How long is the rising edge of a 74ls173 register. Here is a link http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_46922_-1 I need to load a register, output it into full adders, load the sum into another register, and output that register into another register all in the rising edge of the clock signal. Is the 74ls series fast enough to accomplish this?