MAX700/MAX701/MAX702 Power-Supply Monitor with Reset General Description Features Min 200ms RESET Pulse on Power-Up, Power- The MAX700/MAX701/MAX702 are supervisory circuits Down, and During Low-Voltage Conditions used to monitor the power supplies in microprocessor Reset Threshold Factory Trimmed for +5V Systems (P) and digital systems. The RESET/RESET outputs of the MAX700/MAX701/MAX702 are guaranteed to be in No External Components or Adjustments with the correct state for V voltages down to +1V (Figure 4). +5V-Powered Circuits CC They provide excellent circuit reliability and low cost by Debounced Manual-Reset Input eliminating external components and adjustments when Preset or Adjustable-Voltage Detection (MAX700) used with +5V-powered circuits. Adjustable Hysteresis (MAX700) The MAX702 is the simplest part in the family. When 8-Pin PDIP and Narrow-SO Packages V falls to 4.65V, RESET goes low. The MAX702 also CC Ordering Information provides a debounced manual-reset input. The MAX701 performs the same functions but has both RESET and PART* TEMP RANGE PIN-PACKAGE RESET outputs. Their primary function is to provide a MAX700C/D 0C to +70C Dice system reset. Accordingly, an active reset signal is MAX700CPA 0C to +70C 8 PDIP supplied for low supply voltages and for at least 200ms MAX700CSA 0C to +70C 8 Narrow SO after the supply voltage reaches its operating value. MAX700EPA -40C to +85C 8 PDIP In addition to the features of the MAX701 and MAX702, MAX700ESA -40C to +85C 8 Narrow SO the MAX700 provides preset or adjustable-voltage MAX701C/D 0C to +70C Dice detection so thresholds other than 4.65V can be select- MAX701CPA 0C to +70C 8 PDIP ed, and adjustable hysteresis. All parts are supplied in MAX701CSA 0C to +70C 8 Narrow SO 8-pin PDIP and narrow-SO packages in commercial and MAX701EPA -40C to +85C 8 PDIP extended temperature ranges. MAX701ESA -40C to +85C 8 Narrow SO Applications MAX702C/D 0C to +70C Dice Computers MAX702CPA 0C to +70C 8 PDIP Controllers MAX702CSA 0C to +70C 8 Narrow SO Intelligent Instruments MAX702EPA -40C to +85C 8 PDIP Critical P Power Monitoring MAX702ESA -40C to +85C 8 Narrow SO *Devices in PDIP and SO packages are available in both lead- ed and lead(Pb)-free packaging. Specify lead free by adding the + symbol at the end of the part number when ordering. Pin Configurations TOP VIEW MR 1 8 V MR 1 8 V MR 1 8 N.C. CC CC SENSE 2 7 CTL N.C. 2 7 N.C. V 2 7 RESET CC MAX700 MAX701 MAX702 HYST 3 6 RESET N.C. 3 6 RESET 3 6 N.C. GND GND 4 5 RESET GND 4 5 RESET N.C. 4 5 N.C. DIP/SO DIP/SO DIP/SO 19-2690 Rev 3 5/14MAX700/MAX701/MAX702 Power-Supply Monitor with Reset Absolute Maximum Ratings V .....................................................................-0.3V to +15.5V Rate of Rise, V ..........................................................100V/s CC CC Voltage (with respect to GND) at RESET, RESET, Power Dissipation, Any Package ....................................380mW HYST, CTL, SENSE ........................................... -0.3V to V Storage Temperature Range ............................ -55C to +150C CC Operating Temperature Range Lead Temperature (soldering, 10s) .................................+300C C Suffix ...............................................................0C to +70C E Suffix ........................................................... -40C to +85C 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 = +5V, CTL = GND on MAX700, T = +25C, unless otherwise noted.) CC A PARAMETER CONDITIONS MIN TYP MAX UNITS V Monitor Voltage Range CC T = T to T , CTL = V 3 15 V A MIN MAX CC (MAX700 Only) Min V for Valid Reset Output, CC T = T to T , V 0.4V when sinking 1mA 1.5 1 V A MIN MAX RESET Declining Supply Supply Current 100 200 A Power-up 4.50 4.65 4.75 Reset Threshold T = T to T V A MIN MAX Power-down 4.50 4.62 4.75 Internal Hysteresis HYST not connected 30 mV Reset Output Pulse Width 200 350 500 ms RESET Fall Time MAX700/MAX701 only, C = 100pF 200 ns LOAD No reset 10 1 V Pulse Duration CC 5V to 4V V pulse s CC Guaranteeing Reset 100 10 MR Input Threshold 0.7 V MR Pullup Current -5 -30 A MAX700 I = 3.2mA, V = 5V 0.4 SINK CC RESET Output Low V I = 1.6mA, V = 3V 0.4 SINK CC I = 3.2mA, V = 4.25V V - 0.4 SOURCE CC CC RESET Output High I = 1.6mA, V = 3V V - 0.4 V SOURCE CC CC I = 0.5mA, V = 1.5V V - 0.4 SOURCE CC CC I = 16mA, V = 4.25V 0.4 SINK CC RESET Output Low I = 1.6mA, V = 3V 0.4 V SINK CC I = 0.4mA, V = 1.5V 0.4 SINK CC I = 3.2mA, V = 5V V - 0.4 SOURCE CC CC RESET Output High V I = 1.6mA, V = 3V V - 0.4 SOURCE CC CC Maxim Integrated 2 www.maximintegrated.com