Datasheet > DS1819CR-5/TR

DS1819CR-5/TR

更新时间： 2024-09-15 23:48:47

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
8页	113K
描述
Voltage Detector

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中文翻译

获取价格

数据手册

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DS1819CR-5/TR 数据手册

DS1814/DS1819

5-Volt and 3.3-Volt MicroMonitor

www.dalsemi.com

FEATURES

ꢀ Halts and restarts an out-of-control

microprocessor

PIN ASSIGNMENT

ꢀ Holds microprocessor in check during power

transients

ꢀ Automatically restarts microprocessor after

power failure

ꢀ Monitors pushbutton for external override

ꢀ Accurate 5%, 10%, or 20% (3-volt only)

microprocessor power monitoring

ꢀ Eliminates the need for discrete components

ꢀ 20% tolerance for use with 3.0-volt systems

ꢀ 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

ꢀ Low cost SOT-23-5 package

ꢀ Industrial temperature: -40°C to +85°C

PBRST

Pushbutton Reset Input

VCC

Strobe Input

Power Supply

DEVICE

RST

PBRST

DS181xA

DS181xB

DS181xC

x = "DS1814" for 5 volt devices

x = "DS1819" for 3 volt devices

DS181xB

RST

GND

RST

Active Low Reset Output

Ground

Active High Reset Output

VCC

Strobe Input

Power Supply

DS181xC

RST

GND

RST

Active Low Reset Output

Ground

Active High Reset Output

PBRST

VCC

Pushbutton Reset Input

Power Supply

DESCRIPTION

The DS1814 5-Volt MicroMonitor and the DS1819 3.3-Volt 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 140 ms to allow the power supply and processor to stabilize.

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