MAX690A/MAX692A/ MAX802L/MAX802M/ MAX805L Microprocessor Supervisory Circuits General Description The MAX690A/MAX692A/MAX802L/MAX802M/MAX805L reduce the complexity and number of components required for power-supply monitoring and batterycontrol 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. 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 BatteryBackup 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 Ordering Information PART TEMP RANGE MAX690ACPA 0°C to +70°C 8 Plastic DIP PIN-PACKAGE 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** ●● Battery-Powered Computers and Controllers ●● Intelligent Instruments ●● Critical μP Power Monitoring Ordering Information continued at end of data sheet. *Dice are specified at TA = +25°C **Contact factory for availability and processing to MIL STD883. 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. Typical Operating Circuit Pin Configurations Applications UNREGULATED DC R1 REGULATED +5V VCC 0.1µF VCC PFI R2 3.6V LITHIUM BATTERY 19-4333; Rev 5; 4/15 VBATT RESET MAX690A PFO MAX802L WDI GND TOP VIEW RESET µP NMI I/O LINE GND VOUT BUS VCC CMOS RAM GND VOUT 1 VCC 2 GND 3 PFI 4 MAX690A MAX692A MAX802L MAX802M MAX805L DIP/SO ( ) ARE FOR MAX805L ONLY. 8 VBATT 7 RESET (RESET) 6 WDI 5 PFO




Maxim Integrated




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型式 数量 D/C・lead 備考 選択
MAX692ACSA 466個    
MAX692ACSA 41個    
MAX692ACSA 41個    
MAX692ACSA+ 75個    
MAX692ACSA+ 6個    
MAX692ACSAT 466個    



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