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MIC810MYC3 Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC810MYC3 Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 6 page April 2005 1 M0450-041405 MIC809/810 MIC809/810 Microprocessor Reset Circuits General Description The MIC809 and MIC810 are inexpensive microprocessor supervisory circuits that monitor power supplies in micro- processor based systems. The function of these devices is to assert a reset if the power supplydropsbelowadesignatedresetthresholdlevel.Several different reset threshold levels are available to accommodate 3V, 3.3V or 5V powered systems. The MIC809 has an active-low /RESET output, while the MIC810 offers an active-high RESEToutput.The reset output is guaranteed to remain asserted for a minimum of 140ms after VCC has risen above the designated reset threshold level. Having a push-pull output stage, the MIC809/810 does not require a pull-up resistor at the output. The MIC809/810 comes in a 3-pin SOT-23 and SC-70 package. The MIC809 is also available with a shorter reset timeout (30ms min.). See the MIC809-5. All support documentation can be found on Micrel’s web site at www.micrel.com. Typical Application VCC RESET µP RESET VCC MIC809 VCC • Precision voltage monitor for 3V, 3.3V or 5V power sup- plies • /RESET remains valid with VCC as low as 1.4V for SOT- 23 packaged part • /RESET remains valid with VCC as low as 1V for SC70 packaged part • Typically less than15µA supply current for SOT-23 pack- aged part • 5µ typical supply current for SC70 packaged part • 140ms minimum reset pulse widths available • Available in 3-pin SOT-23 and SC-70 package Applications • Portable equipment • Intelligent instruments • Critical microprocessor power monitoring • Printers/computers • Controllers Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com |
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