DS1233D Dallas, DS1233D Datasheet

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DS1233D

Manufacturer Part Number
DS1233D
Description
5V EconoReset
Manufacturer
Dallas
Datasheet

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FEATURES
DESCRIPTION
The DS1233D 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 state. When V
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 DS1233D 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 350 ms after the power supply has reached the selected tolerance. This allows the
power supply and microprocessor to stabilize before
www.dalsemi.com
Automatically restarts microprocessor after
power failure
Maintains reset for 350 ms after V
to an in-tolerance condition
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 5 k pull-up resistor
Compatible with Motorola 68XXX series and
HC16 Microprocessors
Operating temperature of -40°C to +85°C
CC
returns
CC
). When an out-of-tolerance condition is detected, an internal
RST
1 of 5
RST
signal is asserted. On power-up,
PIN ASSIGNMENT
PIN DESCRIPTION
PIN 1
PIN 2
PIN 3
PIN 4
TO-92 PACKAGE
Drawings Section
is released.
See Mech.
DALLAS
DS1233
1 2 3
1 2 3
Econo
Reset
CC
GROUND
V
GROUND (SOT-223 ONLY)
RESET
is detected as out of tolerance as
CC
CC
5V EconoReset
returns to an in-tolerance
SOT-223 PACKAGE
Drawings Section
2
See Mech.
RST
1
4
DS1233D
3
is kept active
111899

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DS1233D Summary of contents

Page 1

... OPERATION - POWER MONITOR The DS1233D 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 350 ms after the power supply has reached the selected tolerance ...

Page 2

... BLOCK DIAGRAM Figure 1 APPLICATION EXAMPLE Figure DS1233D ...

Page 3

... POWER UP Figure 3 POWER DOWN Figure DS1233D ...

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 DS1233D +0. +85 C) MAX UNITS NOTES 5 =5V 10%) DD MAX UNITS NOTES ...

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 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. DS1233D 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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