RE46C144SW16F

Sensor And Detector Interfaces Overview

The RE46C144SW16F is a CMOS photoelectric smoke detector ASIC manufactured by Microchip Technology, housed in a 16-lead Wide SOIC package. It operates on a supply voltage ranging from 5V to 12V with typical standby currents of 4µA at 9V and 5.5µA at 12V. The device features an internal oscillator that powers detection circuitry for 100µs every 10 seconds. It supports interconnection of up to 40 detectors and includes a 10-minute timer mode for sensitivity control. The IC provides low battery and chamber test diagnostics, utilizing a 75% duty cycle horn pattern.

Sensor And Detector Interfaces Feature Summary

• Integrated gain-selectable photo amplifier for infrared emitter/detector pairs
• Bidirectional interconnect pin supporting multi-unit alarm synchronization
• Internal low battery and chamber integrity testing mechanisms
• Configurable 10-minute reduced sensitivity timer mode

Sensor And Detector Interfaces Applications

• Photoelectric smoke detectors compliant with UL217 and UL268 standards
• Multi-zone fire alarm systems requiring interconnected detector units
• Battery-powered residential smoke alarm devices

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix 'SW' confirms the 16-lead Wide SOIC (7.50mm) package variant. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure the ordering quantity matches the standard tube packaging requirements specified by Microchip Technology for this package type.

Sensor And Detector Interfaces Selection Notes

Select this component for designs requiring a dedicated photoelectric smoke detection solution with minimal external components. The wide SOIC package facilitates surface mount assembly. Consider the 10-minute timer feature if temporary sensitivity reduction is required during cooking or cleaning activities. Verify compatibility with the intended piezoelectric horn driver configuration.

Sensor And Detector Interfaces Part Context

This part belongs to the RE46C144 family of CMOS photoelectric smoke detector ASICs. The SW suffix specifically denotes the 16-lead Wide SOIC package option. Other variants include narrow SOIC and PDIP packages within the same functional family. The device is designed to replace discrete component solutions in smoke detection applications.

Sensor And Detector Interfaces Replacement Considerations

Direct substitutes include other RE46C144 package variants such as RE46C144S16F (narrow SOIC) or RE46C144E16F (PDIP), provided the PCB footprint allows. Cross-package replacements require schematic review for pinout compatibility and thermal management adjustments.