BUY MAX921EPA+ https://www.utsource.net/itm/p/7529505.html
Comparator with Voltage Reference CMOS, TTL 8-PDIP
Description: The MAX921EPA+ is a low-power, single-supply, CMOS comparator with an open-drain output. Features: Low Supply Current: 0.6μA (Typ) Low Input Bias Current: 0.5nA (Typ) Low Input Offset Voltage: 0.5mV (Typ) Wide Supply Range: 2.7V to 16V Low Output Saturation Voltage: 0.3V (Typ) Fast Response Time: 0.8μs (Typ) Open-Drain Output 8-Pin DIP Package Applications: Battery-Powered Systems Portable Instruments Automotive Systems Industrial Control Systems Data Acquisition Systems Power Supply Monitoring (For reference only)