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MAX824ZEXK Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MAX824ZEXK Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 14 page MAX823/4/5 Voltage Supervisor with Watchdog Timer and Manual Reset Revision 1.0 Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com January 14, 2014 Revision 1.0 General Description The MAX823/4/5 voltage supervisory circuits combine low-current, manual reset input, watchdog timer, active- high and active-low push-pull outputs. The reset outputs are asserted and held when the supply voltage falls below the factory-programmed threshold voltage, when the /MR pin is pulled low, or if the watchdog times out. Reset is asserted for the reset timeout delay after the supply voltage increases above the rising threshold voltage or when manual reset input is asserted high. The MAX823/4/5 features an integrated pull-up resistor on the /MR pin. An active-low push-pull reset output (/RESET) and an active-high reset output (RESET) provide flexibility when interfacing with various microcontrollers, PMICs, or load switches. The watchdog input can be left unconnected for applications that do not require watchdog monitoring. The MAX823/4/5 consumes a quiescent current of only 3.8µA and is offered in standard SOT23-5 and SC70-5 packages. It is rated for the –40°C to +125°C temperature range. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. Features Precision 1.665V to 4.625V power supply monitor ±0.5% threshold accuracy at TA = +25°C ±1.5% threshold accuracy from TA = –40°C to +125°C 3.8µA supply current (S,R,T,W,Y,Z options) 4.8µA supply current (L,M options) Manual reset input (MAX823/5) 140ms (min.) reset timeout period 1.6s (typ.) watchdog timeout period Active-high and active-low push-pull outputs Guaranteed reset output valid to VCC = 1V 40°C to +125°C junction temperature range 5-pin SOT23 & SC70 packages 8x lower watchdog input current than competition Applications Computers and Controllers Embedded Controllers Intelligent Instruments Automotive Systems Critical µP Monitoring Portable/ Battery-Powered Equipment Typical Application |
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