MAX692A Maxim Integrated Products, MAX692A Datasheet
MAX692A
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MAX692A 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 CONDITIONS MAX69_AC, MAX802_C MAX805LC MAX69_AE/M, MAX80_ _E MAX69_AC, MAX802_C ...
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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 CONDITIONS MAX805LC 4µ 1.1V SOURCE ...
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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 = 5 4.80 4. (mA) ...
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... WDI is three-stated, or WDI sees a rising or falling edge. 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 MAX690A/MAX802L and 4.4V in the MAX692A/MAX802M) and remains RESET low for 200ms after V rises above the reset threshold. A watchdog CC timeout also triggers RESET ...
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... Figure 1. Block Diagram _______________Detailed Description 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. ...
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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 need not be dedicated to this function though 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 ) ...
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... 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 ...
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... Motorola 68HC11 series, 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 RESET MAX802L MAX802M GND Figure 8. Interfacing to µPs with Bidirectional Reset I/O 10 ______________________________________________________________________________________ V CC GND ...
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Microprocessor Supervisory Circuits ________________________ Minimum Nominal Nominal Reset Watchdog Reset Pulse Timeout Part Threshold Width Period Number (V) (ms) (sec) MAX690A/692A 4.65/4.40 140 1.6 MAX691A/693A 4.65/4.40 140/adj. 1.6/adj. MAX696 Adj. 35/adj. 1.6/adj. MAX697 Adj. 35/adj. 1.6/adj. MAX700 4.65/adj. 200 - ...
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... Information (continued) PART TEMP. RANGE MAX692ACPA 0°C to +70°C MAX692ACSA 0°C to +70°C MAX692AC/D 0°C to +70°C MAX692AEPA -40°C to +85°C MAX692AESA -40°C to +85°C MAX692AMJA -55°C to +125°C MAX802LCPA 0°C to +70°C MAX802LCSA 0°C to +70°C MAX802LEPA -40°C to +85°C MAX802LESA -40° ...