MAX823 Maxim, MAX823 Datasheet
MAX823
Manufacturer Part Number
MAX823
Description
5-Pin Microprocessor Supervisory Circuits
Manufacturer
Maxim
Datasheet
1.MAX823.pdf
(8 pages)
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The MAX823/MAX824/MAX825* microprocessor (µP)
supervisory circuits combine reset output, watchdog,
and manual-reset input functions in a 5-pin SOT23-5
package. They significantly improve system reliability
and accuracy compared to separate ICs or discrete
components. The MAX823/MAX824/MAX825 are
specifically designed to ignore fast transients on V
Five preprogrammed reset threshold voltages are
available, designated by the following package
suffixes: L = 4.63V, M = 4.38V, T = 3.08V, S = 2.93V,
and R = 2.63V. All three devices have an active-low
reset output, which is guaranteed to be in the correct
state for V
have an active-high reset output. The following Selector
Guide explains the functions offered in this series of
parts.
________________________Applications
19-0487; Rev 1; 6/97
Typical Operating Circuit appears at end of data sheet.
Marking Information appears at end of data sheet.
*Patents Pending
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
_____________________Selector Guide
_______________General Description
__________________________________________________________Pin Configurations
Active-Low Reset
Active-High Reset
Watchdog Input
Manual-Reset Input
TOP VIEW
Battery-Powered Computers and Controllers
Embedded Controllers
Intelligent Instruments
Automotive Systems
Critical µP Monitoring
Portable/Battery-Powered Equipment
FUNCTION
CC
RESET
GND
5-Pin Microprocessor Supervisory Circuits
down to 1V. The MAX824/MAX825 also
MR
________________________________________________________________ Maxim Integrated Products
1
2
3
SOT23-5
MAX823
MAX823
—
5
4
V
WDI
MAX824
CC
—
MAX825
—
RESET
RESET
CC
GND
.
1
2
3
SOT23-5
MAX824
† Insert the desired suffix letter (from the table below) into the
____________________________Features
blank to complete the part number.
______________Ordering Information
MAX823_EUK
MAX824_EUK
MAX825_EUK
Precision Monitoring of +3V, +3.3V, and +5V
Power Supplies
Operating Current: 10µA (MAX823L/M)
Fully Specified Over Temperature
140ms Min Power-On Reset
Guaranteed RESET Valid to V
Power-Supply Transient Immunity
Watchdog Timer with 1.6sec Timeout
(MAX823/MAX824)
Manual-Reset Input (MAX823/MAX825)
No External Components
PART
5
4
†
V
WDI
CC
SUFFIX
M
S
R
L
T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
3µA (MAX825T/S/R)
RESET
RESET
GND
THRESHOLD (V)
1
2
3
RESET
CC
SOT23-5
4.63
4.38
3.08
2.93
2.63
MAX825
= 1V
PIN-PACKAGE
5 SOT23-5
5 SOT23-5
5 SOT23-5
5
4
V
MR
CC
1
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