  The phase ordering properties of lattices of band-chaotic maps coupled
diffusively with some coupling strength $g$ are studied in order to determine
the limit value $g_e$ beyond which multistability disappears and non-trivial
collective behavior is observed. The persistence of equivalent discrete spin
variables and the characteristic length of the patterns observed scale
algebraically with time during phase ordering. The associated exponents vary
continuously with $g$ but remain proportional to each other, with a ratio close
to that of the time-dependent Ginzburg-Landau equation. The corresponding
individual values seem to be recovered in the space-continuous limit.
