View tcm809 810 datasheet:

TCM809/TCM810 3-Pin Microcontroller Reset Monitors Features General Description • Precision VDD Monitor for 2.5V, 3.0V, 3.3V, 5.0V The TCM809 and TCM810 are cost-effective system Nominal System Voltage Supplies supervisor circuits designed to monitor VDD in digital systems and provide a reset signal to the host proces- • 140 msec Minimum RESET Time Out Period sor, when necessary. No external components are • RESET Output to VDD = 1.0V (TCM809) required. • Low Supply Current, 9 µA (typ.) The RESET output is typically driven active within • VDD Transient Immunity 65 µsec of VDD falling through the reset voltage thresh- • Small 3-Pin SC-70 and SOT-23B Packages old. RESET is maintained active for a minimum of • No External Components 140 msec after VDD rises above the reset th