MAX803L/M/R/S/T/Z, MAX809J/L/M/R/S/T/Z, MAX810L/M/R/S/T/Z 19-0344 Rev 6 12/05 3-Pin Microprocessor Reset Circuits General Description Features The MAX803/MAX809/MAX810 are microprocessor (P) Precision Monitoring of +2.5V, +3V, +3.3V, and supervisory circuits used to monitor the power supplies +5V Power-Supply Voltages 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) These circuits perform a single function: they assert a Push-Pull RESET Output (MAX810) reset signal whenever the V supply voltage declines CC 140ms min Power-On Reset Pulse Width below a preset threshold, keeping it asserted for at least 140ms after V has risen above the reset thresh- CC 12A Supply Current old. Reset thresholds suitable for operation with a vari- Guaranteed Reset Valid to V = +1V CC ety of supply voltages are available. Power Supply Transient Immunity The MAX803 has an open-drain output stage, while the No External Components MAX809/MAX810 have push-pull outputs. The 3-Pin SC70 and SOT23 Packages MAX803s open-drain RESET output requires a pull-up resistor that can be connected to a voltage higher than Ordering Information V . The MAX803/MAX809 have an active-low RESET CC PART TEMP. RANGE PIN-PACKAGE output, while the MAX810 has an active-high RESET output. The reset comparator is designed to ignore fast MAX803 EXR-T -40C to +125C 3 SC70-3 transients on V , and the outputs are guaranteed to CC MAX803 EXR-T10 -40C to +125C 3 SC70-3 be in the correct logic state for V down to 1V. CC MAX809 EXR-T -40C to +125C 3 SC70-3 Low supply current makes the MAX803/MAX809/ MAX809 EXR-T10 -40C to +125C 3 SC70-3 MAX810 ideal for use in portable equipment. The MAX809 EUR-T -40C to +105C 3 SOT23-3 MAX803 is available in a 3-pin SC70 package, and the MAX809 EUR-T10 -40C to +105C 3 SOT23-3 MAX809/MAX810 are available in 3-pin SC70 or SOT23 MAX810 EXR-T -40C to +125C 3 SC70-3 packages. MAX810 EXR-T10 -40C to +125C 3 SC70-3 Applications MAX810 EUR-T -40C to +105C 3 SOT23-3 MAX810 EUR-T10 -40C to +105C 3 SOT23-3 Computers Controllers Note: These parts are offered in 2.5k or 10k reels, and must be ordered in 2.5k or 10k increments. Order MAX803 EXR-T for Intelligent Instruments 2.5k reels and MAX803 EXR-T10 for 10k reels. Insert the Critical P and C Power Monitoring desired suffix letter from the Selector Guide into the blank to Portable/Battery-Powered Equipment complete the part number. All versions of these products may not be available at the time of announcement. Contact factory for Automotive availability. Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing -T with +T when ordering. Typical Operating Circuit Pin Configuration TOP VIEW V CC V V CC GND 1 CC R * PULL-UP MAX803 P MAX803 MAX809 MAX809 V 3 CC RESET RESET MAX810 INPUT RESET (RESET) 2 GND GND SC70-3/SOT23-3 ( ) ARE FOR MAX810. *MAX803 ONLY MAX803 AVAILABLE IN SC70-3 ONLY. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.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 3-Pin SOT23 (derate 4mW/C above +70C)...............320mW RESET, RESET (push-pull) .....................-0.3V to (V + 0.3V) 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 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 V T = -40C to +105C (MAX8 EUR) 1.2 5.5 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 MAX803L/M/R/S/T/Z, MAX809J/L/M/R/S/T/Z, MAX810L/M/R/S/T/Z