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MAX6439 Datasheet

Part NameMAX6439 MaximIC
Maxim Integrated MaximIC
DescriptionLow-Power, Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µP Reset
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General Description
The MAX6439–MAX6442 are a family of ultra-low-power battery monitors with integrated microprocessor (µP) supervisors. The battery monitors are offered with single or dual low-battery output options that can be used to signal when the battery is OK (enabling full system operation), when the battery is low (for low-power system operation), and when the battery is dead (to disable system operation). These devices also have an independent µP supervisor that monitors VCC and provides an active-low reset output. A manual reset function is available to reset the µP with a push-button. No external components are required.

Features
♦ Factory-Trimmed VBATT Threshold Options for
   Monitoring Single-Cell Li+ or Multicell
   Alkaline/NiCd/NiMH Applications
♦ Immune to Short Battery Voltage Transients
♦ Low Current (2.5µA typ at 3.6V)
♦ Single and Dual Low-Battery Output Options
♦ 150ms Minimum LBO Timeout Period
♦ Independent µP Reset with Manual Reset
♦ Factory-Set Reset Thresholds for Monitoring VCC
   from 1.8V to 3.3V
♦ Available with 150ms (min) and 1.2s (min) VCC
   Reset Timeout Period Options
♦ -40°C to +85°C Operating Temperature Range
♦ Small 6- and 8-Pin SOT23 Packages
♦ No External Components

Applications
   Battery-Powered Systems (Single-Cell Li+ or Two-/Three-Cell NiMH, NiCd, Alkaline)
   Cell Phones/Cordless Phones
   Portable Medical Devices
   Electronic Toys
   Pagers
   PDAs
   MP3 Players

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