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MAX708ESA Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX708ESA Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 12 page 19-4334; Rev. 9; 1/13 MAX705–MAX708/MAX813L Low-Cost, µP Supervisory Circuits For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. TOP VIEW 1 2 3 4 8 7 6 5 WDO RESET (RESET) WDI PFO PFI GND VCC MR DIP/SO MAX705 MAX706 MAX813L 1 2 3 4 8 7 6 5 RESET RESET N.C. PFO PFI GND VCC MR DIP/SO MAX707 MAX708 ( ) ARE FOR MAX813L ONLY. Pin Configurations continued at end of data sheet. _________________Pin Configurations VCC PFI MR PFO WDO RESET UNREGULATED DC PUSHBUTTON SWITCH PFI I/O LINE INTERRUPT µP MAX705 MAX706 MAX813L MAX667 +5V DC LINEAR REGULATOR VCC RESET NMI __________Typical Operating Circuit _______________General Description The MAX705-MAX708/MAX813L microprocessor (µP) supervisory circuits reduce the complexity and number of components required to monitor power-supply and battery functions in µP systems. These devices signifi- cantly improve system reliability and accuracy com- pared to separate ICs or discrete components. The MAX705/MAX706/MAX813L provide four functions: 1) A reset output during power-up, power-down, and brownout conditions. 2) An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6 seconds. 3) A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power sup- ply other than +5V. 4) An active-low manual-reset input. The MAX707/MAX708 are the same as the MAX705/ MAX706, except an active-high reset is substituted for the watchdog timer. The MAX813L is the same as the MAX705, except RESET is provided instead of RESET. Two supply-voltage monitor levels are available: The MAX705/MAX707/MAX813L generate a reset pulse when the supply voltage drops below 4.65V, while the MAX706/MAX708 generate a reset pulse below 4.40V. All four parts are available in 8-pin DIP, SO and µMAX® packages. _______________________Applications Computers Controllers Intelligent Instruments Automotive Systems Critical µP Power Monitoring ___________________________Features o Available in Tiny µMAX Package o Guaranteed RESET Valid at VCC = 1V o Precision Supply-Voltage Monitor 4.65V in MAX705/MAX707/MAX813L 4.40V in MAX706/MAX708 o 200ms Reset Pulse Width o Debounced TTL/CMOS-Compatible Manual-Reset Input o Independent Watchdog Timer—1.6s Timeout (MAX705/MAX706) o Active-High Reset Output (MAX707/MAX708/MAX813L) o Voltage Monitor for Power-Fail or Low-Battery Warning ______________Ordering Information PART TEMP RANGE PIN-PACKAGE MAX705CPA 8 Plastic DIP MAX705CSA 0°C to +70°C 8 SO MAX705C/D 0°C to +70°C Dice* Ordering Information continued at end of data sheet. * Dice are specified at TA = +25°C. ** Contact factory for availability and processing to MIL-STD-883. Devices in PDIP, SO and µMAX packages are available in both leaded and lead-free packaging. Specify lead free by adding the + symbol at the end of the part number when ordering. Lead-free not available for CERDIP package. 0°C to +70°C MAX705CUA 0°C to +70°C 8 µMAX µMAX is a registered trademark of Maxim Integrated Products, Inc. |
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