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Maxim Integrated Semiconductor Electronic Components Datasheet

MXD1815 Datasheet

Low-Power uP Reset Circuits

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MXD1810–MXD1813/
MXD1815–MXD1818
Low-Power μP Reset Circuits in 3-Pin
SC70/SOT23
General Description
The MXD1810–MXD1813/MXD1815–MXD1818 fam-
ily of microprocessor (μP) reset circuits monitor power
supplies in μP and digital systems. These devices
provide excellent circuit reliability and low cost by
eliminating external components and adjustments when
used with +2.5V/+3.0V/+3.3V (MXD1815–MXD1818),
and +5V (MXD1810–MXD1813) systems.
These circuits assert a reset signal whenever the VCC
supply voltage declines below a preset threshold, keeping
reset asserted for at least 100ms after VCC rises above the
reset threshold. The MXD1813/MXD1818 also keep reset
asserted for at least 100ms after the output is momentarily
pulled to GND by an external pushbutton switch.
The MXD1812/MXD1817 have an active-high push-
pull RESET output. The MXD1810/MXD1815 (push-
pull) and MXD1811/MXD1813/MXD1816/MD1818 (open-
drain) have an active-low RESET output. The open-drain
devices (MXD1811/MXD1813/MXD1816/MXD1818)
have an internal pullup resistor to VCC. The MXD1813/
MXD1818 feature a debounced manual-reset feature that
asserts a reset if the RESET pin is pulled low for more
than 1.5μs. When used to initiate manual reset, RESET
debounces signals from devices such as mechanical
switches. For devices with this feature, the release of the
external switch triggers the reset period.
The MXD1810–MXD1813/MXD1815–MXD1818 are
guaranteed to output the correct logic state for VCC down
to +1V. These ICs provide a reset comparator designed
to ignore fast transients on VCC. Reset thresholds are
available between +2.18V and +4.62V. These
small, low-power (4μA) devices are ideal for use in
portable equipment. All are available in space-saving
3-pin SC70 and SOT23 packages, and are specified from
-40°C to +105°C.
Applications
Computers and Controllers
Intelligent Instruments
Set-Top Boxes
Printers
Critical μP and μC Monitoring
Portable/Battery-Powered Equipment
Features
Precision Monitoring of +2.5V, +3V, +3.3V, and +5V
Power-Supply Voltages
Available in Four Reset Output Configurations
Factory-Set Reset Threshold Voltages: 2.18V,
2.31V, 2.55V, 2.88V, 3.06V, 4.12V, 4.37V, 4.62V
±2.5% Reset Threshold Accuracy Over Temperature
Fixed Reset Timeout Period: 100ms (min)
Guaranteed RESET/RESET Valid to VCC = +1V
Debounced Manual-Reset Detect (MXD1813/
MXD1818)
Power-Supply Transient Immunity
No External Components
Low Power Consumption (4μA)
Pin Compatible with DS181_ Products (SOT23)
3-Pin SC70 and SOT23 Packages
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MXD1810UR_ _-T -40°C to +105°C 3 SOT23
MXD1810XR_ _-T -40°C to +105°C 3 SC70
The MXD1810–MXD1813/MXD1815–MXD1818 are available
w(MitXh Dfa1c8t1o5ry–-MseXt DV1C8C18re) saentdth+r4e.s1h2oVldtsofr+o4m.62+V2.1(M8VXDto18+130.0–6V
MXD1813). Choose the desired reset-threshold suffix from the
Reset Threshold Table and insert it in place of the “_ _”
following “R” in the part number. All devices are available in
tape-and-reel only in 2500 unit increments. Other threshold
voltages may be available. Contact factory for availability.
Devices are available in both leaded and lead(Pb)-free packag-
ing. Specify lead-free by replacing “-T” with “+T” when ordering.
Ordering Information continued at end of data sheet.
Pin Configurations
TOP VIEW
VCC 1
RESET
(RESET)
1
MXD181_X 3 GND
MXD181_U 3 GND
RESET
(RESET)
2
VCC 2
SC70-3
SOT23-3
() ARE FOR THE MXD1812/MXD1817
19-2243; Rev 2; 11/14


Maxim Integrated Semiconductor Electronic Components Datasheet

MXD1815 Datasheet

Low-Power uP Reset Circuits

No Preview Available !

