RE46C318E8F

Sensor And Detector Interfaces Overview

The RE46C318E8F is a CMOS piezoelectric horn driver integrated circuit manufactured by Microchip Technology. It operates on a supply voltage range of 2V to 5V, with typical operation at 3V. The device features an internal boost converter that generates a nominal output voltage of 10V to drive piezoelectric transducers. It utilizes binary logic for the Horn Enable (HRNEN) pin, supporting Low and High states only. Standby supply current is specified as a maximum of 0.1 µA when HRNEN is Low. The component is available in an 8-lead Plastic Dual In-Line (PDIP) package.

Sensor And Detector Interfaces Feature Summary

• Integrated push-pull horn driver capable of driving three-terminal or modified two-terminal piezoelectric horns
• Built-in current-mode boost regulator providing approximately 10V output for piezo actuation
• Binary Horn Enable logic controlling standby and active operational modes

Sensor And Detector Interfaces Applications

• Smoke Detectors
• CO Detectors
• Personal Security Products
• Electronic Toys

Sensor And Detector Interfaces Procurement Notes

Verify the specific ordering suffix 'E' corresponds to the 8-lead PDIP package configuration. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure the application design accommodates the required external components for the boost converter circuit.

Sensor And Detector Interfaces Selection Notes

Select this model over the RE46C317 variant when tri-state control is not required, as the RE46C318 uses simpler binary logic. Verify that the system battery voltage falls within the 2V to 5V operating range. Ensure the external inductor and capacitor values match the datasheet recommendations for optimal efficiency.

Sensor And Detector Interfaces Part Context

This component belongs to the RE46C317/18 family of piezoelectric horn drivers. It serves as a direct functional replacement for the RE46C117 while offering lower standby current consumption. The primary distinction within the family is the Horn Enable logic structure compared to other variants.

Sensor And Detector Interfaces Replacement Considerations

The RE46C317 is a compatible alternative within the same series. Designers must account for the difference in Horn Enable logic, as the RE46C317 supports a tri-state input while the RE46C318 does not.