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SN74ALVC244 drive capacitance

I am looking at obtaining this part http://focus.ti.com/docs/prod/folders/print/sn74alvc244.html. However I can not find on the datasheet or on the web how much capacitance the buffer can drive. The current setup can drive approx 70 pF but when you add up the capacitance of the card and the coax we are running the digital signals through it is more than that and the output becomes essentially just noise instead of nice clean pulses. Any help in this matter would be much appreciated.