MAX6343:6-Pin µP Reset Circuit with Power-Fail Comparator

The MAX6342-MAX6345 family of microprocessor (µP) supervisory circuits monitors power supplies in digital systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components. The MAX6342-MAX6345 provide factory-trimmed VCC reset threshold voltages from 2.33V to 4.63V and operate with supply voltages between +1V and +5.5V. A +1.25V threshold detector allows for a power-fail warning, for low-battery detection, or for monitoring another power supply. The MAX6342 contains an active-low MR input and an active-low push-pull reset. The MAX6343 and MAX6344 are identical to the MAX6342 except they provide an active-low, open-drain reset and an active-high, push-pull reset, respectively. The MAX6345 provides a second reset output in place of the active-low MR input to give it an active-high push-pull reset and an active-low push-pull reset. All of the devices are packaged in a miniature 6-pin SOT23.

Key Features
  • Small 6-Pin SOT23 Package
  • Precision Factory-Set VCC Reset Thresholds Between 2.33V and 4.63V
  • Guaranteed Active-Low RESET Valid to VCC = +1V
  • 100ms min Reset Pulse Width
  • Debounced CMOS-Compatible Manual-Reset Input
  • Voltage Monitor for Power-Fail or Low-Battery Warning
MAX6342, MAX6343, MAX6344, MAX6345: Typical Operating Circuit
MAX6342, MAX6343, MAX6344, MAX6345: Typical Operating Circuit
Applications/Uses
  • Embedded Control Systems
  • Multivoltage Systems
  • Network Equipment
  • Portable Battery-Powered Equipment
  • Portable Computing
  • Telecom Equipment
DataSheet
titleDownload file
MAX6342-MAX6345 Data SheetMAX6342-MAX6345.pdf
Parametrics
Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureSupervisor FeaturesReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX63421.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active Low
Push-Pull
85ms to 300msNo WatchdogAdjustable Reset Input
Manual Reset
Power Fail Comparator/Low Battery Detect
1.540SOT/6$1.46 @1k
MAX6343Active Low
Open Drain
SOT/6$1.42 @1k
MAX6344Active High
Push-Pull
SOT/6$1.65 @1k
MAX6345Active High
Active Low
Push-Pull
SOT/6$1.42 @1k
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6343LUT+ActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX6343LUT+TActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX6343LUT-TNo Longer AvailableMAX6343LUT+TSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6343MUT+ActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX6343MUT+TActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX6343MUT-TNo Longer AvailableMAX6343MUT+TSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6343RUT+ActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX6343RUT+TActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX6343RUT-TNo Longer AvailableMAX6343RUT+TSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6343SUT+ActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6343SUT+TActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX6343SUT-TNo Longer AvailableMAX6343SUT+TSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6343TUT+ActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX6343TUT+TActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX6343TUT-TNo Longer AvailableMAX6343TUT+TSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6343ZUT+ActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX6343ZUT+TActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX6343ZUT-TNo Longer AvailableMAX6343ZUT+TSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6342-MAX6345.pdf MAX6345
Keep the Product Working—Microprocessor Supervisors Offer Big Insurance in Small Packages MAX16053
MAX6343.pdf MAX6343
MAX6342-MAX6345.pdf MAX6345