Datasheet > DS1819C

DS1819C

更新时间： 2024-09-17 14:57:31

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
8页	146K
描述
5V及3.3V MicroMonitor

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中文翻译

获取价格

数据手册

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DS1819C 数据手册

DS1814/DS1819

5V and 3.3V MicroMonitor

www.maxim-ic.com

FEATURES

PIN ASSIGNMENT

C Halts and restarts an out-of-control

microprocessor

C Holds microprocessor in check during power

transients

C Automatically restarts microprocessor after

power failure

C Monitors pushbutton for external override

C Accurate 5%, 10%, or 20% (3V only)

microprocessor power monitoring

C Eliminates the need for discrete components

C 20% tolerance for use with 3.0V systems

C Pin- and function-compatible with the

MAX823/24/25 products

SOT-23-5 PACKAGE

See Mech. Drawing

PIN DESCRIPTION

DS181xA

RST

GND

Active Low Reset Output

Ground

C Low cost SOT-23-5 package

C Industrial temperature range: -40LC to +85LC

PBRST

Pushbutton Reset Input

VCC

Strobe Input

DEVICE

RST

PBRST

Power Supply

DS181xA

DS181xB

DS181xC

DS181xB

RST

Active Low Reset Output

Ground

GND

x = "DS1814" for 5V devices

RST

Active High Reset Output

x = "DS1819" for 3V devices

VCC

Strobe Input

Power Supply

DS181xC

RST

Active Low Reset Output

Ground

GND

RST

Active High Reset Output

PBRST

VCC

Pushbutton Reset Input

Power Supply

DESCRIPTION

The DS1814 5-Volt MicroMonitor and the DS1819 3.3V MicroMonitor monitor three vital conditions for

a microprocessor: power supply, software execution, and external override. First, a precision temperature-

compensated reference and comparator circuit monitor the status of V_CC. When an out-of-tolerance

condition occurs, an internal power-fail signal is generated which forces the reset(s) to an active state.

When V_CCreturns to an in-tolerance condition, the reset signal is kept in the active state for a minimum of

140ms to allow the power supply and processor to stabilize.

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