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    參數(shù)資料
    型號: ASM6389XS21TD3F
    元件分類: 電源管理
    英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4
    封裝: ROHS COMPLIANT, SC-70, 4 PIN
    文件頁數(shù): 1/15頁
    文件大?。?/td> 150K
    代理商: ASM6389XS21TD3F
    Alliance Semiconductor
    2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
    Notice: The information in this document is subject to change without notice
    September 2005
    rev 1.5
    ASM6381 - ASM6390
    Single/Dual Low Voltage, Low Power Microcontroller Power Supply Supervisor
    General Description
    The ASM6381 - ASM6390 are cost effective +1.8V to +5V
    power supply supervisor circuits optimized for low-power
    microprocessor (P), microcontroller (C) and digital systems.
    They provide a reset output during power-up, power-down and
    brown-out conditions. They provide excellent reliability by
    eliminating external components and adjustments.
    A reset signal is issued if the power supply voltage drops below
    a preset reset threshold and is asserted for a minimum reset
    timeout period after the supply has risen above the reset
    threshold. The reset timeout periods are available from 1ms to
    1200ms. The ASM6381, ASM6384 and ASM6387 have a push-
    pull active-low reset output. The ASM6382, ASM6385 and
    ASM6388 have a push-pull active-high reset output, and the
    ASM6383, ASM6386, ASM6389 and ASM6390 have an open-
    drain active-low reset output. The ASM6384, ASM6385 and
    ASM6386 also feature a manual reset input.
    The ASM6387, ASM6388, ASM6389 have an auxiliary input
    RESET IN for monitoring a second voltage. The ASM6390
    offers a manual reset input with a longer VCC reset timeout
    period and a shorter manual reset timeout.
    The reset output state is guaranteed to be in the correct logic
    state for VCC down to 1V. The reset comparator is designed to
    ignore fast transients on VCC.
    Low supply current makes the ASM6381 - ASM6390 ideal for
    use in portable and battery operated equipments. The
    ASM6381 - ASM6383 are available in a compact, industry
    standard 3-pin SC70 package and the ASM6384 - ASM6390
    are available in a compact, industry standard 4-pin SC70
    package. The ASM63811, ASM63812,
    ASM63832 are
    available in 3-pin SOT23 package. ASM63813 is available in
    3-pin and 5-pin SOT23 package.
    Reset thresholds are available from +1.58V to 4.63V in
    approximately 100mV increments to support +1.8V to +5V
    systems.
    Features:
    Factory-set Reset Threshold Voltages ranging from +1.58V
    to 4.63V.
    Monitor 1.8V to 5V supplies.
    Push-Pull Active-low reset valid with 1.0V supply.
    Small 3-pin SC-70, 4-pin SC-70, 3-pin and 5-pin SOT23
    packages.
    No external components.
    Specified over full temperature range: -40°C to 125°C
    Seven Reset Timeout periods: 1ms, 20ms, 140ms, 280ms,
    560ms, 1120ms, 1200ms (min).
    Low power consumption: 3A at +1.8V.
    Auxiliary RESET IN
    Manual Reset input.
    Applications
    Embedded controllers
    Portable/Battery operated systems
    Intelligent instruments
    Wireless communication systems
    PDAs and handheld equipment
    Computers
    Typical Operating Circuit
    VCC
    P
    RESET
    Input
    RESET
    (RESET)
    GND
    (RESET)
    MR
    RESET IN
    R1
    R2
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