-
2022-09-24 23:33:15
LM809-3 pin microprocessor reset circuit
The LM809/810 microprocessor monitoring circuit can be used to monitor the power supply digital system of the microprocessor. They provide a microprocessor reset during power-up, power-down and brown-out conditions. The function of the LM809/810 is to monitor the VCC supply voltage and when the reset signal is asserted, this voltage falls below the factory programmed reset threshold. After VCC rises, the reset signal is still valid within 240ms and exceeds the threshold. The LM809 has an active-low reset output, while the LM810 has an active-high reset output. Seven standard reset voltages are available, suitable for monitoring 5V, 3.3V and 3V supply voltages. With low supply current of only 15µA, the LM809/810 are ideal for use in portable equipment. The LM809/LM810 are available in 3-pin SOT23 package and 6-pin LLP package.
application
* Microprocessor system
* computer
* controller
* Smart instrument
* Portable/battery powered devices
* car