The HFA-0003/0003L are monolithic, ultra high speed, voltage comparators. These comparators combine a low input offset voltage (1.0mV) with a low propagation delay (2.0ns) to achieve a large dynamic input range. The low offset voltage also makes these comparators ideally suited for high speed, precision analog-to-digital processing applications. The circuits have differential analog inputs, and provide complementary, ECL compatible (10K and 100K) logic outputs. The outputs are capable of supplying the current required by terminated 50 transmission lines. Both outputs are open emitter structures, requiring external pull-down resistors. The recommended circuit is 50 connected to 2.0V, but any equivalent ECL termination circuit may be used.