Lpc2000

--- In lpc2000@yahoogroups.com, "James Dabbs" <jdabbs@t...> wrote:
> We're working with several prototype boards.  Because of a layout 
error,
> we have a jumper on the linear regulator circuit.  On 2 boards, the
> jumper broke free and 1.8V was driven to the LPC2106 without 3.3V.  
On
> one of these board, the LPC2106 seems to have died (no 
oscillation); on
> the other, it's still working.
> 
> My question: does supplying 1.8V to an LPC2106 without 3.3V damage 
or
> destroy the part?  We're trying to figure out whether we need to 
replace
> the LPC2106 on the second board.

Just guessing - CMOS can do funny things sometimes like going into 
a 'latch-up' state, drawing lots of current and getting very hot. 
This can damage the chip if the power isn't disconnected. With the 
3.3V disconnected this might have happened. The other chip is 
probably OK.

Leon