MAX6412MAX6420 Low-PowerLow-Power, Single/Dual-V, Single/Dual-Voltage P Reset Ciroltage P Reset Circuitscuits with Capacitorwith Capacitor-Adjustable Reset Timeout Delay-Adjustable Reset Timeout Delay General Description Features The MAX6412MAX6420 low-power microprocessor Monitor System Voltages from 1.6V to 5V supervisor circuits monitor system voltages from 1.6V to Capacitor-Adjustable Reset Timeout Period 5V. These devices are designed to assert a reset signal whenever the V supply voltage or RESET IN falls below CC Manual Reset Input its reset threshold or the manual reset input is asserted. (MAX6412/MAX6413/MAX6414) The reset output remains asserted for the reset timeout Adjustable Reset Input Option (MAX6415MAX6420) period after V and RESET IN rise above the reset CC threshold and the manual reset input is deasserted. The Dual-Voltage Monitoring reset timeout is externally set by a capacitor to provide (MAX6418/MAX6419/MAX6420) more flexibility. Low Quiescent Current (1.7A, typ) The MAX6412/MAX6413/MAX6414 feature fixed thresholds 3 RESET Output Options from 1.575V to 5V in approximately 100mV increments and a manual reset input. The MAX6415/MAX6416/MAX6417 Push-Pull RESET are offered with an adjustable reset input that can monitor Push-Pull RESET voltages down to 1.26V and the MAX6418/MAX6419/ Open-Drain RESET MAX6420 are offered with one fixed input and one Guaranteed Reset Valid to V = 1V CC adjustable input to monitor dual-voltage systems. Power-Supply Transient Immunity The MAX6412/MAX6415/MAX6418 have an active-low, push-pull reset output. The MAX6413/MAX6416/ Small SOT23-5 Packages MAX6419 have an active-high, push-pull reset output and the MAX6414/MAX6417/MAX6420 have an active- Ordering Information low, open-drain reset output. All of these devices are offered in a SOT23-5 package and are fully specified PART TEMP RANGE PIN-PACKAGE from -40C to +125C. MAX6412UK -T -40C to +125C 5 SOT23 Applications MAX6413UK -T -40C to +125C 5 SOT23 Automotive MAX6414UK -T -40C to +125C 5 SOT23 Medical Equipment MAX6415UK-T -40C to +125C 5 SOT23 Intelligent Instruments MAX6416UK-T -40C to +125C 5 SOT23 MAX6417UK-T -40C to +125C 5 SOT23 Portable Equipment MAX6418UK -T -40C to +125C 5 SOT23 Battery-Powered Computers/Controllers MAX6419UK -T -40C to +125C 5 SOT23 Embedded Controllers MAX6420UK -T -40C to +125C 5 SOT23 Critical P Monitoring MAX6420UK /V-T -40C to +125C 5 SOT23 Set-Top Boxes Note: The MAX6412/MAX6413/MAX6414 and MAX6418/ Computers MAX6419/MAX6420 are available with factory-set V reset CC thresholds from 1.575V to 5.0V in approximately 0.1V incre- Pin Configuration ments. Insert the desired nominal reset threshold suffix (from Table 1) into the blanks following the letters UK. There are 33 TOP VIEW standard versions with a required order increment of 2500 pieces. Sample stock is generally held on standard versions RESET/RESET 15 V CC only (see Standard Versions Table). Required order increment is 10,000 pieces for nonstandard versions. Contact factory for MAX6412 MAX6420 availability. All devices are available in tape-and-reel only. GND 2 Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing -T with +T when ordering. RESET IN (MR)34 SRT /V denotes an automotive qualified part. SOT23-5 Selector Guide and Typical Operating Circuit appear at end of data sheet. ( ) FOR THE MAX6412/MAX6413/MAX6414. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-2336 Rev 5 8/12MAX6412MAX6420 Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay ABSOLUTE MAXIMUM RATINGS All Voltages Referenced to GND Operating Temperature Range .........................-40C to +125C V ........................................................................-0.3V to +6.0V Junction Temperature......................................................+150C CC Storage Temperature Range .............................-65C to +150C SRT, MR, RESET IN....................................-0.3V to (V + 0.3V) CC Lead Temperature (soldering, 10s) .................................+300C RESET, RESET (Push-Pull) .........................-0.3V to (V + 0.3V) CC Soldering Temperature (reflow) RESET (Open-Drain) .............................................-0.3V to +6.0V Lead(Pb)-free packages..............................................+260C Input Current (All Pins) .....................................................20mA Packages containing lead (Pb)....................................+240C Output Current (RESET, RESET) ......................................20mA Continuous Power Dissipation (T = +70C) A 5-Pin SOT23 (derate 7.1mW/C above +70C)............571mW 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 = 1V to 5.5V, T = T to T , unless otherwise specified. Typical values are at V = 5V and T = +25C.) (Note 1) CC A MIN MAX CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range V 1.0 5.5 V CC V 5.0V 2.6 4.5 CC Supply Current I V 3.3V 2 3.5 A CC CC V 2.0V 1.7 2.5 CC V - V + TH TH T = +25C A 1.25% 1.25% V Reset Threshold Accuracy V V CC TH V - V + TH TH T = -40C to +125C A 2.5% 2.5% Hysteresis V 4 x V mV HYST TH V to Reset Delay t V falling at 1mV/s 100 s CC RD CC C = 1500pF 3.00 4.375 5.75 SRT Reset Timeout Period t ms RP C = 0F 0.275 SRT V Ramp Current I V = 0 to 0.65V V = 1.6V to 5V 240 nA SRT RAMP SRT CC V Ramp Threshold V V = 1.6V to 5V (V rising) 0.65 V SRT TH-RAMP CC RAMP RAMP Threshold Hysteresis V falling threshold 33 mV RAMP V 1.0V, I = 50A 0.3 CC SINK RESET Output Voltage LOW V V 2.7V, I = 1.2mA 0.3 V OL CC SINK V 4.5V, I = 3.2mA 0.4 CC SINK V 1.8V, I = 200A 0.8 x V CC SOURCE CC RESET Output Voltage HIGH, V V 2.25V, I = 500A 0.8 x V V OH CC SOURCE CC (Push-Pull) V 4.5V, I = 800A 0.8 x V CC SOURCE CC RESET Output Leakage Current, I V > V , reset not asserted 1.0 A LKG CC TH (Open-Drain) V 1.0V, I = 1A 0.8 x V CC SOURCE CC V 1.8V, I = 150A 0.8 x V CC SOURCE CC RESET Output Voltage HIGH V V OH V 2.7V, I = 500A 0.8 x V CC SOURCE CC V 4.5V, I = 800A 0.8 x V CC SOURCE CC 2 Maxim Integrated