RE46C166S16TF

Sensor And Detector Interfaces Overview

The RE46C166S16TF is a CMOS photoelectric smoke detector ASIC manufactured by Microchip Technology. It operates on a supply voltage of 6V to 12V with typical standby current consumption of 5.5 µA at 9V and 8 µA at 12V. 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 test functionality, and an I/O filter. The IC is housed in a 16-SOIC package and supports an operating temperature range from -25°C to +75°C.

Sensor And Detector Interfaces Feature Summary

• Supports temporal horn patterns compliant with NFPA 72 emergency evacuation signals.
• Includes alarm memory feature to visually identify units that previously entered a local alarm condition.
• Provides interconnect capability allowing multiple detectors to be linked so all units sound upon activation.
• Features internal low battery detection and periodic photo chamber integrity testing.

Sensor And Detector Interfaces Applications

• Photoelectric smoke detectors requiring UL217 and UL268 compliance
• Multi-unit interconnected fire alarm systems
• Battery-powered residential smoke alarms

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix 'S16TF' corresponds to the 16-SOIC surface mount package and tape-and-reel shipping configuration. Confirm RoHS compliance status and lead-free packaging details directly with the manufacturer or authorized distributors prior to ordering. Ensure the design accommodates the specified humidity sensitivity level and storage conditions.

Sensor And Detector Interfaces Selection Notes

Select this model when a temporal alarm pattern is required rather than continuous tone. It is suitable for designs needing integrated alarm memory and hush timer functions. Verify that the external component values for the oscillator and gain capacitors align with the typical application circuit provided in the datasheet to ensure proper timing and sensitivity calibration.

Sensor And Detector Interfaces Part Context

This component belongs to the RE46C165/6/7/8 family of low-power CMOS photoelectric smoke detector ICs. The RE46C166 variant specifically utilizes a 9-minute sensitivity control time and temporal horn output. Other family members include the RE46C165 (continuous tone), RE46C167, and RE46C168 (1.2-minute sensitivity times).

Sensor And Detector Interfaces Replacement Considerations

RE46C165S16TF differs by offering continuous tone output instead of temporal patterns. RE46C167S16TF and RE46C168S16TF provide faster 1.2-minute sensitivity control times compared to the 9-minute duration of the RE46C166.