DS1819AR-20-U Maxim Integrated Products, DS1819AR-20-U Datasheet

DS1819AR-20-U

Manufacturer Part Number

DS1819AR-20-U

Description

SOT23/E/5 VOLT AND 3.3 VOLT MICROMONITOR

Manufacturer

Maxim Integrated Products

Datasheet

1.DS1819AR-5T-R.pdf (8 pages)

Specifications of DS1819AR-20-U

Pack_quantity

Comm_code

85423990

Lead_time

Current page: 1 of 8
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FEATURES

§ Halts and restarts an out-of-control

§ Holds microprocessor in check during power

§ Automatically restarts microprocessor after

§ Monitors pushbutton for external override

§ Accurate 5%, 10%, or 20% (3V only)

§ Eliminates the need for discrete components

§ 20% tolerance for use with 3.0V systems

§ Pin- and function-compatible with the

§ Low cost SOT-23-5 package

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

x = "DS1814" for 5V devices

x = "DS1819" for 3V devices

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

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

When V

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

www.maxim-ic.com

DEVICE

DS181xA

DS181xB

DS181xC

microprocessor

transients

power failure

microprocessor power monitoring

MAX823/24/25 products

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

RST

PBRST

1 of 8

PIN ASSIGNMENT

PIN DESCRIPTION

DS181xA

DS181xB

DS181xC

5V and 3.3V MicroMonitor

GND

VCC

GND

RST

VCC

GND

RST

VCC

RST

PBRST

RST

PBRST

SOT-23-5 PACKAGE

See Mech. Drawing

Active Low Reset Output

Ground

Pushbutton Reset Input

Strobe Input

Power Supply

Active Low Reset Output

Ground

Active High Reset Output

Strobe Input

Power Supply

Active Low Reset Output

Ground

Active High Reset Output

Pushbutton Reset Input

Power Supply

. When an out-of-tolerance

DS1814/DS1819

122001

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