RE46C165E16F

Sensor And Detector Interfaces Overview

The RE46C165E16F is a low-power CMOS photoelectric smoke detector ASIC manufactured by Microchip Technology. It operates within a supply voltage range of 5V to 12V and supports an operating temperature range from -25°C to +75°C. The device features a typical quiescent current consumption of less than 8 µA at 9V. It incorporates a gain-selectable photo amplifier, internal power-on reset, and over 2000V ESD protection on all pins. The IC provides temporal horn patterns compliant with NFPA 72 standards, alarm memory functionality, and interconnect capabilities for up to 40 detectors.

Sensor And Detector Interfaces Feature Summary

• Supports temporal horn patterns or continuous tone output
• Includes alarm memory feature to track previous local alarms
• Features sensitivity control timer mode for reduced sensitivity operation
• Provides interconnect capability for multiple detector systems

Sensor And Detector Interfaces Applications

• Photoelectric type smoke detectors
• Systems requiring NFPA 72 emergency evacuation signals
• Interconnected fire detection networks

Sensor And Detector Interfaces Procurement Notes

Verify the specific ordering suffix against official datasheets to confirm package type and temperature grade. Confirm RoHS compliance status through manufacturer documentation before procurement. Ensure design specifications align with the absolute maximum ratings provided in the electrical characteristics section.

Sensor And Detector Interfaces Selection Notes

Select this component for applications requiring low standby current and integrated smoke detection logic. Consider the 9-minute sensitivity control times specifically associated with the RE46C165/6 variants. Verify that the required horn pattern matches the temporal output supported by this specific model number.

Sensor And Detector Interfaces Part Context

This part belongs to the RE46C165/6/7/8 family of CMOS photoelectric smoke detector ASICs. While sharing core architecture, the RE46C165 variant is distinguished by its specific 9-minute sensitivity control timer duration compared to other members in the series.

Sensor And Detector Interfaces Replacement Considerations

RE46C166E16F, RE46C167E16F, RE46C168E16F

Sensor And Detector Interfaces FAQ

What is the function of the TEST pin?

The TEST pin invokes push-to-test modes, chamber tests, and can initiate the Timer mode for reduced sensitivity when specific resistor conditions are met.

How does the device handle low battery conditions?

The device checks battery voltage every 43 seconds and triggers a horn chirp if the voltage falls below the threshold, unless a local or remote alarm is active.

What is the purpose of the I/O pin?

The bidirectional I/O pin allows interconnection of multiple detectors, enabling remote alarm signaling and featuring a charge dump feature to discharge the line after a local alarm.