MAX808NCSA Maxim Integrated Products, MAX808NCSA Datasheet
MAX808NCSA
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... RESET MAX808 OUT GND ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracy ____________________________Features ♦ Precision Voltage Monitoring, ±1.5% Reset Accuracy ♦ ...
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... Supervisory Circuits with ±1.5% Reset Accuracy ABSOLUTE MAXIMUM RATINGS Input Voltage (with respect to GND) V .......................................................................-0. ....................................................................-0.3V to +6V BATT All Other Pins........................................-0. Input Current V Peak ..........................................................................1. Continuous ............................................................500mA CC I Peak.....................................................................250mA BATT I Continuous ............................................................50mA BATT GND ................................................................................50mA All Other Inputs ...............................................................50mA Output Current OUT Peak ...
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... WATCHDOG TIMER (MAX801) Watchdog Timeout Period t WD Minimum Watchdog Input Pulse Width V WDI Threshold Voltage IH (Note WDI Input Current _______________________________________________________________________________________ 8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracy = 4.5V to 5.5V for the MAX80_N and T = +25°C, unless otherwise noted CONDITIONS MAX80_L V rising CC MAX80_N ...
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... Supervisory Circuits with ±1.5% Reset Accuracy ELECTRICAL CHARACTERISTICS (continued 4.6V to 5.5V for the MAX80_L Typical values are MIN MAX PARAMETER SYMBOL CHIP-ENABLE GATING (MAX808) CHIP-ENABLE GATING (MAX808 Leakage Current OUT Resistance (Note 5) CE OUT Short-Circuit Current (RESET Active OUT ...
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... LOWLINE THRESHOLD vs. TEMPERATURE (V RISING) CC 4.80 MAX80_L 4.75 4.70 MAX80_N 4.65 4.60 4.55 MAX80_M 4.50 4.45 4.40 -60 -40 - 100 120 TEMPERATURE (°C) _______________________________________________________________________________________ 8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracy BATT to OUT ON-RESISTANCE vs. TEMPERATURE 10mA OUT BATT 15 V BATT 10 V BATT 5 -60 -40 - ...
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... Supervisory Circuits with ±1.5% Reset Accuracy ____________________________Typical Operating Characteristics (continued 5V 2.8V, no load +25°C, unless otherwise noted.) CC BATT A BATTERY CURRENT vs. INPUT SUPPLY VOLTAGE 2.5 2.6 2.7 2 OUT VOLTAGE vs. CC OUTPUT CURRENT 1000 SLOPE = 1.0Ω 100 (mA) OUT ______________________________________________________________Pin Description ...
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... GND CE IN Figure 1. Functional Diagram _______________________________________________________________________________________ 8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracy FUNCTION Active-High Reset Output. RESET is the inverse of RESET CMOS output that sources and sinks current. RESET swings between V Chip-Enable Output. Output to the chip-enable gating circuit. CE OUT is pulled up to ...
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... Supervisory Circuits with ±1.5% Reset Accuracy V V RST LOWLINE RESET V RESET t RP (MAX801 OUT (MAX808) V BATT SHOWN FOR 5V 2.8V GND CC BATT Figure 2a. Timing Diagram, V Rising CC _______________Detailed Description The MAX801/MAX808 microprocessor (µP) supervisory circuits provide power-supply monitoring and backup- battery switchover in µP systems. The MAX801 also provides program-execution watchdog functions (Figure 1) ...
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... Figure 4 shows the two series pass elements (between the BATT input and OUT) that facilitate UL recognition. V can exceed V BATT normal operation without causing a reset. _______________________________________________________________________________________ 8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracy TO μP NMI V CC BATT Figure 4. V Table 1. Input and Output Status in ...
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... Supervisory Circuits with ±1.5% Reset Accuracy MAX801 Watchdog Timer The watchdog monitors the µP’s activity. If the µP does not toggle the watchdog input (WDI) within 1.6sec, reset asserts for the reset timeout period. The internal 1.6sec timer is cleared when reset asserts or when a transition (low-to-high or high-to-low) occurs at WDI while reset is not asserted ...
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... V BATT increasing. This hysteresis allows use SuperCap (e.g., around 0.47F) and a simple charging ______________________________________________________________________________________ 8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracy 50pF C LOAD Figure 8. Using the MAX801/MAX808 with a SuperCap Chip-Enable Output circuit as a backup source (Figure 8). Since V exceed V special precautions are needed when using these µ ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are 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 © 2005 Maxim Integrated Products Fall Time CC Figure 9 ...