MAX6303 Maxim Integrated Products, MAX6303 Datasheet
MAX6303
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MAX6303 Summary of contents
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... DIP/SO. ________________________Applications Medical Equipment Embedded Controllers Intelligent Instruments Critical µP Monitoring Portable Equipment Set-Top Boxes Battery-Powered Computers Computers/Controllers _____________________Selector Guide FEATURE MAX6301 MAX6302 MAX6303 MAX6304 Active-Low — Reset Active-High — Reset Open-Drain Reset Output Push/Pull — — Reset Output ...
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... SOURCE MAX6302/MAX6304 1.31V ≥ 4.5V 3.2mA CC SINK 1.6mA CC SINK 50µA, CC SINK T = 0°C to +70°C A MAX6301/ MAX6303 V = 1.2V 100µA, CC SINK T = -40°C to +85° falling at 1mV/µs CC Comparator overdrive = 50mV C = 1500pF SRT MAX6301 RESET CC MAX6302 GND RESET = +70°C) ...
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Low-Power µP Supervisory Circuits ELECTRICAL CHARACTERISTICS (continued +2V to +5.5V MIN MAX PARAMETER SYMBOL WATCHDOG TIMER V WDI, WDS Input Threshold V WDI Pulse Width t WDI, WDS Leakage Current ...
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Low-Power µP Supervisory Circuits with Adjustable Reset/Watchdog ____________________________Typical Operating Characteristics (continued 1500pF +25°C, unless otherwise noted.) SWT SRT A SUPPLY CURRENT vs. SUPPLY VOLTAGE 4.2 RESET DEASSERTED 4.0 NO LOAD 3.8 3.6 3.4 ...
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... WDI or WDS. The watchdog timer is cleared when reset is asserted and restarted after reset deasserts. In the extended watchdog mode (WDS = V driving WDI with a three-stated driver or by leaving WDI unconnected. Open-Drain, Active-Low Reset Output (MAX6301) RESET (MAX6301/3) Push/Pull, Active-Low Reset Output (MAX6303) 7 Open-Drain, Active-High Reset Output (MAX6302) RESET (MAX6302/4) Push/Pull, Active-High Reset Output (MAX6304) ...
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... MAX6304 µP supervisory circuits provide the reset logic to prevent code-execution errors during power- up, power-down, and brownout conditions (see Typical Operating Circuit ). For the MAX6301/MAX6303, RESET changes from high to low whenever the monitored voltage (V below the reset threshold voltage (V remains low as long as V ...
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... Do not leave WDI unconnected in normal mode. _______________________________________________________________________________________ with Adjustable Reset/Watchdog 500 When WDI SRT Figure 3. Calculating the Reset ( Timeout Capacitor Values SWT GND CC MAX6301 SRT MAX6302 MAX6303 SWT MAX6304 C SWT RST SWT 2.67 2. RST SWT t in µ µs WD ...
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... Low-Power µP Supervisory Circuits with Adjustable Reset/Watchdog RESET MAX6301 MAX6302 MAX6303 MAX6304 Figure 4. Monitoring a Voltage Other than V __________Applications Information Selecting the Reset and Watchdog Timeout Capacitor The reset timeout period is adjustable to accommodate a variety of µP applications. Adjust the reset timeout period ( connecting a specific value capacitor between SRT and ground (Figure 3) ...
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... WDI is disabled. In this mode, WDI is a standard CMOS input and leakage current is typically 100pA, regardless of whether WDI is high or low MAX6301 V CC 0.1µF 4.7k GND RESET RESET TO RESET GENERATOR WATCHDOG TIMER MAX6301 MAX6302 MAX6303 TO MODE MAX6304 CONTROL RESET TO OTHER SYSTEM COMPONENTS V CC µP Normal Mode 9 ...
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... CC falls below 1V, RESET/RESET current sink- When V CC ing (sourcing) capabilities decline drastically. In the case of the MAX6303, high-impedance CMOS-logic inputs connected to RESET can drift to undetermined voltages. This presents no problem in most applica- tions, since most µPs and other circuitry do not operate with V below 1V. ...
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... Adjustable Reset/Watchdog __Ordering Information (continued) PART MAX6302CPA MAX6302CSA MAX6302CUA MAX6302EPA MAX6302ESA MAX6303CPA MAX6303CSA MAX6303CUA MAX6303EPA MAX6303ESA MAX6304CPA MAX6304CSA MAX6304CUA MAX6304EPA MAX6304ESA ___________________Chip Information TRANSISTOR COUNT: 580 TEMP. RANGE PIN-PACKAGE 0°C to +70°C 8 Plastic DIP 0°C to +70° 0° ...
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... Maxim reserves the right to change the circuitry and specifications without notice at any time. implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © ...