant with NFPA 72 emergency evacuation signals.
• Includes an alarm memory feature that visually indicates previous local alarm conditions via LED pulses.
• Features an interconnect capability allowing multiple detectors to be linked for synchronized alarms.
• Integrates internal low battery detection and periodic photo chamber integrity testing.

Sensor And Detector Interfaces Applications

• Standalone photoelectric smoke detectors
• Interconnected residential fire alarm systems
• Battery-powered smoke sensing units

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix 'SW16F' against the manufacturer's current documentation to confirm package type and lead-free status. Confirm availability as product lifecycles may change. Ensure compliance with UL217 and UL268 standards for intended deployment.

Sensor And Detector Interfaces Selection Notes

Select this model when a continuous tone output is required instead of a temporal pattern. The RE46C167 variant offers a shorter 1.2-minute timer duration compared to the 9-minute duration found in the RE46C165/6 series. Verify compatibility with external piezoelectric transducers connected to the HB and HS pins.

Sensor And Detector Interfaces Part Context

This component belongs to the RE46C165/6/7/8 family of low-power CMOS photoelectric smoke detector ICs. While sharing core architecture, the RE46C167 differs from siblings like the RE46C165 by utilizing a continuous horn pattern and a reduced 1.2-minute timer sensitivity window.

Sensor And Detector Interfaces Replacement Considerations

RE46C168SW16F

Sensor And Detector Interfaces FAQ

What is the difference between the RE46C167 and RE46C165 horn outputs?

The RE46C167 produces a continuous tone horn pattern, whereas the RE46C165 generates a temporal horn pattern.

How does the alarm memory function operate?

After a local alarm, the unit flashes its LED three times every 43 seconds for up to 24 hours to indicate a past alarm event. This can also be verified using the push-to-test button.

What is the maximum number of detectors supported by the interconnect feature?

The interconnect pin allows for the connection of up to 40 detectors within a single system.