The APL6536 is a four channel supervisory IC designed to monitor voltage supplies in P and digital system. This IC can supervise any positive voltage using an external resistor divider to translate to a lower voltage for comparison to the internal 0.633V reference. Once any VMON input falls below 0.633V the PGOOD output is pulled low, the hysteresis of the internal reference is 15mV. The PGOOD pin has an internal 20k pull-up to VCC making an external pull-up resis-