General Description
The AS1976/AS1977 are very low-current comparators that can operate beyond the rail voltages and are guaranteed to operate down to 1.8V Low input bias current, current-limiting output circuitry, and ultra-small packaging make these comparators ideal for low-power 2-cell applications including power management and power-monitoring systems.

KEY FEATUREs
CMOS Push/Pull Output Sinks and Sources 8mA (AS1976)
CMOS Open-Drain Output Voltage Extends Beyond VCC(AS1977)
Ultra-Low Supply Current: 200nA
Internal Hysteresis: 3mV
Guaranteed to Operate Down to +1.8V
Input Voltage Range Operates 200mV Beyond the Rails
Crowbar Current-Free Switching
No Phase Reversal for Overdriven Inputs
5-pin SOT23 Package