RE46C140SW16TF

Sensor And Detector Interfaces Overview

The RE46C140SW16TF is a CMOS photoelectric smoke detector ASIC designed for minimal external component requirements. It operates on a supply voltage of 5V to 12V with typical standby currents of 4µA to 8µA and active currents up to 3mA. The device features an internal oscillator that powers detection circuitry for 100µs every 10 seconds, increasing frequency upon smoke sensing. It supports interconnection of up to 40 detectors via the IO pin and includes a 10-minute timer mode for sensitivity control. The IC provides temporal horn patterns compliant with NFPA 72 and performs low battery and chamber integrity checks every 43 seconds.

Sensor And Detector Interfaces Feature Summary

• Internal power-on reset and ESD protection on all pins
• Interconnect capability supporting up to 40 detectors in a single system
• Built-in 10-minute timer mode for adjustable sensitivity control
• Supports temporal horn pattern for emergency evacuation signaling

Sensor And Detector Interfaces Applications

• Photoelectric smoke detectors complying with UL217 and UL268 specifications
• Multi-unit interconnected fire alarm systems
• Emergency evacuation signaling devices requiring NFPA 72 compliance

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix 'W' indicates the WSOIC package variant when sourcing. Confirm RoHS compliance status as packaging options vary between standard and lead-free versions. Ensure ordering quantities align with manufacturer distribution channels. Cross-reference datasheet revision DS22179B for accurate electrical characteristics during procurement validation.

Sensor And Detector Interfaces Selection Notes

Select this model for applications requiring photoelectric detection with interconnect functionality. The SW16 suffix denotes the wide SOIC package; verify footprint compatibility against PCB layout constraints. Consider the 10-minute timer feature if temporary sensitivity reduction is required. Ensure external components match the typical application circuit values for optimal performance within the specified temperature range.

Sensor And Detector Interfaces Part Context

This component belongs to the RE46C140 family of CMOS photoelectric smoke detector ASICs manufactured by Microchip Technology. It is part of the R&E International product line acquired by Microchip. The device integrates signal processing, timing, and horn driving capabilities into a single chip, reducing the bill of materials for smoke detection hardware compared to discrete solutions.

Sensor And Detector Interfaces Replacement Considerations

RE46C140SW16F is a direct substitute offering identical functionality in tube packaging instead of tape and reel.