Micropower UP Watch Dog Timer

The AME8510 AME8520/AME8530 family allows the user to cus- tomize the CPU monitoring function without any external components. The user has a large choice of reset volt- age thresholds and output driver configurations, all of which are preset at the factory. Each wafer is trimmed to the customer's specifications. These circuits will ignore fast negative going transients on V . The state of the reset output is guaranteed to be IN correct down to 1V. After V crosses above a factory preset threshold, the IN AME8510 AME8520/AME8530 assert a reset signal. After a pre- determined time (the,reset, interval) the reset is deasserted. If V ever drops below the threshold voltage IN a reset is asserted immediately. In addition to a supply monitoring function the AME8510 AME8520/AME8530 also monitor tran- sitions at the watch dog input (WDI). If a Logic transition does not occur at the WDI pin within a certain time inter- val (the atchdognterval) then a reset is asserted. The reset deasserts after the reset interval, as explained ear- lier. By AME, Inc.