The 1980 evaluation of A=77 (80Si05) has been, revised. The experimental nuclear spectroscopic data for known nuclides of mass number 77 (Cu, Zn, Ga, Ge, As, Se, Br, Kr, Rb, Sr) have been evaluated and presented together with adopted properties for levels and γ rays. No significant new data have been reported for 77Zn, 77Ge and 77As. A new isomer has been observed in 77Zn. New high-spin data are available for 77Br, 77Kr, 77Rb, and 77Sr. The data on 77Ga β − decay to 77Ge remain tentative and are in need of further investigation. The disagreement of Q( β −) value from βγ data with that from systematics is probably due to poorly known decay scheme of 77Ga.