MAX705MAX708/MAX813L Low-Cost, P Supervisory Circuits General Description Features The MAX705-MAX708/MAX813L microprocessor (P) Available in Tiny MAX Package supervisory circuits reduce the complexity and number Guaranteed RESET Valid at V = 1V CC of components required to monitor power-supply and Precision Supply-Voltage Monitor battery functions in P systems. These devices signifi- 4.65V in MAX705/MAX707/MAX813L cantly improve system reliability and accuracy com- 4.40V in MAX706/MAX708 pared to separate ICs or discrete components. 200ms Reset Pulse Width The MAX705/MAX706/MAX813L provide four functions: Debounced TTL/CMOS-Compatible 1) A reset output during power-up, power-down, and Manual-Reset Input brownout conditions. Independent Watchdog Timer1.6s Timeout 2) An independent watchdog output that goes low if (MAX705/MAX706) the watchdog input has not been toggled within 1.6 seconds. Active-High Reset Output (MAX707/MAX708/MAX813L) 3) A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power sup- Voltage Monitor for Power-Fail or Low-Battery ply other than +5V. Warning 4) An active-low manual-reset input. The MAX707/MAX708 are the same as the MAX705/ Ordering Information MAX706, except an active-high reset is substituted for the watchdog timer. The MAX813L is the same as the PART TEMP RANGE PIN-PACKAGE MAX705, except RESET is provided instead of RESET. MAX705CPA 0C to +70C 8 Plastic DIP Two supply-voltage monitor levels are available: The MAX705CSA 0C to +70C 8 SO MAX705/MAX707/MAX813L generate a reset pulse when MAX705CUA 0C to +70C 8 MAX the supply voltage drops below 4.65V, while the MAX705C/D 0C to +70C Dice* MAX706/MAX708 generate a reset pulse below 4.40V. All four parts are available in 8-pin DIP, SO and MAX Ordering Information continued at end of data sheet. * Dice are specified at T = +25C. packages. A **Contact factory for availability and processing to MIL-STD-883. Applications Devices in PDIP, SO and MAX packages are available in both Computers leaded and lead-free packaging. Specify lead free by adding the + symbol at the end of the part number when ordering. Controllers Lead-free not available for CERDIP package. Intelligent Instruments Pin Configurations Automotive Systems Critical P Power Monitoring TOP VIEW MAX is a registered trademark of Maxim Integrated Products, Inc. MR 1 8 WDO MAX705 V 2 CC 7 RESET (RESET) Typical Operating Circuit MAX706 GND 3 MAX813L WDI 6 PFI 4 5 PFO UNREGULATED DC MAX667 DIP/SO +5V DC LINEAR REGULATOR P MR 1 8 RESET V CC V 2 CC 7 RESET V CC RESET RESET MAX707 PFI I/O LINE GND 3 MAX708 PFI 6 N.C. MAX705 WDO NMI PFI 4 MAX706 5 PFO INTERRUPT MR PFO MAX813L PUSHBUTTON DIP/SO SWITCH ( ) ARE FOR MAX813L ONLY. Pin Configurations continued at end of data sheet. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-4334 Rev. 9 1/13MAX705MAX708/MAX813L Low-Cost, P Supervisory Circuits ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) CERDIP (derate 8.00mW/C above +70C) .......... 640mW V .............................................. -0.3V to 6.0V Operating Temperature Ranges CC All Other Inputs (Note 1) ............... -0.3V to (V + 0.3V) MAX70 C , MAX813LC .................... 0C to +70C CC Input Current MAX70 E , MAX813LE ................... -40C to +85C V ...................................................... 20mA MAX70 MJA ................................ -55C to +125C CC GND .................................................... 20mA Storage Temperature Range ................ -65C to +160C Output Current (all outputs) ............................. 20mA Lead Temperature (soldering, 10s) ................... +300C Continuous Power Dissipation (T = +70C) Soldering Temperature (reflow) A Plastic DIP (derate 9.09mW/C above +70C) ....... 727mW Lead(Pb)-free.................................................................+260C SO (derate 5.88mW/C above +70C) ............... 471mW Containing Lead(Pb)......................................................+240C MAX (derate 4.10mW/C above +70C) ............ 330mW Note 1: The input voltage limits on PFI and MR can be exceeded if the input current is less than 10mA. Stresses beyond those listed underAbsolute Maximum Rating 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 MAX705/MAX707/MAX813L, V = 4.5V to 5.5V for MAX706/MAX708, T = T to T , unless otherwise noted.) CC CC A MIN MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX70 C 1.0 5.5 Operating Voltage Range V MAX813LC 1.1 5.5 V CC MAX70 E/M, MAX813LE/M 1.2 5.5 MAX705C, MAX706C, MAX813LC 150 350 MAX705E/M, MAX706E/M, MAX813LE/M 150 500 Supply Current I A SUPPLY MAX707C, MAX708C 50 350 MAX707E/M, MAX708E/M 50 500 MAX705, MAX707, MAX813L 4.50 4.65 4.75 Reset Threshold (Note 2) V V RT MAX706, MAX708 4.25 4.40 4.50 Reset Threshold Hysteresis (Note 2) 40 mV Reset Pulse Width (Note 2) t 140 200 280 ms RS I = 800A V - 1.5 SOURCE CC I = 3.2mA 0.4 SINK RESET Output Voltage V MAX70 C, V = 1V, I = 50A 0.3 CC SINK MAX70 E/M, V = 1.2V, I = 100A 0.3 CC SINK MAX707, MAX708, I = 800A V - 1.5 SOURCE CC MAX707, MAX708, I = 1.2mA 0.4 SINK MAX813LC, I = 4A, V = 1.1V 0.8 SOURCE CC RESET Output Voltage V MAX813LE/M, I = 4A, V = 1.2V 0.9 SOURCE CC I = 800A V - 1.5 SOURCE CC MAX813L I = 3.2mA 0.4 SINK Watchdog Timeout Period t MAX705, MAX706, MAX813L 1.00 1.60 2.25 s WD WDI Pulse Width t V = 0.4V, V = (V ) (0.8) 50 ns WP IL IH CC Low 0.8 MAX705, MAX706, MAX813L, WDI Input Threshold V High V = 5V 3.5 CC MAX705, MAX706, MAX813L, WDI = V 50 150 CC WDI Input Current A MAX705, MAX706, MAX813L, WDI = 0V -150 -50 MAX705, MAX706, MAX813L, V - 1.5 CC I = 800A SOURCE WDO Output Voltage V MAX705, MAX706, MAX813L, 0.4 I = 1.2mA SINK 2 Maxim Integrated