MAX803/MAX809/MAX810 3-Pin Microprocessor Reset Circuits General Description Features The MAX803/MAX809/MAX810 are microprocessor (P) Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages supervisory circuits used to monitor the power supplies in P and digital systems. They provide excellent circuit Fully Specified Over Temperature reliability and low cost by eliminating external compo- Available in Three Output Configurations nents and adjustments when used with +5V, +3.3V, Open-Drain RESET Output (MAX803) +3.0V, or +2.5V powered circuits. Push-Pull RESET Output (MAX809) Push-Pull RESET Output (MAX810) These circuits perform a single function: they assert a 140ms min Power-On Reset Pulse Width reset signal whenever the V supply voltage declines CC 12A Supply Current below a preset threshold, keeping it asserted for at least 140ms after V has risen above the reset thresh- Guaranteed Reset Valid to V = +1V CC CC old. Reset thresholds suitable for operation with a vari- Power Supply Transient Immunity ety of supply voltages are available. No External Components 3-Pin SC70 and SOT23 Packages The MAX803 has an open-drain output stage, while the MAX809/MAX810 have push-pull outputs. The Ordering Information MAX803s open-drain RESET output requires a pullup resistor that can be connected to a voltage higher than PART TEMP RANGE PIN-PACKAGE V . The MAX803/MAX809 have an active-low RESET CC MAX803 EXR-T -40C to +125C 3 SC70 output, while the MAX810 has an active-high RESET MAX803 EXR+T -40C to +125C 3 SC70 output. The reset comparator is designed to ignore fast MAX803 EXR/V+ -40C to +125C 3 SC70 transients on V , and the outputs are guaranteed to CC be in the correct logic state for V down to 1V. MAX809 EXR-T -40C to +125C 3 SC70 CC MAX809 EXR+T -40C to +125C 3 SC70 Low supply current makes the MAX803/MAX809/ MAX810 ideal for use in portable equipment. The MAX809 EUR-T -40C to +105C 3 SOT23 MAX803 is available in a 3-pin SC70 package, and the MAX809 EUR+T -40C to +105C 3 SOT23 MAX809/MAX810 are available in 3-pin SC70 or SOT23 MAX810 EXR-T -40C to +125C 3 SC70 packages. MAX810 EXR+T -40C to +125C 3 SC70 Applications MAX810 EUR-T -40C to +105C 3 SOT23 Computers MAX810 EUR+T -40C to +105C 3 SOT23 Controllers Note: These parts are offered in 2.5k reels, and must be Intelligent Instruments ordered in 2.5k increments. Insert the desired suffix letter from the Selector Guide into the blank to complete the part number. Critical P and C Power Monitoring All versions of these products may not be available at the time Portable/Battery-Powered Equipment of announcement. Contact factory for availability. Automotive Devices are available in both leaded and lead-free packaging. +Denotes a lead(Pb)-free/RoHS-compliant package. /V denotes an automotive qualified part. Typical Operating Circuit Pin Configuration V CC TOP VIEW V V CC CC GND 1 R * PULLUP MAX803 P MAX803 MAX809 MAX809 3 V CC RESET MAX810 RESET INPUT 2 RESET (RESET) GND GND SC70-3/SOT23-3 ( ) ARE FOR MAX810. *MAX803 ONLY MAX803 AVAILABLE IN SC70-3 ONLY. For pricing, delivery, and ordering information, please contact Maxim Direct 19-0344 Rev 8 12/12 at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com.MAX803/MAX809/MAX810 3-Pin Microprocessor Reset Circuits ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) Continuous Power Dissipation (T = +70C) A V ....................................................................-0.3V to +6.0V 3-Pin SC70 (derate 2.17mW/C above +70C)............174mW CC RESET, RESET (push-pull) .....................-0.3V to (V + 0.3V) 3-Pin SOT23 (derate 4mW/C above +70C)...............320mW CC Operating Temperature Range RESET (open drain)...........................................-0.3V to +6.0V 3-Pin SC70.....................................................-40C to +125C Input Current, V ..............................................................20mA CC 3-Pin SOT23...................................................-40C to +105C Output Current, RESET, RESET ..........................................20mA Storage Temperature Range .............................-65C to +150C Rate of Rise, V ............................................................100V/s CC Lead Temperature (soldering, 10s) .................................+300C Soldering Temperature (reflow) .......................................+260C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = full range, T = -40C to +105C (SOT23) or T = -40C to +125C (SC70), unless otherwise noted. Typical values are at T = CC A A A +25C, V = 5V for L/M/J versions, V = 3.3V for T/S versions, V = 3V for R version, and V = 2.5V for Z version.) (Note 1) CC CC CC CC PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS T = 0C to +70C 1.0 5.5 A V Range T = -40C to +105C (MAX8 EUR) 1.2 5.5 V CC A T = -40C to +125C (MAX8 EXR) 1.2 5.5 A V < 5.5V, MAX8 L/M 24 60 T = -40C CC A to +85C V < 3.6V, MAX8 R/S/T/Z 17 50 CC Supply Current (SOT23) I CC V < 5.5V, MAX8 L/M 100 T = +85C CC A to +105C V < 3.6V, MAX8 R/S/T/Z 100 CC A V < 5.5V, MAX8 L/M 24 35 T = -40C CC A to +85C V < 3.6V, MAX8 R/S/T/Z 17 30 CC Supply Current (SC70) I CC V < 5.5V, MAX8 L/M 60 T = +85C CC A to +125C V < 3.6V, MAX8 R/S/T/Z 60 CC T = +25C 4.56 4.63 4.70 A MAX8 L T = -40C to +85C 4.50 4.75 A T = -40C to +125C 4.40 4.86 A T = +25C 4.31 4.38 4.45 A MAX8 M T = -40C to +85C 4.25 4.50 A T = -40C to +125C 4.16 4.56 A T = +25C 3.93 4.00 4.06 A MAX809J T = -40C to +85C 3.89 4.10 A (SOT only) T = -40C to +125C 3.80 4.20 Reset Threshold A V V TH (SOT only) T = +25C 3.04 3.08 3.11 A MAX8 T T = -40C to +85C 3.00 3.15 A T = -40C to +125C 2.92 3.23 A T = +25C 2.89 2.93 2.96 A MAX8 S T = -40C to +85C 2.85 3.00 A T = -40C to +125C 2.78 3.08 A T = +25C 2.59 2.63 2.66 A MAX8 R T = -40C to +85C 2.55 2.70 A T = -40C to +125C 2.50 2.76 A 2 Maxim Integrated