From the datasheet (for i.MX53xA, Automotive and Infotainment Applications Processors,
IMX53AEC, Rev. 4, 11/2011) :
MCIMX536AVV8C, mask N78C, 800 MHz, full feature set, 19 x 19 mm, 0.8 mm pitch BGA, Case TEPBGA-2
From the datasheet (for i.MX53xD Applications Processors for Consumer Products,
IMX53CEC, Rev. 4.1, 2/2012) :
MCIMX535DVV1C, mask N78C, 1 GHz, full feature set, temperature -20 to +85, 19 x 19 mm, 0.8 mm pitch BGA, Case TEPBGA-2