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MAX690AC/D Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX690AC/D Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 13 page  General Description The MAX690A/MAX692A/MAX802L/MAX802M/MAX805L reduce the complexity and number of components required for power-supply monitoring and battery- control functions in microprocessor (μP) systems. They significantly improve system reliability and accuracy compared to separate ICs or discrete components. These parts provide four functions: 1) A reset output during power-up, power-down, and brownout conditions. 2) Battery-backup switching for CMOS RAM, CMOS μP, or other low-power logic. 3) A reset pulse if the optional watchdog timer has not been toggled within 1.6s. 4) A 1.25V threshold detector for power-fail warning or low-battery detection, or to monitor a power supply other than +5V. 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 guarantee power-fail accuracies to ±2%. The MAX805L is the same as the MAX690A except that RESET is provided instead of RESET. All parts are available in 8-pin DIP and SO packages. The MAX690A/MAX802L are pin compatible with the MAX690 and MAX694. The MAX692A/MAX802M are pin compatible with the MAX692. Applications ● Battery-Powered Computers and Controllers ● Intelligent Instruments ● Critical μP Power Monitoring Features ● Precision Supply Voltage Monitor: 4.65V for MAX690A/MAX802L/MAX805L 4.40V for MAX692A/MAX802M ● Reset Time Delay: 200ms ● Watchdog Timer: 1.6s Timeout ● Battery-Backup Power Switching ● 200μA Quiescent Supply Current ● 50nA Quiescent Supply Current in Battery- Backup Mode ● Voltage Monitor for Power-Fail or Low-Battery Warning ● Power-Fail Accuracy Guaranteed to ±2% (MAX802L/M) ● Guaranteed RESET Assertion to VCC = 1V ● 8-Pin SO and DIP Packages 19-4333; Rev 5; 4/15 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 and SO packages are available in both leaded and lead(Pb)-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. PART TEMP RANGE PIN-PACKAGE MAX690ACPA 0°C to +70°C 8 Plastic DIP MAX690ACSA 0°C to +70°C 8 SO MAX690AC/D 0°C to +70°C Dice* MAX690AEPA -40°C to +85°C 8 Plastic DIP MAX690AESA -40°C to +85°C 8 SO MAX690AMJA -55°C to +125°C 8 CERDIP** VCC VCC NMI I/O LINE GND GND BUS CMOS RAM UNREGULATED DC REGULATED +5V RESET PFO WDI VOUT GND VBATT VCC PFI R1 R2 0.1µF 3.6V LITHIUM BATTERY MAX690A MAX802L µP RESET MAX690A/MAX692A/ MAX802L/MAX802M/ MAX805L Microprocessor Supervisory Circuits Typical Operating Circuit Pin Configurations Ordering Information 1 2 3 4 8 7 6 5 VBATT RESET (RESET) WDI PFO PFI GND VCC VOUT DIP/SO TOP VIEW MAX690A MAX692A MAX802L MAX802M MAX805L ( ) ARE FOR MAX805L ONLY. |
Similar Part No. - MAX690AC/D |
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Similar Description - MAX690AC/D |
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