We have recently experienced a number of failures in a design using the MSP430F2330 that has been in production for a couple of years. The problem seems to be associated with higher than normal supply current (normal is 2.2ma) that varies randomly over time in some cases from 5 to 20ma, sometime it returns to 2.2ma and holds for a period of time, then resumes the erratic higher currents. In some cases, the current has increased to as much as 63ma and stays locked at that value. This board connects to another board via a 6-conductor cable that includs power/ground, two I/O lines and the /RST and TCK lines which are used for BSL programming.
I suspect there may have been ESD damage. Has anyone seen similar behavior of this type?