  The Extended Analogue Silicon Photo-multiplier Integrated Read Out Chip,
EASIROC, is a chip proposed as front-end of the camera at the focal plane of
the imaging Cherenkov ASTRI SST-2M telescope prototype. This paper presents the
results of the measurements performed to characterize EASIROC in order to
evaluate its compliance with the ASTRI SST-2M focal plane requirements. In
particular, we investigated the trigger time walk and the jitter effects as a
function of the pulse amplitude. The EASIROC output signal is found to vary
linearly as a function of the input pulse amplitude with very low level of
electronic noise and cross-talk (<1%). Our results show that it is suitable as
front-end chip for the camera prototype, although, specific modifications are
necessary to adopt the device in the final version of the telescope.
