Microcontroller Supervisory IC Application Note
The N-channel open drain "H" Type ("H" Reset)
- Voltage Detector
A voltage detector with an individual SENSE pin and VDD pin require a circuit with two power supplies. However, such configuration depends on the application and two power supplies may not be available. Ricoh provides a product version ("H" Type) with an N-channel open drain output which offers a "H" reset signal instead of "L". Such "H" reset signal addresses a typical phenomenon at the output when sensing voltages below the minimum operating voltage of the voltage detector.
Compare R3111xxxxA/C versus the R3111xxxxB for details.