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Chengdu Sino Microelectronics System
Chengdu Sino Microelectronics System

HWD803 Datasheet Preview

HWD803 Datasheet

3-Pin Microprocessor Reset Circuits

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HWD803 pdf
3-Pin Microprocessor Reset Circuits
General Description
The HWD803/HWD809/HWD810 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 HWD803 has an open-drain output stage, while the
HWD809/HWD810 have push-pull outputs. The
HWD803’s open-drain RESET output requires a pull-up
resistor that can be connected to a voltage higher than
VCC. The HWD803/HWD809 have an active-low RESET
output, while the HWD810 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 HWD803/HWD809/
HWD810 ideal for use in portable equipment. The
HWD803 is available in a 3-pin SC70 package, and the
HWD809/HWD810 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
HWD803
HWD809
RESET
RPULL-UP*
VCC
µP
RESET
INPUT
GND GND
*HWD803 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 (HWD803)
Push-Pull RESET Output (HWD809)
Push-Pull RESET Output (HWD810)
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
HWD803_EXR-T
-40°C to +125°C 3 SC70-3
HWD803_EXR-T10 -40°C to +125°C 3 SC70-3
HWD809_EXR-T
-40°C to +125°C 3 SC70-3
HWD809_EXR-T10 -40°C to +125°C 3 SC70-3
HWD809_EUR-T
-40°C to +105°C 3 SOT23-3
HWD809_EUR-T10 -40°C to +105°C 3 SOT23-3
HWD810_EXR-T
-40°C to +125°C 3 SC70-3
HWD810_EXR-T10 -40°C to +125°C 3 SC70-3
HWD810_EUR-T
-40°C to +105°C 3 SOT23-3
HWD810_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 HWD803_EXR-T for
2.5k reels and HWD803_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
HWD803
HWD809
HWD810
3 VCC
RESET (RESET) 2
( ) ARE FOR HWD810.
SC70-3/SOT23-3
HWD803 AVAILABLE IN SC70-3 ONLY.
1



Chengdu Sino Microelectronics System
Chengdu Sino Microelectronics System

HWD803 Datasheet Preview

HWD803 Datasheet

3-Pin Microprocessor Reset Circuits

No Preview Available !

HWD803 pdf
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
Rate of Rise, VCC ............................................................100V/µs
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
3-Pin SC70 .....................................................-40°C to +125°C
3-Pin SOT23...................................................-40°C to +105°C
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 (SOT23) or TA = -40°C to +125°C (SC70), 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
VCC Range
Supply Current (SOT23)
Supply Current (SC70)
Reset Threshold
(SOT only)
SYMBOL
CONDITIONS
TA = 0°C to +70°C
TA = -40°C to +105°C (HWD8_ _ _EUR)
TA = -40°C to +125°C (HWD8_ _ _EXR)
TA = -40°C VCC < 5.5V, HWD8_ _L/M
to +85°C
VCC < 3.6V, HWD8_ _R/S/T/Z
ICC TA = +85°C VCC < 5.5V, HWD8_ _L/M
to +105°C VCC < 3.6V, HWD8_ _R/S/T/Z
TA = -40°C VCC < 5.5V, HWD8_ _L/M
ICC
to +85°C
VCC < 3.6V, HWD8_ _R/S/T/Z
TA = +85°C VCC < 5.5V, HWD8_ _L/M
to +125°C VCC < 3.6V, HWD8_ _R/S/T/Z
TA = +25°C
HWD8_ _L TA = -40°C to +85°C
TA = -40°C to +125°C
TA = +25°C
HWD8_ _M TA = -40°C to +85°C
TA = -40°C to +125°C
TA = +25°C
HWD809J
(SOT only)
TA = -40°C to +85°C
VTH
TA = -40°C to +125°C
TA = +25°C
HWD8_ _T TA = -40°C to +85°C
TA = -40°C to +125°C
TA = +25°C
HWD8_ _S TA = -40°C to +85°C
TA = -40°C to +125°C
TA = +25°C
HWD8_ _R TA = -40°C to +85°C
TA = -40°C to +125°C
MIN
1.0
1.2
1.2
4.56
4.50
4.40
4.31
4.25
4.16
3.93
3.89
3.80
3.04
3.00
2.92
2.89
2.85
2.78
2.59
2.55
2.50
TYP MAX UNITS
5.5
5.5 V
5.5
24 60
17 50
100
100
µA
24 35
17 30
60
60
4.63 4.70
4.75
4.86
4.38 4.45
4.50
4.56
4.00 4.06
4.10
3.08
4.20
3.11
V
3.15
3.23
2.93 2.96
3.00
3.08
2.63 2.66
2.70
2.76
2


Part Number HWD803
Description 3-Pin Microprocessor Reset Circuits
Maker Chengdu Sino Microelectronics System
Total Page 9 Pages
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