The RE46C800 is a low power CMOS carbon monoxide detector companion IC. The RE46C800 provides all of the analog, interface, and power management functions for a microcontroller based CO or toxic gas detector. It is intended for use in both 3V and 9V battery or battery-backed applications. It features a high performance operational amplifier, a 3.3V regulator for microcontroller voltage regulation, a boost converter, horn driver circuit suitable for driving a piezoelectric horn, an LED driver, and an I/O circuit for communication with interconnected units.

• Low Quiescent Current
• Operation from 3 V or 9 V
• 10V Boost Regulator
• Horn Driver
• LED Driver
• 3.3V Regulated Voltage for Microcontroller Operation
• Internal Operational Amplifier
  • ±1mV Input Offset Voltage
  • 200pA Input Leakage Current
  • Rail-to-rail Input and Output
  • 10KHz Gain Bandwidth Product
  • Unity Gain Stable
• Bidirectional Alarm Interconnect