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

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

Product Details

Key Features

Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 1.8 to 2.5
2.5 to 3.3
Reset Out Active High
Push-Pull
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
Supervisor Features Manual Reset
ICC (µA) (max) 1
Package/Pins UCSP (B)/4
Budgetary
Price (See Notes)
0
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Simplified Block Diagram

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Parameters

Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 1.8 to 2.5
2.5 to 3.3
Reset Out Active High
Push-Pull
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
Supervisor Features Manual Reset
ICC (µA) (max) 1
Package/Pins UCSP (B)/4
Budgetary
Price (See Notes)
0

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

Applications/Uses

  • Cell Phones
  • MP3 Players
  • Pagers
  • PDAs
  • Portable Battery-Powered Equipment

Description

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™)

Simplified Block Diagram

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 Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.