RE46C180S16TF

Sensor And Detector Interfaces Overview

The RE46C180S16TF is a CMOS ionization smoke detector ASIC manufactured by Microchip Technology. It operates on a supply voltage range of 6V to 12V with typical standby current consumption of 3.8µA at 9V. The device features programmable standby and hush sensitivity, chamber voltage, and low battery set points. It supports interconnection of up to 40 detectors via the IO pin and includes alarm memory, horn synchronization, and auto alarm locate functions. The IC provides temporal or continuous horn patterns and complies with UL217 and UL268 standards.

Sensor And Detector Interfaces Feature Summary

• Integrated ionization smoke detection with programmable sensitivity and hysteresis
• Supports interconnection of multiple units with smart IO and charge dump capabilities
• Includes alarm memory, end-of-life indication, and reduced sensitivity modes
• Features internal supervisory tests for low battery and chamber functionality

Sensor And Detector Interfaces Applications

• Single and multiple station ionization smoke alarms
• Fire alarm systems requiring NFPA 72 compliant temporal horn patterns
• Interconnected detector networks with synchronized horn output

Sensor And Detector Interfaces Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and tape/reel specifications. Confirm RoHS compliance status and moisture sensitivity level requirements prior to procurement. Ensure that external components such as reverse battery protection circuits are included in the design, as the device lacks internal protection.

Sensor And Detector Interfaces Selection Notes

Select this component for applications requiring low quiescent current and programmable calibration parameters. Consider the operating temperature range of -10°C to +60°C when designing for extreme environments. Evaluate the need for alarm memory and end-of-life indicators based on system requirements. Ensure the design accommodates the required external ionization chamber and piezoelectric transducer connections.

Sensor And Detector Interfaces Part Context

The RE46C180 belongs to Microchip's family of dedicated smoke detector integrated circuits designed for ionization sensing applications. It replaces discrete component solutions by integrating timing, comparison, and drive functions into a single CMOS chip. This integration reduces board space and simplifies manufacturing processes for smoke alarm manufacturers.

Sensor And Detector Interfaces Replacement Considerations

Consult Microchip Technology for officially confirmed substitute part numbers within the RE46 series. Verify compatibility of pinouts and electrical characteristics before considering any alternative devices.