MAX690A/MAX692A/ Microprocessor Supervisory Circuits MAX802L/MAX802M/ MAX805L General Description Features The MAX690A/MAX692A/MAX802L/MAX802M/MAX805L Precision Supply Voltage Monitor: reduce the complexity and number of components 4.65V for MAX690A/MAX802L/MAX805L required for power-supply monitoring and battery- 4.40V for MAX692A/MAX802M control functions in microprocessor (P) systems. They Reset Time Delay: 200ms significantly improve system reliability and accuracy Watchdog Timer: 1.6s Timeout compared to separate ICs or discrete components. Battery-Backup Power Switching These parts provide four functions: 200A Quiescent Supply Current 1) A reset output during power-up, power-down, and 50nA Quiescent Supply Current in Battery- brownout conditions. Backup Mode 2) Battery-backup switching for CMOS RAM, CMOS P, Voltage Monitor for Power-Fail or Low-Battery or other low-power logic. Warning 3) A reset pulse if the optional watchdog timer has not Power-Fail Accuracy Guaranteed to 2% been toggled within 1.6s. (MAX802L/M) 4) A 1.25V threshold detector for power-fail warning or Guaranteed RESET Assertion to V = 1V CC low-battery detection, or to monitor a power supply 8-Pin SO and DIP Packages other than +5V. Ordering Information The parts differ in their reset-voltage threshold levels and reset outputs. The MAX690A/MAX802L/MAX805L generate PART TEMP RANGE PIN-PACKAGE a reset pulse when the supply voltage drops below 4.65V, MAX690ACPA 0C to +70C 8 Plastic DIP and the MAX692A/MAX802M generate a reset below 4.40V. MAX690ACSA 0C to +70C 8 SO The MAX802L/MAX802M guarantee power-fail accuracies MAX690AC/D 0C to +70C Dice* to 2%. The MAX805L is the same as the MAX690A except that RESET is provided instead of RESET. MAX690AEPA -40C to +85C 8 Plastic DIP All parts are available in 8-pin DIP and SO packages. MAX690AESA -40C to +85C 8 SO The MAX690A/MAX802L are pin compatible with the MAX690AMJA -55C to +125C 8 CERDIP** MAX690 and MAX694. The MAX692A/MAX802M are pin Ordering Information continued at end of data sheet. compatible with the MAX692. *Dice are specified at T = +25C A **Contact factory for availability and processing to MIL STD- Applications 883. Devices in PDIP and SO packages are available in both Battery-Powered Computers and Controllers leaded and lead(Pb)-free packaging. Specify lead free by Intelligent Instruments adding the + symbol at the end of the part number when Critical P Power Monitoring ordering. Lead free not available for CERDIP package. Typical Operating Circuit Pin Configurations UNREGULATED REGULATED +5V DC V CC TOP VIEW 0.1F V CC RESET RESET R 1 P V OUT 1 8 VBATT MAX690A PFO NMI MAX690A PFI MAX692A V 2 CC 7 RESET (RESET) MAX802L WDI I/O LINE GND MAX802L GND V 3 R BATT MAX802M 6 WDI 2 3.6V V OUT BUS MAX805L LITHIUM GND PFI 4 5 PFO BATTERY V CC CMOS RAM DIP/SO GND ( ) ARE FOR MAX805L ONLY. 19-4333 Rev 5 4/15MAX690A/MAX692A/ Microprocessor Supervisory Circuits MAX802L/MAX802M/ MAX805L Absolute Maximum Ratings Terminal Voltage (with respect to GND) Rate of Rise, V , V ..............................................100V/s CC BATT V ...................................................................-0.3V to +6.0V Continuous Power Dissipation CC V ...............................................................-0.3V to +6.0V Plastic DIP (derate 9.09mW/C above +70C) ............727mW BATT All Other Inputs (Note 1) .......................... -0.3V to (V + 0.3V) SO (derate 5.88mW/C above +70C) ....................... 471mW CC Input Current CERDIP (derate 8.00mW/C above +70C) ................640mW V ...............................................................................200mA Operating Temperature Ranges: CC V .............................................................................50mA MAX69 AC , MAX80 C ........................0C to +70C BATT GND ................................................................................20mA MAX69 AE , MAX80 E ................... -40C to +85C Output Current MAX69 AMJA, MAX805LMJA ..................... -55C to +125C V .............................. Short-Circuit Protected for up to 10s Storage Temperature Range ............................ -65C to +160C OUT All Other Outputs ............................................................20mA Lead Temperature (soldering, 10s) ................................ +300C Note 1: The input voltage limits on PFI and WDI may be exceeded if the current into these pins is limited to less than 10mA. 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 = 4.75V to 5.5V for MAX690A/MAX802L/MAX805L, V = 4.5V to 5.5V for MAX692A/MAX802M, V = 2.8V, T = T to CC CC BATT A MIN T , unless otherwise noted.) MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX69 AC, MAX802 C 1.0 5.5 Operating Voltage Range, MAX805LC 1.1 5.5 V V , V (Note 2) CC BATT MAX69 AE/M, MAX80 E 1.2 5.5 MAX69 AC, MAX802 C 200 350 Supply Current (Excluding I ) I A OUT SUPPLY MAX69 AE/M, MAX802 E, MAX805LE/M 200 500 T = +25C 0.05 1.0 I in Battery-Backup V = 0V, A SUPPLY CC A Mode (Excluding I ) V = 2.8V OUT BATT T = T to T 5.0 A MIN MAX T = +25C -0.1 0.02 VBATT Standby Current 5.5V > V > A CC A (Note 3) V +0.2V BATT T = T to T -1.0 0.02 A MIN MAX V V CC CC I = 5mA OUT - 0.05 - 0.025 V Output V OUT V V CC CC I = 50mA OUT - 0. 5 - 0. 25 V V BATT BATT V in Battery-Backup Mode I = 250A, V < V - 0.2V V OUT OUT CC BATT - 0.1 - 0.02 Power-up 20 Battery Switch Threshold, V CC V < V mV CC RT to V BATT Power-down -20 Battery Switchover Hysteresis 40 mV MAX690A, MAX802L, MAX805L 4.50 4.65 4.75 MAX692A, MAX802M 4.25 4.40 4.50 Reset Threshold V V RT MAX802L, T = +25C, V falling 4.55 4.70 A CC MAX802M, T = +25C, V falling 4.30 4.45 A CC Reset Threshold Hysteresis 40 mV Reset Pulse Width t 140 200 280 ms RS Maxim Integrated 2 www.maximintegrated.com