The MC10H166 is a 5-Bit Magnitude Comparator and is a functional/ pinout duplication of the standard MECL 10K part with 100% improvement in propagation delay and no increase in power-supply current. The MC10H166 is a high-speed expandable 5-bit comparator for comparing the magnitude of two binary words. Two outputs are provided: AB. The A = B function can be obtained by wire-ORing these outputs (a low level indicates A = B) or by wire-NORing the outputs (a high level indicates A = B). A high level on the enable function forces both outputs low.