MXD1810–MXD1813/
MXD1815–MXD1818
Low-Power μP Reset Circuits in 3-Pin
SC70/SOT23
Absolute Maximum Ratings
VCC to GND..........................................................-0.3V to +6.0V
Push-Pull RESET (MXD1810/MXD1815),
RESET (MXD1812/MXD1817) to GND.... -0.3V to (VCC + 0.3V)
Open-Drain RESET (MXD1811/MXD1816)
Output Current (RESET, RESET).......................................20mA
Continuous Power Dissipation (TA = +70°C)
3-Pin SC70 (derate 2.17mW above +70°C)................174mW
3-Pin SOT23 (derate 4mW/°C above +70°C)..............320mW
to GND..............................................................-0.3V to +6.0V
Operating Temperature Range .........................-40°C to +105°C
Open-Drain RESET (MXD1813/MXD1818)
Junction Temperature......................................................+150°C
to GND.................................................. -0.3V to (VCC + 0.3V)
Input Current (VCC, RESET)..............................................20mA
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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 specified. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Supply Voltage Range
Supply Current
Reset Threshold
Active Reset-Timeout Period
VCC to Reset Delay
Push-Button Detect to Reset
Push-Button Reset-Timeout Period
Input Low Voltage
Input High Voltage
RESET Output Source Current
RESET Output Source Current
SYMBOL
VCC
ICC
VTH
tRP
tRD
tPB
tPBRST
VIL
VIH
IOH
CONDITIONS
TA = 0°C to +105°C
TA = -40°C to +105°C
VCC = +5.5V, VCC > VTH, no load
VCC = +3.6V, VCC > VTH, no load
MXD181_ _ R46
MXD181_ _ R44
MXD181_ _ R41
MXD181_ _ R31
MXD181_ _ R29
MXD181_ _ R26
MXD181_ _ R23
MXD181_ _ R22
VCC rising
VCC = (VTH + 100mV) falling to (VTH - 200mV)
VCC rising, tR = 5μs
MXD1813/MXD1818 only
MXD1813/MXD1818 only
MXD1813/MXD1818 TA = +25°C to +105°C
only TA = -40°C to +25°C
MXD1813/MXD1818 only
VCC ≥ VTH(MAX), reset not asserted,
MXD1810/MXD1815
IOH
VCC ≥ VTH(MAX), reset asserted,
MXD1812/MXD1817
MIN
1.0
1.2
4.50
4.25
4.00
2.98
2.80
2.47
2.25
2.12
100
100
1.5
100
TYP
9
4
4.62
4.37
4.12
3.06
2.88
2.55
2.31
2.18
150
2
150
150
0.7 × VCC
350
350
RESET Output Sink Current
VCC ≥ 2.7V, reset asserted, VOUT = 0.4V
IOL MXD1810/MXD1811/MXD1813/MXD1815/
MXD1816/MXD1818 (Note 2)
10
RESET Output Sink Current
IOL
VCC ≥ 2.7V, reset not asserted, VOUT = 0.4V
MXD1812/MXD1817
10
MAX
5.5
5.5
16
10
4.75
4.49
4.24
3.15
2.97
2.64
2.37
2.25
250
5
250
250
0.34
0.15
UNITS
V
µA
V
ms
µs
ms
µs
ms
V
V
μA
μA
mA
mA
www.maximintegrated.com
Maxim Integrated │2


Part Number MXD1815
Description Low-Power uP Reset Circuits
Maker Maxim Integrated
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MXD1815 Datasheet PDF






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