RE46C100D8F

Sensor And Detector Interfaces Overview

The RE46C100D8F is a piezoelectric horn driver circuit manufactured by Microchip Technology, housed in an 8-lead 2x3 mm DFN package with an exposed thermal pad. It operates on a supply voltage range of 2V to 16V and draws less than 100 nA of quiescent current when disabled. The device features a push-pull output stage with a typical driver resistance of 20 ohms at 9V. It supports self-oscillating three-terminal horns or direct drive applications via the FEED pin. The HRNEN pin provides logic-high enable control for the horn output.

Sensor And Detector Interfaces Feature Summary

• Provides feedback control and a dedicated horn enable function for driving piezoelectric transducers.
• Supports both self-oscillating three-terminal horns and two-terminal direct drive configurations.
• Features low quiescent current consumption suitable for battery-powered applications.

Sensor And Detector Interfaces Applications

• Smoke detectors
• Carbon monoxide (CO) detectors
• Personal security products
• Electronic toys

Sensor And Detector Interfaces Procurement Notes

Verify the component against the official Microchip datasheet DS20002166B to confirm authenticity. Ensure the received part matches the 8-lead DFN physical dimensions and marking codes specified in the documentation. Check for lead-free compliance markings consistent with the 'F' suffix designation.

Sensor And Detector Interfaces Selection Notes

Select this component when designing circuits requiring a low-power driver for piezoelectric horns in smoke or CO alarms. The 2x3 DFN package is appropriate for space-constrained designs. Ensure the application voltage remains within the 2V to 16V operating range and that the load matches the push-pull output capabilities.

Sensor And Detector Interfaces Part Context

The RE46C100D8F belongs to the RE46C100 family of CMOS photoelectric smoke detector ASICs. The 'D' suffix indicates the 8-lead DFN package, while '8' denotes the pin count and 'F' signifies lead-free packaging. This specific variant integrates the horn driver functionality required for alarm sounders in safety detection systems.

Sensor And Detector Interfaces Replacement Considerations

Direct replacements include other members of the RE46C100 family such as RE46C100E8F (PDIP) or RE46C100S8F (SOIC), provided the package footprint is adaptable. Cross-family substitutes are not documented in the official specifications.