MAX802M MAXIM [Maxim Integrated Products], MAX802M Datasheet
MAX802M
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MAX802M Summary of contents
Page 1
... The parts differ in their reset-voltage threshold levels and reset outputs. The MAX690A/MAX802L/MAX805L generate a reset pulse when the supply voltage drops below 4.65V, and the MAX692A/MAX802M generate a reset below 4.40V. The MAX802L/MAX802M guaran- tee power-fail accuracies to ±2%. The MAX805L is the same as the MAX690A except that RESET is provided instead of RESET ...
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... Operating Temperature Ranges: MAX69_AC_ _, MAX80_ 0°C to +70°C MAX69_AE_ _, MAX80_ -40°C to +85°C MAX69_AMJA, MAX805LMJA . . . . . . . . . . . . . . . . -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 MAX692A/MAX802M SYMBOL CONDITIONS MAX69_AC, MAX802_C MAX805LC ...
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... CC BATT Note 3: "-" = battery-charging current, "+" = battery-discharging current. Note 4: WDI is guaranteed intermediate, non-logic level state if WDI is floating and V WDI is internally biased to 35 _______________________________________________________________________________________ = 4.5V to 5.5V for MAX692A/MAX802M SYMBOL CONDITIONS MAX805LC 4µA, V SOURCE MAX805LE/ 4µ ...
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Microprocessor Supervisory Circuits __________________________________________Typical Operating Characteristics OUTPUT VOLTAGE vs. LOAD CURRENT 5. + +2.8V BATT 4. +25°C A 4.90 4.85 SLOPE = 5Ω 4.80 4. (mA) ...
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... Reset Output. Whenever RESET is triggered, it pulses low for 200ms. It stays low when V is below the reset threshold (4.65V in the CC RESET MAX690A/MAX802L and 4.4V in the MAX692A/MAX802M) and remains low for 200ms after V rises above the reset threshold. A watchdog CC timeout also triggers RESET. Active-High Reset Output is the inverse of RESET. When RESET is ...
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... A microprocessor’s (µP’s) reset input starts the µ known state. When the µ unknown state, it should be held in reset. The MAX690A/MAX692A/MAX802L/ MAX802M assert reset during power-up and prevent code execution errors during power-down or brownout condi- tions. reaches 1V, RESET is guaran- ...
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... V < BATT RESET THRESHOLD = 4.65V IN MAX690A/MAX802L/MAX805L. RESET THRESHOLD = 4.4V IN MAX692A/MAX802M Figure 3. Backup-Battery Switchover Block Diagram completely separate from the rest of the circuitry. The external voltage divider drives PFI to sense the unregu- lated DC input to the +5V regulator (see Typical Operating Circuit). The voltage-divider ratio can be chosen such that the voltage at PFI falls below 1 ...
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... However, after a long time, the diode leakage current will pull the SuperCap voltage SuperCap with the MAX690A/MAX802L/MAX805L, V may not exceed 4.75V + 0.6V = 5.35V. Use the SuperCap circuit of Figure 5 with a MAX692A or MAX802M and a ±10% supply. This circuit ensures that the SuperCap only charges to V 0.5V. At the maximum V of 5.5V, the SuperCap CC charges up to 5.0V, only 0.5V above the maximum reset threshold— ...
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... PFO µPs with bidirectional reset pins, such as the Motorola 68HC11 MAX690A/MAX692A/MAX802L/MAX802M RESET out- put. If, for example, the RESET output is driven high and the µP wants to pull it low, indeterminate logic lev- els may result. To correct this, connect a 4.7kΩ resis- tor between the RESET output and the µP reset I/ Figure 8 ...
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... Microprocessor Supervisory Circuits BUFFERED RESET TO OTHER SYSTEM COMPONENTS V CC MAX690A 4.7k MAX692A RESET MAX802L MAX802M GND Figure 8. Interfacing to µPs with Bidirectional Reset I/O 10 ______________________________________________________________________________________ V CC RESET GND ...
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Microprocessor Supervisory Circuits ________________________ Minimum Nominal Nominal Reset Reset Pulse Part Threshold Width Number (V) (ms) MAX690A/692A 4.65/4.40 140 MAX691A/693A 4.65/4.40 140/adj. MAX696 Adj. 35/adj. MAX697 Adj. 35/adj. MAX700 4.65/adj. 200 MAX703/704 4.65/4.40 140 MAX705/706 4.65/4.40 140 MAX706P 2.63 140 ...
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... MAX802LEPA -40°C to +85°C MAX802LESA -40°C to +85°C MAX802MCPA 0°C to +70°C MAX802MCSA 0°C to +70°C MAX802MEPA -40°C to +85°C MAX802MESA -40°C to +85°C MAX805LCPA 0°C to +70°C MAX805LCSA 0°C to +70°C MAX805LC/D 0°C to +70°C MAX805LEPA -40°C to +85°C MAX805LESA -40° ...