MAX707 Maxim Integrated Products, MAX707 Datasheet
MAX707
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MAX707 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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... 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 PARAMETER Operating Voltage Range Supply Current ...
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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 RESET 0V +5V GND 330pF 10k 0V POWER-FAIL COMPARATOR DE-ASSERTION RESPONSE TIME PFI + + +25°C PFO A +4V 30pF 1k PFO +1.25V 0V PFI +1.20V 0V 400ns/div MAX707 RESET, RESET DE-ASSERTION +25°C A +5V RESET V CC 10k 0V RESET RESET 10k GND 330pF 330pF +5V RESET 0V 400ns/div MAX813L +4V 10k 330pF +4V 2 s/div +3V +1 ...
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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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... WDO 0V MR EXTERNALLY DRIVEN LOW Figure 4. MAX705/MAX706 RESET, MR, and WDO Timing with WDI Three-Stated. The MAX707/MAX708/MAX813L RESET output is the inverse of RESET shown. _______________________________________________________________________________________ To build an early-warning circuit for power failure, con- nect the PFI pin to a voltage divider (see Typical Operating Circuit). Choose the voltage divider ratio so that the voltage at PFI falls below 1.25V just before the +5V regulator drops out. Use PFO to interrupt the µ ...
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Low-Cost, µP Supervisory Circuits MAX70_ RESET Figure 5. RESET Valid to Ground Circuit + MAX70_ PFO PFI R2 RESET GND V- + +5V PFO TRIP 5 1.25 1.25 V TRIP , ...
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... MAX707CSA 0°C to +70°C MAX707CUA 0°C to +70°C MAX707C/D 0°C to +70°C MAX707EPA -40°C to +85°C MAX707ESA -40°C to +85°C MAX707EUA -40°C to +85°C MAX707MJA -55°C to +125°C MAX708CPA 0°C to +70°C MAX708CSA 0°C to +70°C MAX708CUA 0°C to +70°C MAX708C/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 ...