View max975 m datasheet:

19-1141; Rev 1; 11/98 Single/Dual, +3V/+5V Dual-Speed Comparators with Auto-Standby General Description ____________________________Features The MAX975/MAX977 single/dual comparators feature ¦ Three Operating Modes: three different operating modes, and are optimized for High Speed +3V and +5V single-supply applications. The operating High Speed with Auto-Standby modes are as follows: high speed, high speed with Low Power auto-standby, and low power. Propagation delay is 28ns ¦ 28ns Propagation Delay (high-speed mode) in high-speed mode, while supply current is only 250µA. Supply current is reduced to 3µA in low-power mode. ¦ 5µA Max Supply Current in Low-Power/ Auto-Standby Modes The auto-standby feature allows the comparator to automatically change from low-power mode to