FM809SS3X Datasheet

Supervisory Circuits


The FM809SS3X are supervisor circuits that monitor powersupply or other system voltages and issue reset pulse wheneverthe voltage being monitored is out of tolerance. Once asserted,the reset pulse is guaranteed to be valid for a minimum of140ms (256ms typical). FM809xx offers active low push-pulltype of reset while FM810xx offers active high push-pull type.Several threshold voltages are offered to accommodate 5.0V,3.3V, 3.0V and 2.7V system voltages.The low supply current (typically 2 μA)recommends FM809/810devices for portable designs or wherever power saving isprimary.These devices are offered in space saving 3-pin SOT23 andSC70 packages. FM809SS3X Features • VTHvoltages of 4.63V, 4.38V, 4.00V, 3.08V, 2.93V and 2.63V• RESET (FM809) or RESET (FM810) output• 140ms power-on RESET delay (minimum)• RESET operation guaranteed to 1.0V• Supply current only 2μA• No external components• Operating Range– -40°C to +105°C (SOT23)– -40°C to +85°C (SC70)• SOT23-3 and SC70-3 packages FM809SS3X Applications • Microcontrollers and Microprocessors• Appliances• Power-Supply Monitoring• Portable Equipment• Automotive Systems


[{"Name":"Number of Voltages Monitored: ","Value":"1"},{"Name":"Monitored Voltage: ","Value":"1.6 V to 5.5 V "},{"Name":"Undervoltage Threshold: ","Value":"2.79 V "},{"Name":"Overvoltage Threshold: ","Value":"3 V "},{"Name":"Power-Up Reset Delay (Typ):","Value":"560 ms "},{"Name":"Supply Voltage - Max: ","Value":"5.5 V "},{"Name":"Maximum Operating Temperature:","Value":"+ 105 C"},{"Name":"Maximum Power Dissipation: ","Value":"320 mW"},{"Name":"Minimum Operating Temperature: ","Value":"- 40 C "},{"Name":"Supply Voltage - Min: ","Value":"1.1 V "}]

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