  Isospin effects of the critical phenomena were studied via Xe isotopes in the
frame of lattice gas model. All the critical temperatures for four Xe isotopes
are close to 5.5 MeV at the same freeze-out density of about 0.39 $\rho_0$. The
critical values of power law parameter of mass distribution, mean multiplicity
of intermediate mass fragments (IMF), information entropy and Campi's second
moment show minor dependence on the isospin at the critical point.
