RE46C140E16F

Sensor And Detector Interfaces Overview

The RE46C140E16F is a CMOS photoelectric smoke detector ASIC designed for standalone or interconnected fire alarm systems. It operates on a supply voltage range of 5V to 12V with typical standby currents of 4µA to 8µA. The device features an internal oscillator that powers detection circuitry for 100µs every 10 seconds, increasing frequency upon smoke detection. 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 standards and performs automatic low battery and chamber integrity checks.

Sensor And Detector Interfaces Feature Summary

• Integrated gain-selectable photo amplifier for infrared emitter/detector pairs
• Bidirectional interconnect capability supporting up to 40 linked units
• Internal diagnostic functions for low battery and photo chamber testing
• Programmable 10-minute timer mode for temporary sensitivity reduction

Sensor And Detector Interfaces Applications

• Standalone photoelectric smoke alarms
• Interconnected residential fire alarm systems
• Commercial smoke detection panels requiring NFPA 72 compliance

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix E16F against the manufacturer's current datasheet revision DS22179B to confirm package type and RoHS status. Ensure ordering documentation matches the exact part number to avoid substitution errors. Confirm lead times directly with authorized distributors as availability fluctuates based on production cycles.

Sensor And Detector Interfaces Selection Notes

Select this component for applications requiring low quiescent current consumption in battery-powered environments. The internal oscillator and strobe functionality minimize external component count. Ensure the design accommodates the required external capacitors for gain setting and clock timing. Verify compatibility with the intended piezoelectric transducer drivers HB and HS pins.

Sensor And Detector Interfaces Part Context

The RE46C140 series belongs to Microchip's R&E International line of specialized sensor interface ASICs. These components are engineered specifically for smoke detection applications, integrating analog signal processing with digital timing controls. The family includes variants for ionization and photoelectric technologies, offering standardized interfaces for horn drivers and interconnect networks.

Sensor And Detector Interfaces Replacement Considerations

RE46C140SW16TF is listed as a direct substitute by distributors.