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LM810M3-3.08 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM810M3-3.08 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 8 page LM809/LM810 3-Pin Microprocessor Reset Circuits General Description The LM809/810 microprocessor supervisory circuits can be used to monitor the power supplies in microprocessor and digital systems. They provide a reset to the microprocessor during power-up, power-down and brown-out conditions. The function of the LM809/810 is to monitor the V CC supply voltage, and assert a reset signal whenever this voltage declines below the factory-programmed reset threshold. The reset signal remains asserted for 240ms after V CC rises above the threshold. The LM809 has an active-low RESET output, while the LM810 has an active-high RESET output. Seven standard reset voltage options are available, suitable for monitoring 5V, 3.3V, and 3V supply voltages. With a low supply current of only 15µA, the LM809/810 are ideal for use in portable equipment. The LM809/LM810 are available in the 3-pin SOT23 package and in the 6-Lead LLP package. Features n Precise monitoring of 3V, 3.3V, and 5V supply voltages n Superior upgrade to MAX809/810 n Fully specified over temperature n 140ms min. Power-On Reset pulse width, 240ms typical Active-low RESET Output (LM809) Active-high RESET Output (LM810) n Guaranteed RESET Output valid for V CC ≥1V n Low Supply Current, 15µA typ. n Power supply transient immunity Applications n Microprocessor Systems n Computers n Controllers n Intelligent Instruments n Portable/Battery-Powered Equipment n Automotive Typical Application Circuit 10105701 Connection Diagrams 10105702 ( ) are for LM810 10105715 Top View See NS package Number LDB06A ( ) are for LM810 September 2002 © 2002 National Semiconductor Corporation DS101057 www.national.com |
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