The MAX803/MAX809/MAX810 are microprocessor (P) upervisory circuits used to monitor the power supplies n P and digital systems. They provide excellent circuit eliability and low cost by eliminating external components nd adjustments when used with +5V, +3.3V, 3.0V, or +2.5V powered circuits.
These circuits perform a single function: they assert a eset signal whenever the VCC supply voltage declines elow a preset threshold, keeping it asserted for at east 140ms after VCC has risen above the reset threshold.
Reset thresholds suitable for operation with a variety f supply voltages are available.
The MAX803 has an open-drain output stage, while the AX809/MAX810 have push-pull outputs. The AX803's open-drain RESET output requires a pull-up esistor that can be connected to a voltage higher than CC. The MAX803/MAX809 have an active-low RESEToutput, while the MAX810 has an active-high RESET utput. The reset comparator is designed to ignore fast ransients on VCC, and the outputs are guaranteed to e in the correct logic state for VCC down to 1V.
Low supply current makes the MAX803/MAX809/ AX810 ideal for use in portable equipment. The AX803 is available in a 3-pin SC70 package, and the AX809/MAX810 are available in 3-pin SC70 or SOT23 ackages.
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`Computers`Controllers`Intelligent Instruments`Critical P and C Power Monitoring`Portable/Battery-Powered Equipment`Automotive
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` Precision Monitoring of +2.5V, +3V, +3.3V, and 5V Power-Supply Voltages` Fully Specified Over Temperature` Available in Three Output Configurations pen-DrainRESET Output (MAX803) ush-PullRESET Output (MAX809) ush-Pull RESET Output (MAX810)` 140ms min Power-On Reset Pulse Width` 12A Supply Current` Guaranteed Reset Valid to VCC = +1V` Power Supply Transient Immunity` No External Components` 3-Pin SC70 and SOT23 Packages
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Terminal Voltage (with respect to GND)
VCC..................................................................-0.3V to +6.0V
RESET, RESET (push-pull) .......................-0.3V to (VCC + 0.3V)
RESET (open drain)...........................................-0.3V to +6.0V
Input Current, VCC ........................................................20mA
Output Current, RESET, RESET ......................................20mA
Rate of Rise, VCC .......................................................100V/s
Continuous Power Dissipation (TA = +70)
3-Pin SC70 (derate 2.17mW/ above +70).............174mW
3-Pin SOT23 (derate 4mW/ above +70)................320mW
Operating Temperature Range
3-Pin SC70.....................................................-40 to +125
3-Pin SOT23...................................................-40 to +105
Storage Temperature Range ..........................65 to +150
Lead Temperature (soldering, 10s) .............................+300
Post a Buying Lead
Required Field 
