MAX809MEUR Maxim Integrated Products, MAX809MEUR Datasheet

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MAX809MEUR

Manufacturer Part Number
MAX809MEUR
Description
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX809MEUR.pdf (8 pages)

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The MAX803/MAX809/MAX810 are microprocessor (µP)
supervisory circuits used to monitor the power supplies
in µP and digital systems. They provide excellent circuit
reliability and low cost by eliminating external compo-
nents and adjustments when used with +5V, +3.3V,
+3.0V, or +2.5V powered circuits.
These circuits perform a single function: they assert a
reset signal whenever the V
below a preset threshold, keeping it asserted for at
least 140ms after V
old. Reset thresholds suitable for operation with a vari-
ety of supply voltages are available.
The MAX803 has an open-drain output stage, while the
MAX809/MAX810 have push-pull outputs. The
MAX803’s open-drain RESET output requires a pull-up
resistor that can be connected to a voltage higher than
V
output, while the MAX810 has an active-high RESET
output. The reset comparator is designed to ignore fast
transients on V
be in the correct logic state for V
Low supply current makes the MAX803/MAX809/
MAX810 ideal for use in portable equipment. The
MAX803 is available in a 3-pin SC70 package, and the
MAX809/MAX810 are available in 3-pin SC70 or SOT23
packages.
19-0344; Rev 6; 12/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
CC
*MAX803 ONLY
. The MAX803/MAX809 have an active-low RESET
V
CC
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
Automotive
MAX803
MAX809
GND
V
CC
CC
Typical Operating Circuit
RESET
________________________________________________________________ Maxim Integrated Products
, and the outputs are guaranteed to
CC
has risen above the reset thresh-
General Description
R
PULL-UP
CC
3-Pin Microprocessor Reset Circuits
supply voltage declines
*
CC
RESET
INPUT
Applications
down to 1V.
GND
V
µP
CC
♦ Precision Monitoring of +2.5V, +3V, +3.3V, and
♦ Fully Specified Over Temperature
♦ Available in Three Output Configurations
♦ 140ms min Power-On Reset Pulse Width
♦ 12µA Supply Current
♦ Guaranteed Reset Valid to V
♦ Power Supply Transient Immunity
♦ No External Components
♦ 3-Pin SC70 and SOT23 Packages
____________________________Features
Note: These parts are offered in 2.5k or 10k reels, and must be
ordered in 2.5k or 10k increments. Order MAX803_EXR-T for
2.5k reels and MAX803_EXR-T10 for 10k reels. Insert the
desired suffix letter from the Selector Guide into the blank to
complete the part number. All versions of these products may
not be available at the time of announcement. Contact factory for
availability.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
MAX803_EXR-T
MAX803_EXR-T10
MAX809_EXR-T
MAX809_EXR-T10
MAX809_EUR-T
MAX809_EUR-T10
MAX810_EXR-T
MAX810_EXR-T10
MAX810_EUR-T
MAX810_EUR-T10
+5V Power-Supply Voltages
TOP VIEW
( ) ARE FOR MAX810.
MAX803 AVAILABLE IN SC70-3 ONLY.
Open-Drain RESET Output (MAX803)
Push-Pull RESET Output (MAX809)
Push-Pull RESET Output (MAX810)
PART
RESET (RESET)
GND
1
2
SC70-3/SOT23-3
Ordering Information
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +105°C
-40°C to +105°C
-40°C to +125°C
-40°C to +125°C
-40°C to +105°C
-40°C to +105°C
TEMP. RANGE
MAX803
MAX809
MAX810
Pin Configuration
CC
3
= +1V
V
CC
PIN-PACKAGE
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SOT23-3
3 SOT23-3
3 SC70-3
3 SC70-3
3 SOT23-3
3 SOT23-3
1

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MAX809MEUR Summary of contents

Page 1

... PULL-UP MAX803 MAX809 RESET GND *MAX803 ONLY ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ____________________________Features ♦ Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages ♦ Fully Specified Over Temperature ♦ ...

Page 2

Microprocessor Reset Circuits ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) V ....................................................................-0.3V to +6.0V CC RESET, RESET (push-pull) .....................-0. RESET (open drain)...........................................-0.3V to +6.0V Input Current, V ..............................................................20mA CC Output Current, RESET, RESET ..........................................20mA Rate ...

Page 3

Microprocessor Reset Circuits ELECTRICAL CHARACTERISTICS (continued full range -40°C to +105°C (SOT23 +25° for L/M/J versions PARAMETER SYMBOL Reset Threshold (SC70 only) Reset Threshold Tempco ...

Page 4

Microprocessor Reset Circuits ELECTRICAL CHARACTERISTICS (continued full range -40°C to +105°C (SOT23 +25° for L/M/J versions PARAMETER SYMBOL RESET Output Voltage High (push-pull active high, ...

Page 5

Microprocessor Reset Circuits PART/SUFFIX RESET THRESHOLD (V) MAX803L 4.63 MAX803M 4.38 MAX803T 3.08 MAX803S 2.93 MAX803R 2.63 MAX803Z 2.32 MAX809L 4.63 MAX809M 4.38 MAX809J 4.00 MAX809T 3.08 MAX809S 2.93 MAX809R 2.63 MAX809Z 2.32 MAX810L 4.63 MAX810M 4.38 MAX810T 3.08 ...

Page 6

Microprocessor Reset Circuits Therefore, high-impedance CMOS logic inputs con- nected to RESET can drift to undetermined voltages. This presents no problem in most applications since most µP and other circuitry is inoperative with V below 1V. However, in applications ...

Page 7

Microprocessor Reset Circuits below 1V, so does the IC’s ability to sink current at RESET. Also, with any pull-up, RESET will be pulled high as V decays toward 0. The voltage where this CC occurs depends on the pull-up ...

Page 8

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products Package Information (continued) Printed USA is a registered trademark of Maxim Integrated Products, Inc ...

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