MAX6803:4-Pin, Low-Power µP Reset Circuits with Manual Reset

The MAX6803/MAX6804/MAX6805 microprocessor (µP) supervisory circuits monitor the power supplies in 2.85V to 5.0V µP and digital systems. They increase circuit reliability and reduce cost by eliminating external components and adjustments. They also feature a debounced manual reset input. These devices perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold or whenever manual reset is asserted. Reset remains asserted for a preset timeout period after VCC has risen above the reset threshold or after manual reset is deasserted. The only difference among the three devices is their output. The MAX6804 (push/pull) and MAX6805 (open-drain) have an active-low RESET output, while the MAX6803 (push/pull) has an active-high RESET output. The MAX6803/MAX6804 are guaranteed to be in the correct state for VCC down to 0.7V. The MAX6805 is guaranteed to be in the correct state for VCC down to 1.0V. The reset comparator in these ICs is designed to ignore fast transients on VCC. Reset thresholds are factory-trimmable between 2.63V and 4.80V, in approximately 100mV increments. These devices are available with a 1ms min, 20ms min, or 100ms min reset timeout period. Ideal for space-critical applications, the MAX6803/MAX6804/MAX6805 come packaged in a 4-pin SOT143. For a lower threshold voltage version, see the MAX6335/MAX6336/MAX6337.

Key Features
  • Ultra-Low 0.7V Operating Supply Voltage
  • Low 4.0µA Supply Current
  • Precision Monitoring of 2.85V to 5.0V Power-Supply Voltages
  • Reset Thresholds Available from 2.63V to 4.80V, in Approximately 100mV Increments
  • Debounced Manual Reset Input
  • Fully Specified over Temperature
  • Three Power-On Reset Timeout Periods Available (1ms min, 20ms min, 100ms min)
  • Low Cost
  • Three Available Output Structures: Push/Pull active-low RESET, Push/Pull RESET, Open-Drain active-low RESET
  • Guaranteed RESET/active-low RESET Valid to VCC = 0.7V (MAX6803/MAX6804)
  • Power-Supply Transient Immunity
  • No External Components Required
  • 4-Pin SOT143 Package
  • Pin Compatible with MAX811/MAX812 and MAX6314/MAX6315
MAX6803, MAX6804, MAX6805: Typical Operating Circuit
MAX6803, MAX6804, MAX6805: Typical Operating Circuit
Applications/Uses
  • Computers: Desktop, Workstation, Server
  • Controllers
  • Critical µP and µC Power Monitoring
  • Intelligent Instruments
  • Portable Battery-Powered Equipment
DataSheet
titleDownload file
MAX6803-MAX6805 Data SheetMAX6803-MAX6805.pdf
Parametrics
Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureSupervisor FeaturesICC
(µA)
Package/PinsBudgetary
Price
minmaxSee Notes
MAX68032.5 to 3.3
3.3 to 5.5
Active High
Push-Pull
1ms to 15ms
15ms to 85ms
85ms to 300ms
No WatchdogManual Reset12SOT/4$2.28 @1k
MAX6804Active Low
Push-Pull
SOT/4$1.38 @1k
MAX6805Active Low
Open Drain
SOT/4$1.43 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6803US26D1+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US26D1-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US26D2+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US26D2-TNo Longer AvailableMAX6803US26D2+TSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US26D3+TActiveSOT,;4 pin;8 mm²-40°C to +125°CLead Free
MAX6803US26D3-TNo Longer AvailableMAX6803US26D3+TSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US27D1+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US27D1-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US27D2+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US27D2-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6803US27D3+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US27D3-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US28D1+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US28D1-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US28D2+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US28D2-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US28D3+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US28D3-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US29D1+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US29D1-TNo Longer AvailableMAX6803US29D1+TSOT,;4 pin;8 mm²-40°C to +125°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6803US29D2+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US29D2-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US29D3+TActiveSOT,;4 pin;8 mm²-40°C to +125°CLead Free
MAX6803US29D3-TNo Longer AvailableMAX6803US29D3+TSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US30D1+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US30D1-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US30D2+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US30D2-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US30D3+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US30D3-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6803US31D1+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US31D1-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US31D2+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US31D2-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US31D3+ActiveSOT,;4 pin;8 mm²-40°C to +125°CLead Free
MAX6803US31D3+TActiveSOT,;4 pin;8 mm²-40°C to +125°CLead Free
MAX6803US31D3-TNo Longer AvailableMAX6803US31D3+TSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US32D1+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US32D1-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US32D2+TActiveSOT;-40°C to +125°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6803US32D2-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US32D3+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US32D3-TNo Longer AvailableMAX6803US32D3+TSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US33D1+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US33D1-TNo Longer AvailableMAX6803US33D1+TSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US33D2+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US33D2-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US33D3+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803US33D3-TNo Longer AvailableSOT,;4 pin;8 mm²-40°C to +125°CNo
MAX6803US34D1+TActiveSOT;-40°C to +125°CSee data sheet
MAX6803-MAX6805.pdf MAX6805
典型工作电路 MAX6805