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DS1232LP
Low-Power MicroMonitor Chip


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 112kB)
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The DS1232LP/LPS Low-Power MicroMonitor Chip monitors three vital conditions for a microprocessor: power supply, software execution, and external override. First, a precision temperature-compensated reference and comparator circuit monitors the status of VCC. When an out-of-tolerance condition occurs, an internal power-fail signal is generated, which forces reset to the active state. When VCC returns to an in-tolerance condition, the reset signals are kept in the active state for a minimum of 250ms to allow the power supply and processor to stabilize.

Key Features
  • Super-low power version of DS1232
  • 50µA quiescent current
  • Halts and restarts an out-of-control microprocessor
  • Automatically restarts microprocessor after power failure
  • Monitors pushbutton for external override
  • Accurate 5% or 10% microprocessor power supply monitoring
  • 8-pin DIP, 8-pin SO, or space saving µSOP package available
  • Optional 16-pin SO package available
  • Industrial temperature -40°C to +85°C available, designated N

    Key Specifications:  Supervisors (1 Monitored Voltage)
    Part Number Reset Thresh.
    (V)
    Reset Out Reset Out tRESET Watchdog Feature Watchdog Timeout Supervisor Features Reset Thresh. Accur.
    (%)
    ICC
    (µA)
    Price
    Active Low Active High min @ +25°C max See Notes
    DS1232LP  3.3 to 5.5 Open Drain Push-Pull 85ms to 300ms Input (WDI)
    1s to 2s
    <1s
    Manual Reset 2.5 50 $1.09 @1k
    See All Supervisors (1 Monitored Voltage) (274)

    Diagram
    DS1232LP: Block Diagram
    Block Diagram

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    1999-11-18
    This page last modified: 2009-10-26


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