QDo you have an ADuC848 working at supply range 2.7 to 5.5 V?
AIt is not possible to get a single ADuC848 that runs off power supplies of 3-
5 volts. You have to order either the 3V or 5V version of the device (different
silicon). Order an ADUC848 with -5 or a -3 suffix as appropriate.