Producing a delayed digital waveform with the help of an RC and a pair of LVC-family logic buffers

Art of Electronics 3rd edition Figure 1.37 In the original figure the gates are SN74LVC1G17DCKR "Single Schmitt-Trigger Buffers" http://www.ti.com/lit/ds/symlink/sn74lvc1g17.pdf The signal delay is 10us (in the original figure)