DS1833 Dallas Semiconductor, DS1833 Datasheet

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DS1833

Manufacturer Part Number
DS1833
Description
5V EconoReset
Manufacturer
Dallas Semiconductor
Datasheet

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FEATURES
DESCRIPTION
The DS1833 EconoReset uses a precision temperature compensated reference and comparator circuit to
monitor the status of the power supply (V
power fail signal is generated which forces reset to the active (high) state. When V
tolerance condition, the reset signal is kept in the active state for approximately 350 ms to allow the
power supply and processor to stabilize.
OPERATION - POWER MONITOR
The DS1833 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 RST signal is asserted. On power-up, RST is kept active
for approximately 350 ms after the power supply has reached the selected tolerance. This allows the
power supply and microprocessor to stabilize before RST is released.
www.dalsemi.com
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Automatically restarts microprocessor after
power failure
Maintains active-high reset for 350 ms after
V
Accurate 5%, 10% or 15% microprocessor 5V
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 5k pull-up resistor
Operating temperature of -40 C to +85 C
CC
returns to an in-tolerance condition
CC
). When an out-of-tolerance condition is detected, an internal
1 of 5
PIN ASSIGNMENT
PIN DESCRIPTION
PIN 1
PIN 2
PIN 3
PIN 4
TO-92 PACKAGE
Drawings Section
See Mech.
DALLAS
1 2 3
1 2 3
DS1833
CC
Ground
Reset
V
Ground (SOT-223 only)
is detected as out-of-tolerance, as
CC
5V EconoReset
SOT-223 PACKAGE
Drawings Section
2
See Mech.
CC
1
4
returns to an in-
3
DS1833
112099

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DS1833 Summary of contents

Page 1

... OPERATION - POWER MONITOR The DS1833 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 RST signal is asserted. On power-up, RST is kept active for approximately 350 ms after the power supply has reached the selected tolerance ...

Page 2

... BLOCK DIAGRAM Figure 1 www.DataSheet4U.com APPLICATION EXAMPLE Figure DS1833 ...

Page 3

... POWER-UP Figure 3 www.DataSheet4U.com POWER-DOWN Figure DS1833 ...

Page 4

... CCTP2 V 4.0 4.125 CCTP3 C OUT SYMBOL MIN TYP t 250 350 RST t RPD t 300 250 350 RPU DS1833 +0. +85 C) MAX UNITS NOTES 5 =5V 10%) DD MAX UNITS NOTES ...

Page 5

... ECONORESET SELECTION GUIDE www.DataSheet4U.com 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 VCC TRIP POINT 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 4.75 4.0 4.125 4.24 4.25 4.375 4.49 4.5 4.625 4.75 2.64 2.72 2.80 2.8 2.88 2. DS1833 PUSHBUTTON DETECT MIN TYP MAX 2.4 - 3.3 2.4 - 3.3 2.4 - 3.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.8 - 3.0 1.8 - 3.0 ...

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