ds1233az-15t-r Maxim Integrated Products, Inc., ds1233az-15t-r Datasheet

ds1233az-15t-r

Manufacturer Part Number

ds1233az-15t-r

Description

Ds1233a 3.3v Econoreset

Manufacturer

Maxim Integrated Products, Inc.

Datasheet

1.DS1233AZ-15T-R.pdf (5 pages)

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FEATURES

DESCRIPTION

The DS1233A EconoReset monitors two vital conditions for a microprocessor: power supply and external

override. A precision temperature-compensated reference and comparator circuit are used to monitor the

status of the power supply (V

signal is generated which forces reset to the active state. When V

the reset signal is kept in the active state for approximately 350ms to allow the power supply and

processor to stabilize. The second function of the DS1233A is pushbutton reset control. The DS1233A

debounces a pushbutton closure and will generate a 350ms reset pulse upon release.

OPERATION — POWER MONITOR

The DS1233A provides the functions of detecting out-of-tolerance power supply conditions and warning

a processor-based system of impending power failure. When V

defined by the tolerance of the part selected, the

for approximately 350ms after the power supply has reached the selected tolerance. This allows the power

supply and microprocessor to stabilize before

www.maxim-ic.com

For Package Information go to:

www.maxim-ic.com/DallasPackInfo

Automatically restarts microprocessor after

power failure

Monitors pushbutton for external override

Internal circuitry debounces pushbutton

switch

Maintains reset for 350ms after V

an in-tolerance condition or pushbutton

released

Accurate 10% or 15% microprocessor 3.3V

power supply monitoring

Reduces need for discrete components

Precision temperature-compensated voltage

reference and voltage sensor

Low-cost TO-92 package or surface mount

SOT-223 package

Internal 5kΩ pull-up resistor

Operating temperature of -40°C to +85°C

). When an out-of-tolerance condition is detected, an internal power fail

returns to

RST

1 of 5

is released.

signal is asserted. On power-up,

PIN ASSIGNMENT

PIN DESCRIPTION

PIN 1

PIN 2

PIN 3

PIN 4

TO-92 PACKAGE

BOTTOM VIEW

DS1233A

DALLAS

1 2 3

Econo

Reset

GROUND

GROUND (SOT-223 ONLY)

RESET

returns to an in-tolerance condition,

is detected as out-of-tolerance as

3.3V EconoReset

SOT-223 PACKAGE

TOP VIEW

RST

DS1233A

is kept active

122001

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ds1233az-15t-r Summary of contents

Page 1

FEATURES Automatically restarts microprocessor after power failure Monitors pushbutton for external override Internal circuitry debounces pushbutton switch Maintains reset for 350ms after V an in-tolerance condition or pushbutton released Accurate 10% or 15% microprocessor 3.3V power supply monitoring Reduces ...

Page 2

OPERATION — PUSHBUTTON RESET The DS1233A provides for a pushbutton switch to be connected to the DS1233A is not in a reset cycle, it continuously monitors the is detected, the DS1233A will debounce the switch by pulling the has expired, ...

Page 3

PUSHBUTTON RESET Figure 3 POWER-UP Figure 4 POWER-DOWN Figure DS1233A ...

Page 4

ABSOLUTE MAXIMUM RATINGS* Voltage on V Pin Relative to Ground CC Voltage on I/O Relative to Ground Operating Temperature Range Storage Temperature Range Soldering Temperature * This is a stress rating only and functional operation of the device at these ...

Page 5

ECONORESET SELECTION GUIDE DS1233-15 DS1233-10 DS1233-5 DS1233D-15 5V DS1233D-10 DS1233D-5 DS1833-15 DS1833-10 DS1833-5 DS1233A-15 3.3V DS1233A-10 V TRIP POINT CC MIN TYP MAX 4.0 4.125 4.24 4.25 4.375 4.49 4.5 4.625 4.75 4.0 4.125 4.24 4.25 4.375 4.49 4.5 4.625 ...

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