The maximum clock frequency of the LM3S1607 is 50 MHz.
The LM3S1607 has 256 KB of flash memory.
Yes, the LM3S1607 can operate at 3.3V, but it is also 1.8V tolerant.
Yes, the LM3S1607 has a built-in USB 2.0 full-speed interface.
The power consumption of the LM3S1607 varies depending on the operating mode, but it can be as low as 350 μA/MHz in active mode and 2.5 μA in sleep mode.