Single CMOS comparator with push-pull output — what it is and where it fits
The Texas Instruments TLV7211IDCKT is a single, general-purpose CMOS comparator with a push-pull output stage that eliminates the external pull-up resistor required by open-drain comparators. It operates from a 2.7 V to 15 V single supply, draws a maximum quiescent current of 18 µA, and delivers a propagation delay of 10 µs. The rail-to-rail input range and 0.04 pA typical input bias current make it suited for high-impedance sensor interfaces — think photodiode threshold detection, battery-voltage monitoring, or zero-crossing detectors in industrial controls. The industrial temperature grade (-40°C to 85°C) covers factory-floor and outdoor telecom enclosures.
10 µs propagation delay — what it means for the BOM
The 10 µs max propagation delay sets the response ceiling for level detection, zero-crossing, and overvoltage latch circuits. This comparator is not designed for high-speed PWM feedback or fast fault interrupts.
No pull-up, no buffer — push-pull output and sub-picoamp bias
Push-pull output drives logic levels directly to a microcontroller GPIO without an external pull-up, saving a resistor and one board layer. The 0.04 pA typical input bias current preserves accuracy when reading high-impedance sources like pH probes or photodiode amplifiers without a buffer stage. The 75 dB CMRR and 80 dB PSRR keep false triggers at bay in motor-drive or switching-PSU environments.
Lifecycle and sourcing
The SC-70-6 footprint is shared with several other single comparators, making it straightforward to dual-source for supply resilience.