(PDF) MAX810R Datasheet PDF | Maxim





MAX810R Datasheet PDF

Part Number MAX810R
Description 3-Pin Microprocessor Reset Circuits
Manufacture Maxim
Total Page 8 Pages
PDF Download Download MAX810R Datasheet PDF

Features: Datasheet pdf 19-0344; Rev 4; 12/99 3-Pin Microproces sor Reset Circuits General Description The MAX803/MAX809/MAX810 are microproce ssor (µP) supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by el iminating external components and adjus tments when used with +5V, +3.3V, +3.0V , or +2.5V-powered circuits. These circ uits perform a single function: they as sert a reset signal whenever the VCC su pply voltage declines below a preset th reshold, keeping it asserted for at lea st 140ms after VCC has risen above the reset threshold. Reset thresholds suita ble for operation with a variety of sup ply voltages are available. The MAX803 has an open-drain output stage, while t he MAX809/MAX810 have push-pull outputs . The MAX803’s open-drain RESET outpu t requires a pull-up resistor that can be connected to a voltage higher than V CC. The MAX803/MAX809 have an active-lo w RESET output, while the MAX810 has an active-high RESET output. T.

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MAX810R datasheet
19-0344; Rev 4; 12/99
3-Pin Microprocessor Reset Circuits
General Description
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 VCC supply voltage declines
below a preset threshold, keeping it asserted for at
least 140ms after VCC has risen above the reset thresh-
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
VCC. The MAX803/MAX809 have an active-low RESET
output, while the MAX810 has an active-high RESET
output. The reset comparator is designed to ignore fast
transients on VCC, and the outputs are guaranteed to
be in the correct logic state for VCC down to 1V.
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.
Applications
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
Automotive
Typical Operating Circuit
VCC
VCC
MAX803
MAX809
RESET
RPULL-UP*
VCC
µP
RESET
INPUT
GND GND
*MAX803 ONLY
____________________________Features
o Precision Monitoring of +2.5V, +3V, +3.3V, and
+5V Power-Supply Voltages
o Fully Specified Over Temperature
o Available in Three Output Configurations
Open-Drain RESET Output (MAX803)
Push-Pull RESET Output (MAX809)
Push-Pull RESET Output (MAX810)
o 140ms min Power-On Reset Pulse Width
o 12µA Supply Current
o Guaranteed Reset Valid to VCC = +1V
o Power Supply Transient Immunity
o No External Components
o 3-Pin SC70 and SOT23 Packages
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX803_EXR-T
-40°C to +105°C 3 SC70-3
MAX803_EXR-T10 -40°C to +105°C 3 SC70-3
MAX809_EXR-T
-40°C to +105°C 3 SC70-3
MAX809_EXR-T10 -40°C to +105°C 3 SC70-3
MAX809_EUR-T
-40°C to +105°C 3 SOT23-3
MAX809_EUR-T10 -40°C to +105°C 3 SOT23-3
MAX810_EXR-T
-40°C to +105°C 3 SC70-3
MAX810_EXR-T10 -40°C to +105°C 3 SC70-3
MAX810_EUR-T
-40°C to +105°C 3 SOT23-3
MAX810_EUR-T10 -40°C to +105°C 3 SOT23-3
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.
Pin Configuration
TOP VIEW
GND 1
MAX803
MAX809
MAX810
3 VCC
RESET (RESET) 2
( ) ARE FOR MAX810.
SC70-3/SOT23-3
MAX803 AVAILABLE IN SC70-3 ONLY.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.

MAX810R datasheet
3-Pin Microprocessor Reset Circuits
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (with respect to GND)
VCC ....................................................................-0.3V to +6.0V
RESET, RESET (push-pull) .....................-0.3V to (VCC + 0.3V)
RESET (open drain)...........................................-0.3V to +6.0V
Input Current, VCC ..............................................................20mA
Output Current, RESET, RESET ..........................................20mA
Continuous Power Dissipation (TA = +70°C)
3-Pin SC70 (derate 2.17mW/°C above +70°C) ............174mW
3-Pin SOT23 (derate 4mW/°C above +70°C)...............320mW
Operating Temperature Range .........................-40°C to +105°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Rate of Rise, VCC ............................................................100V/µs
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = full range, TA = -40°C to +105°C, unless otherwise noted. Typical values are at TA = +25°C, VCC = 5V for L/M/J versions, VCC
= 3.3V for T/S versions, VCC = 3V for R version, and VCC = 2.5V for Z version.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
VCC Range
Supply Current (SOT23)
Supply Current (SC70)
Reset Threshold
TA = 0°C to +70°C
1.0 5.5
TA = -40°C to +105°C
1.2 5.5
TA = -40°C to VCC < 5.5V, MAX8_ _J/L/M
ICC
+85°C
TA = +85°C to
VCC < 3.6V, MAX8_ _R/S/T
VCC < 5.5V, MAX8_ _L/M
+105°C
VCC < 3.6V, MAX8_ _R/S/T
24 60
17 50
100
100
TA = -40°C to VCC < 5.5V, MAX8_ _L/M
ICC
+85°C
TA = +85°C to
VCC < 3.6V, MAX8_ _R/S/T/Z
VCC < 5.5V, MAX8_ _L/M
+105°C
VCC < 3.6V, MAX8_ _R/S/T/Z
16 35
12 30
75
75
TA = +25°C
4.56 4.63 4.70
MAX8_ _L
TA = -40°C to +85°C
4.50
4.75
TA = +85°C to +105°C
4.40
4.86
TA = +25°C
4.31 4.38 4.45
MAX8_ _M
TA = -40°C to +85°C
4.25
4.50
TA = +85°C to +105°C
4.16
4.56
MAX809J
(SOT only)
TA = +25°C
TA = -40°C to +85°C
TA = +85°C to +105°C
3.93 4.00 4.06
3.89 4.10
3.80 4.20
TA = +25°C
3.04 3.08 3.11
VTH MAX8_ _T
TA = -40°C to +85°C
3.00
3.15
TA = +85°C to +105°C
2.92
3.23
TA = +25°C
2.89 2.93 2.96
MAX8_ _S
TA = -40°C to +85°C
2.85
3.00
TA = +85°C to +105°C
2.78
3.08
TA = +25°C
2.59 2.63 2.66
MAX8_ _R
TA = -40°C to +85°C
2.55
2.70
TA = +85°C to +105°C
2.50
2.76
MAX8_ _Z
(SC70 only)
TA = +25°C
TA = -40°C to +85°C
TA = +85°C to +105°C
2.28 2.32 2.35
2.25 2.38
2.21 2.45
V
µA
V
2 _______________________________________________________________________________________




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