RE46C145SW16F

Sensor And Detector Interfaces Overview

The RE46C145SW16F is a CMOS photoelectric smoke detector ASIC in a 16-lead Wide SOIC package. It operates on a supply voltage of 5V to 12V with typical standby current of 4µA at 9V. The device features an internal oscillator with a nominal period of 10ms, strobing detection circuitry every 10 seconds. It supports interconnection of up to 40 detectors via the IO pin and includes a 10-minute timer mode for sensitivity control. Low battery detection triggers a chirp every 43 seconds if voltage drops below 7.2V typ. The horn driver outputs support temporal alarm patterns compliant with NFPA 72.

Sensor And Detector Interfaces Feature Summary

• Integrated gain-selectable photo amplifier for infrared emitter/detector pairs
• Bidirectional interconnect pin enabling multi-unit alarm synchronization
• Internal low battery and chamber integrity testing routines
• Diagnostic mode allowing production calibration of the photo chamber

Sensor And Detector Interfaces Applications

• Photoelectric smoke detector systems requiring UL217 compliance
• Multi-unit interconnected fire alarm networks
• Smoke detectors with push-to-test functionality
• Devices utilizing temporal horn evacuation signals

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix SW16F corresponds to the 16-lead Wide SOIC package (7.50 mm body) as defined in the Product Identification System. Confirm Pb-free status via the JEDEC designator on outer packaging. Ensure ordering documentation matches the exact part number structure including package type and reel options if applicable.

Sensor And Detector Interfaces Selection Notes

Select this component for applications requiring minimal external components for photoelectric detection. Ensure external capacitor values for C1 and C2 are chosen to set appropriate high and normal gain levels based on chamber background reflections. Verify that the operating temperature range of -25°C to +75°C meets environmental requirements.

Sensor And Detector Interfaces Part Context

This part belongs to the RE46C145 family of CMOS photoelectric smoke detector ASICs. Variants include PDIP and Narrow SOIC packages. The SW suffix specifically denotes the Wide SOIC package option. The device is designed to replace older discrete solutions by integrating timing, amplification, and alarm logic into a single chip.

Sensor And Detector Interfaces Replacement Considerations

Publicly confirmed substitutes include the Allegro A5366 due to functional compatibility noted in the datasheet. Other RE46C145 variants with different package suffixes (E, S) may be considered if mechanical fit allows.