The MC10H189 is a Hex Inverter with a common Enable input. The hex inverting function is provided when Enable is in the low–state. When Enable is in the high–state, all outputs are low.
This MECL 10H part is a functional/pinout duplication of the standard MECL 10K family part, with 100% improvement in propagation delay and no increase in power–supply current.

• Propagation Delay, 1.3 ns Typical Data–to–Output
• Power Dissipation 180 mW Typ/Pkg (No Load)
• Improved Noise Margin 150 mV (Over Operating Voltage and Temperature Range)
• Voltage Compensated
• MECL 10K–Compatible