MAX802 MAXIM [Maxim Integrated Products], MAX802 Datasheet
MAX802
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MAX802 Summary of contents
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... Dice* -40°C to +85°C 8 Plastic DIP -40°C to +85° -55°C to +125°C 8 CERDIP REGULATED +3.3V OR +3.0V 0.1μ RESET (RESET) PFO MAX690T/S/R PFI WDI MAX802T/S/R 3.6V MAX804T/S/R LITHIUM MAX805T/S/R BATTERY V VBATT OUT GND V 0.1μF 0.1μ μP RESET NMI I/O LINE ...
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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 ...
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... VBATT = 2.3V OUT VBATT - > V > 1.75V (Note VBATT > V (Note This value is identical to the reset threshold, V rising CC MAX690T/704T/805T MAX802T/804T/806T MAX690S/704S/805S RST MAX802S/804S/806S MAX690R/704R/805R MAX802R/804R/806S t V < 3. 50µA OH SOURCE 3.3V 1.2mA; SINK V MAX690_/704_/802_/806_ ...
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... MAX704_/MAX806_ only 0V MAX690_/MAX802_/MAX804_/MAX805_ only MAX690_C/E, MAX802_C/E, MAX804_C/E, MAX805_C/E 0V< V < 5.5V CC MAX690_M, MAX802_M, MAX804_M, MAX805_M MAX690/MAX802/MAX804/ V < 3.6V CC MAX805 only MAX690_/MAX802_/MAX804_/MAX805_ only – — — — — – (MAX690_/704_/802_/806_), and RESET (MAX804_/805_) tested at – — — — — – ...
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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 = ...
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... Reset will not occur until V guaranteed to occur before the supply falls below 2.59V (3.0V - 14%). The MAX802R/S/T, MAX804R/S/T, and MAX806R/S/T are respectively similar to the MAX690R/S/T, MAX805R/S/T, and MAX704R/S/T, but with tightened reset and power-fail threshold tolerances. is above the reset threshold, V ...
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... 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 1.6sec, a reset pulse is triggered. The internal 1.6sec timer is cleared by either a reset pulse transition (low-to- high or high-to-low) at WDI ...
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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 ...
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... A 100nF bypass capacitor mounted close to the V — — — – pin provides additional transient immunity output. If, for MAX690T/S 3.3V CC OUT MAX704T/S/R MAX802T/S/R MAX804T/S/R MAX805T/S/R VBATT RESET MAX806T/S/R (RESET) GND ( ) ARE FOR MAX804T/S/R, MAX805T/S/R ONLY – — — — — – ...
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... WHERE V = 1.237V PFT V = 10mV PFH V = DIODE FORWARD VOLTAGE DROP TRIP PFT V 3. MAX690T/S/R PFI PFO MAX704T/S/R MAX802T/S/R R MAX804T/S/R 2 MAX805T/S/R MR MAX806T/S/R GND V V TRIP MAX704T/S/ PFT R 2 MAX806T/S/R ONLY PFT ...
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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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... MAX704_MJA -55°C to +125°C MAX802_CPA 0°C to +70°C MAX802_CSA 0°C to +70°C MAX802_C/D 0°C to +70°C MAX802_EPA -40°C to +85°C MAX802_ESA -40°C to +85°C MAX802_MJA -55°C to +125°C MAX804_CPA 0°C to +70°C MAX804_CSA 0°C to +70°C MAX804_C/D 0°C to +70°C MAX804_EPA -40° ...