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FM809RS3X 데이터시트(PDF) 1 Page - Fairchild Semiconductor |
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1 / 9 page ©2005 Fairchild Semiconductor Corporation 1 www.fairchildsemi.com August 2005 FM809/810 Rev. G FM809/810 3-Pin µC Supervisor Circuits General Description The FM809/810 are supervisor circuits that monitor power supply or other system voltages and issue reset pulse whenever the voltage being monitored is out of tolerance. Once asserted, the reset pulse is guaranteed to be valid for a minimum of 140ms (256ms typical). FM809xx offers active low push-pull type 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 FM809/810 devices for portable designs or wherever power saving is primary. These devices are offered in space saving 3-pin SOT23 and SC70 packages. Features ■ VTH voltages 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 Applications ■ Microcontrollers and Microprocessors ■ Appliances ■ Power-Supply Monitoring ■ Portable Equipment ■ Automotive Systems Typical Operating Circuit Connection Diagram SOT23-3 & SC70-3Packages FM809 µC GND VCC VCC GND RESET I/P RESET VCC 3 GND RESET (809) or RESET (810) 1 2 FM809/810 |
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