MAX6401:µP Supervisory Circuits in 4-Bump (2 x 2) Chip-Scale Package

Low-Power Microprocessor Supervisor in 4-Bump Chip Scale Package

The MAX6400–MAX6405 is a family of ultra-low power microprocessor (µP) supervisory circuits used for monitoring battery, power-supply, and regulated system voltages. Each device contains a precision bandgap reference comparator and is trimmed to specified trip threshold voltages. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring system voltages from 2.5V to 5.0V. A manual reset input is also included. The MAX6400–MAX6405 assert a reset signal whenever the VCC supply voltage falls below a preset threshold. These devices are differentiated by their output logic configurations and preset threshold voltages. The MAX6400/MAX6403 (push-pull) and the MAX6402/MAX6405 (open-drain) have an active-low reset (active-low RESET is logic low when VCC is below VTH). The MAX6401/MAX6404 have an active-high push-pull output (RESET is logic high when VCC is below VTH). All parts are guaranteed to be in the correct output logic state for VCC down to 1V. The reset circuits designed to ignore fast transients on VCC. The MAX6400/MAX6401/MAX6402 have voltage thresholds between 2.20V and 3.08V in approximately 100mV increments. The MAX6403/MAX6404/MAX6405 have voltage thresholds between 3.30V and 4.63V in approximately 100mV increments. Ultra-low supply current of 500nA (MAX6400/MAX6401/MAX6402) makes these parts ideal for use in portable equipment. These devices are available in 4-bump chip-scale packages (UCSP™)

Key Features
  • Ultra-Small 4-Bump (2 x 2) UCSP (See UCSP Reliability Section for More Details).
  • 70% Smaller Than SC70 Package
  • Ultra-Low 500nA (typ) Supply Current (MAX6400/MAX6401/MAX6402)
  • Factory-Trimmed Reset Thresholds from 2.20V to 4.63V in Approximately 100mV Increments
  • ±2.5% Threshold Accuracy -40°C to +85°C
  • Factory-Set 100ms (min) Reset Timeout Period
  • Manual Reset Input
  • Guaranteed Reset Valid to VCC = 1.0V
  • Three Reset Output Logic Options: Active-Low Push-Pull, Active-High Push-Pull, and Active-Low Open-Drain.
  • Immune to Short VCC Transients
  • No External Components
MAX6400, MAX6401, MAX6402, MAX6403, MAX6404, MAX6405: Interfacing to µPs with Bidirectional Reset Pins
MAX6400, MAX6401, MAX6402, MAX6403, MAX6404, MAX6405: Interfacing to µPs with Bidirectional Reset Pins
Applications/Uses
  • Cell Phones
  • MP3 Players
  • Pagers
  • PDAs
  • Portable Battery-Powered Equipment
DataSheet
titleDownload file
MAX6400-MAX6405 Data SheetMAX6400-MAX6405.pdf
Parametrics
Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureSupervisor FeaturesICC
(µA)
Package/PinsBudgetary
Price
minmaxSee Notes
MAX64001.8 to 2.5
2.5 to 3.3
Active Low
Push-Pull
85ms to 300msNo WatchdogManual Reset1UCSP/4$1.80 @1k
MAX64011.8 to 2.5
2.5 to 3.3
Active High
Push-Pull
UCSP/4$1.07 @1k
MAX64021.8 to 2.5
2.5 to 3.3
Active Low
Open Drain
UCSP/4$1.16 @1k
MAX64053.3 to 5.5Active Low
Open Drain
UCSP/4-
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Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6401BS22+ActiveUCSP,;4 pin;1.3 mm²0°C to +70°CLead Free
MAX6401BS22+TActiveUCSP,;4 pin;1.3 mm²0°C to +70°CLead Free
MAX6401BS22-TNo Longer AvailableMAX6401BS22+TUCSP,;4 pin;1.3 mm²0°C to +70°CNo
MAX6401BS23+TActiveUCSP,;4 pin;1.3 mm²0°C to +70°CLead Free
MAX6401BS23-TNo Longer AvailableMAX6401BS23+TUCSP,;4 pin;1.3 mm²0°C to +70°CNo
MAX6401BS24+TActiveUCSP,;4 pin;1.3 mm²0°C to +70°CLead Free
MAX6401BS24-TNo Longer AvailableUCSP,;4 pin;1.3 mm²0°C to +70°CNo
MAX6401BS25+TActiveUCSP,;4 pin;1.3 mm²0°C to +70°CLead Free
MAX6401BS25-TNo Longer AvailableUCSP,;4 pin;1.3 mm²0°C to +70°CNo
MAX6401BS26+TActiveUCSP,;4 pin;1.3 mm²0°C to +70°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6401BS26-TNo Longer AvailableUCSP,;4 pin;1.3 mm²0°C to +70°CNo
MAX6401BS27+TActiveUCSP,;4 pin;1.3 mm²0°C to +70°CLead Free
MAX6401BS27-TNo Longer AvailableUCSP,;4 pin;1.3 mm²0°C to +70°CNo
MAX6401BS28+TActiveUCSP,;4 pin;1.3 mm²0°C to +70°CLead Free
MAX6401BS28-TNo Longer AvailableUCSP,;4 pin;1.3 mm²0°C to +70°CNo
MAX6401BS29+ActiveUCSP,;4 pin;1.3 mm²-40°C to +85°CLead Free
MAX6401BS29+TActiveUCSP,;4 pin;1.3 mm²0°C to +70°CLead Free
MAX6401BS29-TNo Longer AvailableMAX6401BS29+TUCSP,;4 pin;1.3 mm²0°C to +70°CNo
MAX6401BS30+TActiveUCSP,;4 pin;1.3 mm²0°C to +70°CLead Free
MAX6401BS30-TNo Longer AvailableUCSP,;4 pin;1.3 mm²0°C to +70°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6401BS31+TActiveUCSP,;4 pin;1.3 mm²0°C to +70°CLead Free
MAX6401BS31-TNo Longer AvailableUCSP,;4 pin;1.3 mm²0°C to +70°CNo
MAX6400-MAX6405.pdf MAX6405
µP接口,带双向复位 MAX6405