RE46C109S16F

Sensor And Detector Interfaces Overview

The RE46C109S16F is a CMOS integrated circuit designed for low-voltage regulation and high-voltage piezoelectric horn driving. It features an internal charge pump boost regulator that converts the VDD supply to a regulated 12V output (VPOS) for horn driver activation. The device includes a 3V low-dropout voltage regulator (VREG) with overvoltage clamping, power-good monitoring, and brownout protection. It supports interconnect logic via bidirectional IO pins for multi-unit communication and provides a low-battery detection interface. Operating from a 6V to 12V supply, it draws a maximum quiescent current of 6.5uA when inactive. The component is housed in a 16-pin SOIC-Narrow package.

Sensor And Detector Interfaces Feature Summary

• Integrated switched-capacitor charge pump generates a regulated 12V output for driving piezoelectric horns.
• Built-in 3V low-dropout voltage regulator with overvoltage clamp and power-good status indication.
• Bidirectional interconnect logic enables communication between multiple units in a system.
• Low battery detection interface provides analog output proportional to the main supply voltage.

Sensor And Detector Interfaces Applications

• Smoke detectors
• Carbon monoxide detectors
• Personal security products
• Electronic games
• Hand held instruments

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix 'S16F' against the manufacturer's official documentation to confirm the package type and RoHS compliance status. Ensure the ordering information matches the exact part number required for your bill of materials. Confirm moisture sensitivity levels and storage conditions prior to assembly to maintain component reliability.

Sensor And Detector Interfaces Selection Notes

Select this component when a single-chip solution is needed for both microprocessor voltage regulation and piezoelectric horn driving. It is suitable for battery-operated systems requiring low standby current and integrated low-battery signaling. Verify that the external capacitor requirements for the charge pump and LDO fit within the design constraints.

Sensor And Detector Interfaces Part Context

The RE46C109 belongs to a family of specialized interface and sensor support ICs manufactured by Microchip Technology. These components are engineered to reduce system complexity by integrating power management and signal conditioning functions typically handled by discrete circuits. This specific model focuses on combining voltage conversion with acoustic output control.

Sensor And Detector Interfaces Replacement Considerations

RE46C109S16TF is listed as a direct substitute for the RE46C109S16F.

Sensor And Detector Interfaces FAQ

What is the typical efficiency of the internal charge pump?

The charge pump power efficiency is approximately 85% at a -16mA load with a 6.5V input, while voltage efficiency reaches up to 99% under no-load conditions.

How does the device indicate regulator status?

The PG pin serves as an open-drain NMOS output that indicates whether the VREG output is above or below a specified threshold level.

What is the function of the LBST pin?

The LBST pin acts as an enable or strobe control for the analog low-battery detection function, activating the LBAT output when brought to a logic high level.