RE46C143SW16TF

Sensor And Detector Interfaces Overview

The RE46C143SW16TF is a CMOS photoelectric smoke detector ASIC manufactured by Microchip Technology. It operates on a supply voltage of 5V to 12V with typical standby currents of 4uA at 9V and 5.5uA at 12V. The device features an internal oscillator that powers detection circuitry for 100us every 8.1 seconds. It includes a gain-selectable photo amplifier, low battery detection, and chamber integrity testing. The IC supports interconnection of up to 40 detectors via the IO pin and utilizes a 75% duty cycle horn pattern. It is housed in a 16-lead Wide SOIC package.

Sensor And Detector Interfaces Feature Summary

• Integrated photoelectric smoke detection with selectable gain amplifiers for normal and high-sensitivity modes
• Interconnect capability allowing synchronization across multiple units within a single system
• Automated periodic diagnostics for low battery status and photo chamber integrity verification
• UL recognized component compliant with UL217 and UL268 safety specifications

Sensor And Detector Interfaces Applications

• Photoelectric smoke alarm systems requiring minimal external components
• Multi-unit interconnected fire detection networks
• Battery-powered residential or commercial smoke detectors

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix 'W' indicates the Wide SOIC package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation as packaging options vary. Ensure ordering quantities align with standard reel configurations provided by distributors. Cross-reference the datasheet revision DS22178B for accurate electrical limits during procurement validation.

Sensor And Detector Interfaces Selection Notes

Select this model for applications requiring photoelectric sensing technology with interconnect functionality. Compare against the RE46C143S16TF if a standard SOIC package is preferred over the wide variant. Consider the RE46C144SW16TF if timer mode integration is required alongside interconnect features. Verify operating temperature range requirements against the -25°C to +75°C specification.

Sensor And Detector Interfaces Part Context

This component belongs to the RE46C14x series of CMOS photoelectric smoke detector ASICs from Microchip Technology. It is functionally compatible with legacy designs using the Motorola MC145010. The series provides specialized analog front-end processing for infrared emitter/detector pairs integrated into smoke detection chambers.

Sensor And Detector Interfaces Replacement Considerations

The RE46C143S16TF serves as a direct functional substitute differing only in the SOIC package width. Designers must verify pin compatibility and PCB footprint adjustments when transitioning between the standard and wide SOIC variants.