AD8611/AD8612 are ultrafast, single-supply comparators with a propagation delay of 4 ns and single-supply operation. They are suitable for high-speed timing, clock recovery and clock distribution, line receivers, digital communications, phase detectors, high-speed sampling, read channel detection, PCMCIA cards, zero-crossing detection, high-speed analog-to-digital converters (ADC), and upgrades for LT1394 and LT1016 designs.