I know this reply is a bit late in coming but if anyone is looking try
SlickCharts - Free Tick Data Download for CME Emini Futures
They have the last 5 days tick data for
E-Mini S&P 500 (ES)
E-Mini Nasdaq 100 (NQ)
E-Mini Dow (YM)
E-Mini S&P Midcap 400 (EMD)
Tick Data File Format
Emini Contract, Expiration Year-Month, Trade Date, Time, Price, Volume
The Time is HHMMSS not sub-second,
I could be wrong but I don't think the CME provide sub-second data.