• The 4049 contains 6 Inverter gates.
• Minimum supply voltage 3v
• Maximum supply voltage 15v
• Max current per output 10mA
• Maximum speed of operation 4MHz
• Current consumption approx 1uA with nothing connected to the inputs or outputs.

See also 4069UB
The 4069UB has better placement of the inverters and takes less current. It is also a 14 pin chip.