MAX806TESA-T Maxim Integrated Products, MAX806TESA-T Datasheet
MAX806TESA-T
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... GND MAX805T/S/R 4 PFI MAX806T/S/R DIP/ ARE FOR MAX804T/S/R, MAX805T/S/R < > ARE FOR MAX704T/S/R, MAX806T/S/R ________________________________________________________________ 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. ____________________________Features – — — — — ♦ ...
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... Microprocessor Supervisory Circuits ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) V .........................................................................-0.3V to 6.0V CC VBATT ....................................................................-0.3V to 6.0V All Other Inputs ...................-0.3V to the higher of V Continuous Input Current V ..................................................................................100mA CC VBATT ...............................................................................18mA GND ..................................................................................18mA Output Current – — — — — – – ...
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... Microprocessor Supervisory Circuits ELECTRICAL CHARACTERISTICS (continued 3.17V to 5.5V for the MAX690T/MAX704T/MAX80_T 5.5V for the MAX690R/MAX704R/MAX80_R; VBATT = 3.6V; T PARAMETER SYMBOL V in Battery-Backup Mode OUT Battery Switch Threshold, V Falling CC Battery Switch Threshold, V Rising (Note 7) CC Reset Threshold (Note 8) V Reset Timeout Period – ...
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... Microprocessor Supervisory Circuits ELECTRICAL CHARACTERISTICS (continued 3.17V to 5.5V for the MAX690T/MAX704T/MAX80_T 5.5V for the MAX690R/MAX704R/MAX80_R; VBATT = 3.6V; T PARAMETER SYMBOL PFI Input Threshold V PFT PFI Input Current PFI Hysteresis, PFI Rising V PFH PFI Input Current V – — – Input Threshold V IL – ...
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... Microprocessor Supervisory Circuits __________________________________________Typical Operating Characteristics (T = +25°C, unless otherwise noted -to-V ON-RESISTANCE CC OUT vs. TEMPERATURE 5 VBATT = –60 –40 – 100 120 TEMPERATURE (°C) BATTERY SUPPLY CURRENT vs. TEMPERATURE 10,000 PFI = GND VBATT = 5V 1000 100 VBATT = VBATT = 2V 0.1 –60 –40 –20 ...
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... Microprocessor Supervisory Circuits ______________________________________________________________Pin Description PIN MAX690 MAX704 MAX804 NAME MAX802 MAX806 MAX805 OUT GND PFI – — — – — 6 WDI – — – — 6 — – — — — — – — — — 7 RESET VBATT _______________Detailed Description A microprocessor’ ...
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... Microprocessor Supervisory Circuits V BATT BATTERY SWITCHOVER CIRCUITRY V CC BATTERY SWITCHOVER COMPARATOR 1.237V RESET COMPARATOR 1.237V * * WATCHDOG WDI TIMER ** MR PFI POWER-FAIL COMPARATOR V PFT * MAX690T/S/R, MAX802T/S/R, MAX804T/S/R, MAX805T/S/R ONLY ** MAX704T/S/R, MAX806T/S/R ONLY ( ) MAX804T/S/R, MAX805T/S/R ONLY Figure 1. Block Diagram (MAX690_/802_/804_/805_) The watchdog circuit monitors the µP’s activity. If the µP does not toggle the watchdog input (WDI) within 1 ...
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... Microprocessor Supervisory Circuits Backup-Battery Switchover In the event of a brownout or power failure, it may be necessary to preserve the contents of RAM. With a backup battery installed at VBATT, the devices auto- matically switch RAM to backup power when V falls. This family of µP supervisors (designed for 3.3V and 3V systems) doesn’ ...
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... Microprocessor Supervisory Circuits 3.0V OR 3.3V MAX690T/S MAX704T/S/R MAX802T/S/R 1N4148 MAX804T/S/R MAX805T/S/R VBATT MAX806T/S/R (RESET) 0.47F GND ARE FOR MAX804T/S/R, MAX805T/S/R ONLY Figure 3. Using a SuperCap as a Backup Power Source Connecting an ordinary signal diode in series with R3, as shown in Figure 4b, causes the lower trip point (V ...
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... Microprocessor Supervisory Circuits MAX690T/S/R PFI MAX704T/S/R MAX802T/S MAX804T/S/R MAX805T/S/R MAX806T/S/R C1* PFO TO μP PFO TRIP ( TRIP PFT PFT PFH – PFT Figure 4. a) Adding Additional Hysteresis to the Power-Fail Comparator MAX690T/S/R PFI MAX704T/S/R MAX802T/S MAX804T/S/R MAX805T/S/R MAX806T/S/R GND PFO TRIP – TRIP ...
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... Microprocessor Supervisory Circuits BUFFERED RESET TO OTHER SYSTEM COMPONENTS V CC MAX690T/S/R 4.7kΩ MAX704T/S/R RESET MAX802T/S/R MAX806T/S/R GND Figure 6. Interfacing to µPs with Bidirectional Reset I/O 100 100 RESET COMPARATOR OVERDRIVE (V Figure 7. Maximum Transient Duration without Causing a Reset Pulse vs. Reset Comparator Overdrive ______________________________________________________________________________________ _Typical Operating Circuits (cont ...
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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 ___________________Chip Topography ...