SP810 -3 Pin Microprocessor Reset CircuitThe SP809 SP810 are low power Microprocessor () Supervisory Circuits used to monitor
power supplies in and digital systems. They provide applications with benefits of circuit
reliability and low cost by eliminating external components. If the V supply voltage falls below
CC
preset threshold then a reset signal is asserted for at least 140ms after V has risen above the
CC
reset threshold. Both the SP809 and SP810 were designed with a reset Comparator to help
identify invalid signals, which last less than 140ms. The only difference between them is that they
have an active-low RESET output and active-high RESET output, respectively. Low supply
current (1) makes SP809 SP810 ideal for portable equipment. The devices are available in
3 pin SOT-23 package. By Exar Corporation
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