RE46C803SS20T

Sensor And Detector Interfaces Overview

The RE46C803SS20T is a low-voltage, low-power CMOS carbon monoxide detector companion IC manufactured by Microchip Technology. It provides analog, interface, and power regulation functions for microcontroller-based CO or toxic gas detectors in 3V battery applications. The device features a boost converter and horn driver circuit suitable for driving a piezoelectric horn, a 3.3V regulator for microcontroller voltage regulation, an LED driver, and an operational amplifier. It operates from a 3V supply with a typical standby current of 2.2 µA and quiescent current of 33 µA. The package is a 20-lead Plastic Shrink Small Outline (SSOP) with Tape & Reel option.

Sensor And Detector Interfaces Feature Summary

• Integrated 9V boost converter and horn driver circuit for piezoelectric transducers
• Dual voltage regulators providing 1.8V for sensor biasing and 3.3V for microcontroller operation
• Unity gain stable operational amplifier with rail-to-rail input and output capabilities
• Low quiescent current design optimized for extended battery life in portable detection systems

Sensor And Detector Interfaces Applications

• Microcontroller-based carbon monoxide (CO) detectors
• Toxic gas detection systems requiring external sensor biasing
• Portable safety monitoring devices powered by 3V batteries

Sensor And Detector Interfaces Procurement Notes

Verify the specific ordering suffix 'T' indicates the Tape & Reel packaging configuration as defined in the product identification system. Confirm that the SS20 designation corresponds to the 20-lead Plastic Shrink Small Outline package. Ensure compatibility with the required operating temperature range of -10°C to +60°C for your specific application environment before finalizing procurement.

Sensor And Detector Interfaces Selection Notes

Select this component when designing a CO or toxic gas detector that requires integrated power management and signal conditioning. It is suitable for applications needing a 9V boost for horn drivers and regulated 1.8V/3.3V rails. Consider the 20-lead SSOP package constraints and the -10°C to +60°C operating temperature range. Verify that the microcontroller interface can drive the CEN, HRNEN, and LEDEN pins appropriately for boost mode activation.

Sensor And Detector Interfaces Part Context

The RE46C803 belongs to Microchip's family of companion ICs designed specifically for gas detection applications. Unlike smoke detector ICs, this model focuses on electrochemical sensor support for carbon monoxide and toxic gases. It complements microcontrollers by handling high-current tasks like horn driving and boost conversion, allowing the main processor to remain in low-power states until an alarm condition is detected.

Sensor And Detector Interfaces Replacement Considerations

Direct substitutes within the RE46C803 series include variants with different packaging options such as the tube version (RE46C803SS20). No other cross-family direct replacements are documented in the provided datasheet.