MAX708 Maxim Integrated Products, MAX708 Datasheet
MAX708
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MAX708 Summary of contents
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... A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power sup- ply other than +5V 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. ...
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... CERDIP (derate 8.00mW/°C above +70° 640mW CC Operating Temperature Ranges MAX70_C__, MAX813LC__ . . . . . . . . . . . . . . . . . . . . 0°C to +70°C MAX70_E__, MAX813LE__ . . . . . . . . . . . . . . . . . . . -40°C to +85°C MAX70_MJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55°C to +125°C Storage Temperature Range . . . . . . . . . . . . . . . . -65°C to +160°C Lead Temperature (soldering, 10sec +300°C = 4.5V to 5.5V for MAX706/MAX708 SYMBOL CONDITIONS MAX70_C V MAX813LC CC ...
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... MAX705/MAX707/MAX813L PARAMETER MR Pull-Up Current MR Pulse Width Low MR Input Threshold High MR to Reset Out Delay (Note 2) PFI Input Threshold PFI Input Current PFO Output Voltage Note 2: Applies to both RESET in the MAX705-MAX708 and RESET in the MAX707/MAX708/MAX813L. _______________________________________________________________________________________ = 4.5V to 5.5V for MAX706/MAX708 SYMBOL CONDITIONS ...
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... CC 2k RESET RESET RESET 330pF GND 0V 500ms/div POWER-FAIL COMPARATOR ASSERTION RESPONSE TIME +5V +5V PFO PFI 1k PFO 30pF +1.25V 0V +1.30V V = +5V CC PFI T = +25°C A +1.20V 400ns/div MAX707/MAX708/MAX813L RESET OUTPUT VOLTAGE vs. SUPPLY VOLTAGE RESET GND RESET 0V 500ms/div 4 _______________________________________________________________________________________ MAX705/MAX707 RESET RESPONSE TIME + +25° ...
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... Low-Cost, µP Supervisory Circuits ______________________________________________________________Pin Description PIN MAX705/MAX706 MAX707/MAX708 DIP/SO µMAX DIP/SO µMAX _______________________________________________________________________________________ MAX813L NAME DIP/SO µMAX Manual-Reset Input triggers a reset pulse when pulled below 0.8V. This active-low input has an inter nal 250µA pull-up current. It can be driven from a TTL or CMOS logic line as well as shorted to ground with a switch ...
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... The MAX705/MAX706 have a watchdog timer and a falls CC RESET output. The MAX707/MAX708 have both active- high and active-low reset outputs. The MAX813L has both an active-high reset output and a watchdog timer. The manual-reset input (MR) allows reset to be trig- gered by a pushbutton switch ...
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... MR tors and transistor as shown, a high PFO triggers reset. As long as PFO remains high, the MAX705- MAX708/MAX813L will keep reset asserted (RESET = low, RESET = high). Note that this circuit’s accuracy depends on the PFI threshold tolerance, the V and the resistors. Ensuring a Valid RESET ...
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... Figure 8. Interfacing to µPs with Bidirectional Reset I µPs with bidirectional reset pins, such as the Motorola 68HC11 series, can contend with the MAX705-MAX708 RESET output. If, for example, the RESET output is driven high and the µP wants to pull it low, indeterminate logic levels may result. To correct this, connect a 4.7k resistor between the RESET output and the µ ...
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... MAX708CSA 0°C to +70°C MAX708CUA 0°C to +70°C MAX708C/D 0°C to +70°C MAX708EPA -40°C to +85°C MAX708ESA -40°C to +85°C MAX708EUA -40°C to +85°C MAX708MJA -55°C to +125°C MAX813LCPA 0°C to +70°C MAX813LCSA 0°C to +70°C MAX813LCUA 0°C to +70°C MAX813LC/D 0° ...
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Low-Cost, µP Supervisory Circuits _______________________________________________________Package Information ______________________________________________________________________________________ C 0.101mm 0.004 in L 8-PIN MAX MICROMAX SMALL-OUTLINE PACKAGE INCHES MILLIMETERS DIM MIN MAX MIN MAX A 0.036 0.044 0.91 1.11 A1 0.004 0.008 ...
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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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...