The FT7521 is a timer for resetting a mobile device where long reset times are needed. The long delay helps avoid unintended resets caused by accidental key presses. It has a fixed delay of 7.5 ±20% seconds. The DSR pin enables Test Mode operation by immediately forcing /RST1 LOW for factory testing. The FT7521 has one input for single-button resetting capability. The device has a single open-drain output with 0.5 mA pull-down drive. current when inactive and functions over a power supply range of 2.0 V to 5.0 V.
