General Description
The MAX975/MAX977 single/dual comparators feature three different operating modes, and are optimized for +3V and +5V single-supply applications. The operating modes are as follows: high speed, high speed with auto-standby, and low power. Propagation delay is 28ns in high-speed mode, while supply current is only 250µA. Supply current is reduced to 3µA in low-power mode.
The auto-standby feature allows the comparator to automatically change from low-power mode to high speed mode upon receipt of an input signal. In the absence of an input signal, the comparator reverts back to low-power mode after an adjustable timeout period. The timeout period for the MAX975 to enter standby is set by a single capacitor. The dual MAX977 features independently adjustable timeout periods for each comparator using separate capacitors.

FEATUREs
♦ Three Operating Modes:
   High Speed
   High Speed with Auto-Standby
   Low Power
♦ 28ns Propagation Delay (high-speed mode)
♦ 5µA Max Supply Current in Low-Power/Auto-Standby Modes
♦ +3V/+5V Single-Supply Operation
♦ Rail-to-Rail Outputs
♦ Ground-Sensing Input
♦ Internal Hysteresis (high-speed mode)
♦ Adjustable Timeout Period
♦ µMAX Package (MAX975) QSOP-16 Package (MAX977)

APPLICATIONs
    Battery-Powered Systems
    RF ID Tags
    Keyless Entry
    Threshold Detectors/Discriminators
    3V Systems
    IR Receivers
    Digital-Line Receivers