SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.


Member Since: May 30, 2010

Country: United States

  • Were the 2K input resistor such a good idea on the data pins? When driven low, the voltage delivered to the pin (with the 4.7K pullup) is 0.299 * VIO, while the spec for the chip says it needs a Vlow of 0.3 * VIO… Seems to be cutting it close.

    Still trouble shooting why no I2C comm on mine. Time to bust out with a soldering iron…

  • I would either contact the seller, maybe they were sold failed chips as someone else had said (failed final packaged test).
    I know that every MCU is tested at wafer level, binned, and sold accordingly. To save costs, the bad die are rarely inked anymore, just virtually marked in a bin report, sent to the package house.
    Are there numbers on the bottom of the chips which are bad? I have an ATMEGA32-16PC on my desk, with a date code of 0419 on the top, and 3N0697-1-355P6B 3N0416 stampped on the bottom. The numbers on the bottom have special meaning.
    Atmel FA (failure analysis) may be interested in a few pieces. They can de-cap them and look at any product IDs on the die. They are in Colorado Springs. I am sure they would be interested in any counterfit leads….
    I have the mailing address for some people there who can get a chip or two to where they need to go.

No public wish lists :(