Difference between a n bit Latch and a buffer
What is the difference between a 8 bit buffer and a 8 bit latch?


With regards to low-level electronics, a buffer is a device whose output will always follow its input. A latch's output will follow its input only while the latch enable is active; when the enable goes inactive the latch will hold the last value it had.

At a high level, "buffer" simply means any sort of circuit that will sustain a previous value, and therefore the term has no place in any sort of discussion that requires enough precision to mention "latch".


  Are they both used for the same purpose?


Not at the low level.


  The 74LS273, is a buffer or a latch?


Latches are level-enabled. The '273, being edge-enabled, is a flop-flop.