- 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)
The auto-standby feature allows the comparator to automatically change from low-power mode to highspeed 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.
The MAX975/MAX977's inputs have a common-mode voltage range of -0.2V to (VCC - 1.2V). The differential input voltage range extends rail to rail. The outputs are capable of rail-to-rail operation without external pull-up circuitry, making these devices ideal for interface with CMOS/TTL logic. All inputs and outputs can tolerate a continuous short-circuit fault condition to either rail. The comparator's internal hysteresis in high-speed mode ensures clean output switching, even with slow-moving input signals.
The single MAX975 is available in 8-pin SO and 8-pin µMAX® packages, while the dual MAX977 is available in 14-pin SO and 16-pin QSOP packages.