RE46C143SW16F

Sensor And Detector Interfaces Overview

The RE46C143SW16F 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 4µA at 9V and 5.5µA at 12V. The device features an internal oscillator that powers detection circuitry for 100µs every 8.1 seconds. It includes a gain-selectable photo amplifier, low battery detection, and chamber integrity checks performed every 40 seconds. The horn pattern utilizes a 75% duty cycle. It supports interconnection of up to 40 detectors via the IO pin and is UL recognized per File S24036.

Sensor And Detector Interfaces Feature Summary

• Internal power-on reset and ESD protection on all pins
• Interconnect capability supporting up to 40 detectors
• Low battery warning and photo chamber integrity testing
• UL recognized for use in compliant smoke detectors

Sensor And Detector Interfaces Applications

• Photoelectric smoke detectors complying with UL217 and UL268
• Multi-unit interconnected fire alarm systems
• Battery-powered residential safety devices

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix 'SW16F' against official datasheets to confirm package type and RoHS compliance status. Ensure ordering documentation matches the manufacturer's part number exactly. Confirm lead times and packaging quantities directly with authorized distributors or the manufacturer prior to purchase.

Sensor And Detector Interfaces Selection Notes

Select this component for applications requiring a complete photoelectric smoke detection solution with minimal external components. Consider the 16L W SOIC package for surface mount requirements. Verify compatibility with existing infrared emitter/detector pairs and piezoelectric transducers used in the target design.

Sensor And Detector Interfaces Part Context

The RE46C143 belongs to the RE46C1xx series of CMOS photoelectric smoke detector ICs from Microchip Technology (formerly R&E International). This series provides integrated signal processing and control for smoke sensing applications. The SW16F designation indicates a wide-body SOIC package variant.

Sensor And Detector Interfaces Replacement Considerations

The Motorola MC145010 is listed as compatible. Direct substitutes may include other RE46C143 variants with different packaging options such as PDIP or standard SOIC.