General Description
Maxim’s MAX8211 and MAX8212 are CMOS micropower voltage detectors that warn microprocessors (µPs) of power failures. Each contains a comparator, a 1.5V bandgap reference, and an open-drain N-channel output driver. Two external resistors are used in conjunction with the internal reference to set the trip voltage to the desired level. A hysteresis output is also included, allowing the user to apply positive feedback for noise-free output switching. The MAX8211 provides a 7mA current-limited output sink whenever the voltage applied to the threshold pin is less than the 1.5V internal reference. In the MAX8212, a voltage greater than 1.5V at the threshold pin turns the output stage on (no current limit). The CMOS MAX8211/MAX8212 are plugin replacements for the bipolar ICL8211/ICL8212 in applications where the maximum supply voltage is less than 16.5V. They offer several performance advantages, including reduced supply current, a more tightly controlled bandgap reference, and more available current from the hysteresis output.
Applications
µP Voltage Monitoring
Undervoltage Detection
Overvoltage Detection
Battery-Backup Switching
Power-Supply Fault Monitoring
Low-Battery Detection
Features
• µP Power-Fail Warning
• Improved 2nd Source for ICL8211/ICL8212
• Low-Power CMOS Design
• 5µA Quiescent Current
• On-Board Hysteresis Output
• ±40mV Threshold Accuracy (±3.5%)
• 2.0V to 16.5V Supply-Voltage Range
• Define Output Current Limit (MAX8211)
• High Output Current Capability (MAX8212)
ROHS PROGRAMMABLE VOLTAGE DETECTORDIP-8 MAX8211CPA
