Earle Latch Properties
The Early latch:



The truth table can be derived from the circuit diagram:

----------------------
Clock  Data  Out(n+1)
----------------------
  0     0     Out(n)
  0     1     Out(n)
  1     0       0
  1     1       1
----------------------


One useful feature of Earle's latch is that it has a constant delay of 2 gates for any input. And this makes Earle latch hazard-free.