RE46C600S16T

Sensor And Detector Interfaces Overview

The RE46C600S16T is a low-power CMOS ionization smoke detector companion IC in a 16-lead SOIC package. It integrates analog, interface, and power regulation functions for microcontroller-based detectors. Key electrical parameters include a supply voltage (VDD) of 2–3.6 V for battery-only or 2–4.2 V for AC operation. The boost converter outputs a nominal VO of 9 V with peak current limiting at 0.8 A. The internal regulator provides a stable VREG of 4 V. Standby currents range from 0.9 µA to 50 µA depending on configuration. The op amp features a 10 kHz gain-bandwidth product and rail-to-rail I/O.

Sensor And Detector Interfaces Feature Summary

• Integrates a 9V boost converter and horn driver circuit suitable for piezoelectric transducers.
• Provides a regulated 4V output specifically designed for microcontroller power supply during AC conditions.
• Features a low-leakage operational amplifier with rail-to-rail input and output capabilities for ionization sensor monitoring.
• Supports alarm interconnect functionality for linking multiple detection units.

Sensor And Detector Interfaces Applications

• Ionization smoke detectors operating on 3V battery power
• AC-powered smoke detectors with 3V battery backup
• Interconnected fire alarm systems requiring unit-to-unit signaling

Sensor And Detector Interfaces Procurement Notes

Verify the ordering suffix 'S16T' corresponds to the 16-lead Plastic Small Outline Integrated Circuit (SOIC) package with Tape and Reel delivery format. Confirm that the component matches the specific Microchip Technology part number RE46C600S16T to ensure correct pinout and packaging specifications for your design implementation.

Sensor And Detector Interfaces Selection Notes

Select this component when designing an ionization smoke detector requiring integrated high-voltage generation and low-quiescent current management. Ensure the application supports the specified operating temperature range of -10°C to +60°C. Verify that the system architecture utilizes a microcontroller to manage the logic inputs for the boost converter, regulator, and horn driver modes.

Sensor And Detector Interfaces Part Context

The RE46C600 series serves as a dedicated companion IC for ionization smoke detection systems. The S16T variant specifically denotes the narrow SOIC package option. This family replaces discrete component solutions by consolidating power regulation, signal amplification, and acoustic driving into a single low-power CMOS device.

Sensor And Detector Interfaces Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip Technology directly for qualified alternatives or cross-reference options compatible with the RE46C600 functional requirements.

Sensor And Detector Interfaces FAQ

How does the RE46C600 handle power switching between battery and AC sources?

The device uses the ACDET pin to detect AC presence. When AC is present, the internal 4V regulator powers the system. In battery-only mode, the ACDET pin is held low, enabling the boost converter to generate the necessary 9V for the horn and interconnect functions.

What is the maximum output current capability of the VREG pin?

The voltage regulator at the VREG pin can source current up to 20 mA. Its current sinking capability is typically under 1 µA, making it suitable for powering low-current microcontrollers.

What are the absolute maximum ratings for the LX pin voltage?

The absolute maximum rating for the LX pin, which drives the boost converter inductor, is +15 V. Exceeding this stress rating may cause permanent damage to the device.