CMOS Mlcro-Power Comparator plus Voltage Follower

The MC14578 is an analog building block consisting of a very–high input impedance comparator. The voltage follower allows monitoring the noninverting input of the comparator without loading.
Four enhancement–mode MOSFETs are also included on chip. These FETs can be externally configured as open–drain or totem–pole outputs. The drains have on–chip static–protecting diodes. Therefore, the output voltage must be maintained between VSS and VDD.
The chip requires one external component. A 3.9 MΩ ±10% resistor must be connected from the Rbias pin to VDD.

• Applications:
   Pulse Shapers                 Line–Powered Smoke Detectors
   Threshold Detectors        Liquid/Moisture Sensors
   Low–Battery Detectors
• DIP Complies with the UL217 and UL268 Specifications
• Operating Voltage Range: 3.5 to 14 V
• Operating Temperature Range: -30° to 70°C
• Input Current (IN + Pin): ±1 pA @ 25°C (DIP Only)
• Quiescent Current: 10 µA @ 25°C
• Electrostatic Discharge (ESD) Protection Circuitry on All Pins
• Chip Complexity: 26 FETs