when you say continuity, do you mean just with the beep mode on the multimeter, or you measure 0 ohms?
if its just the beep, that comes down to the meter your measuring with,
if its 3 digits or less ohms, then you likely have had the chip latch up destructivly, and short out, or over driven a protection diode between the rails and shorted a diode (generally only happens when abused with a current limited supply to stop it fusing)