3-PIN MICROPROCESSOR RESET CIRCUITS Precision Monitoring +2.5V, +
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APX809/810
3-PIN MICROPROCESSOR RESET CIRCUITS
Precision Monitoring +2.5V, +3V, +3.3V, Power-Supply Voltages Fully Specified Over Temperature Available three Output Configurations Push-Pull RESET Active (APX809) Push-Pull RESET Active High (APX810) 200ms Power-On Reset Pulse Width 30µA Supply Current (Typ.) Guaranteed Reset Valid External Components SOT23 SOT23R: Available "Green" Molding Compound Lead Free Finish/RoHS Compliant (Note
General Description
APX809/810 used microprocessor (µP) supervisory circuits monitor power supplies digital systems. They provide excellent circuit reliability cost eliminating external components adjustments when used with +5V, +3.3V, +3.0V powered circuits. These circuits perform single function: they assert reset signal whenever supply voltage declines below preset threshold, keeping asserted least 240ms after risen above reset threshold. Reset thresholds suitable operation with variety supply voltages available. APX809/810 have push pull outputs. APX809 have active RESET output, while APX810 active high RESET output. reset comparator designed ignore fast transients VCC, outputs guaranteed correct logic state down supply current makes APX809/810 ideal portable equipment. APX809/810 available 3-pin SOT23 SOT23R package.
Applications
Computers Controllers Intelligent Instruments Critical Power Monitoring Portable/Battery Powered Equipment Automotive
Ordering Information
Enable
Active-Low Active-High
Voltage
4.63 4.38 4.00 3.08 2.93 2.63 2.25
Package
SOT23 SOT23R
Lead Free
Green
Packing
Taping
Device
APX809-XXSA APX810-XXSA APX809-XXSR APX810-XXSR
Notes:
Package Code
Packaging (Note
SOT23 SOT23 SOT23R SOT23R
Quantity
Tape Reel Part Number Suffix
3000/Tape Reel 3000/Tape Reel 3000/Tape Reel 3000/Tape Reel
RoHS revision 13.2.2003. Glass high temperature solder exemptions applied, Directive Annex Notes layout shown Diodes Inc. suggested layout document AP02001, which found website
APX809/810 Rev.
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APX809/810
3-PIN MICROPROCESSOR RESET CIRCUITS
Assignments
View
View
APX809 APX810
RESET (RESET)
APX809 APX810
RESET (RESET)
SOT23
SOT23R
Descriptions
Name
RESET (RESET)
Description Ground Reset Output APX809 APX810 Operating Voltage Input
Absolute Maximum Ratings
Symbol VRESET Supply Voltage RESET, RESET (push-pull) Input Current, Output Current, RESET, RESET Continuous Power Dissipation +70°C), de-rate 4mW/°C above +70°C Operating Junction Temperature Range Storage Temperature Range Parameter Rating -0.3 +6.0 -0.3 (VCC 0.3) +105 +150 Unit
APX809/810 Rev.
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APX809/810
3-PIN MICROPROCESSOR RESET CIRCUITS
Recommended Operating Conditions
Symbol Parameter Human Body Model Protection Machine Model Protection Supply Voltage Input Voltage Operating Ambient Temperature Range Rising Time (Vcc 0~VT) (VCC+0.3) Unit
Electrical Characteristics
unless otherwise note. Typical values TA=+25 Symbol Parameter Test Conditions Range +70oC Supply Current 0.2V APX809/810-23 APX809/810-26 APX809/810-29 APX809/810-31 C-85 APX809/810-40 APX809/810-44 Reset APX809/810-46 Threshold APX809/810-23 APX809/810-26 APX809/810-29 APX809/810-31 C-85 APX809/810-40 APX809/810-44 APX809/810-46 Reset Threshold Tempco Set-up Time (VTH 100mV) TDELAY Reset Active Timeout Period +85oC -0.2, ISINK 1.2mA RESET Output Voltage -0.2, ISINK 3.2mA (APX809) 1.0V, ISINK 50uA +0.2, RESET Output Voltage-High ISOURCE 500uA +0.2, (APX809) ISOURCE 800uA RESET Output Voltage-Low +0.2, ISINK 1.2mA (APX810) +0.2, ISINK 3.2mA RESET Output Voltage-High 1.8V -0.2, (APX810) ISOURCE 150uA Thermal Resistance SOT23/SOT23R (Note Junction-to-Ambient Thermal Resistance SOT23/SOT23R (Note Junction-to-Case
Notes:
2.21 2.59 2.88 3.02 3.93 4.31 4.56 2.20 2.57 2.86 3.00 3.92 4.29 4.54
2.25 2.63 2.93 3.08 4.00 4.38 4.63 2.25 2.63 2.93 3.08 4.00 4.38 4.63
2.30 2.69 3.00 3.15 4.08 4.47 4.72 2.30 2.69 3.00 3.15 4.08 4.47 4.72
Unit
ppm/
0.8VCC -1.5
Test condition SOT23/ SOT23R: Devices mounted FR-4 substrate board, copper, with minimum recommended layout.
APX809/810 Rev.
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MARCH 2008
Diodes Incorporated
APX809/810
3-PIN MICROPROCESSOR RESET CIRCUITS
Typical Application Circuit
100nF
APX8XX
RESET (RESET)
Microprocessor
RESET INPUT
Functional Description
microprocessor's (µP's) reset input starts known state. APX809/810 assert reset prevent code-execution errors during power-up, power-down, brownout conditions. They assert reset signal whenever supply voltage declines below preset threshold, keeping asserted least 240ms after risen above reset threshold. APX809/810 have push-pull output stage. Ensuring Valid Reset Output Down high-impedance CMOS logic inputs connected RESET drift undetermined voltages. This presents problem most applications since most other circuitry inoperative with below However, applications where
RESET must valid down adding RESET
causes stray leakage
pull down resistor
currents flow ground, holding
RESET
low. R1's value
RESET
guaranteed logic Once
critical; 100k large enough load small enough pull
RESET
exceeds reset threshold, internal timer keeps
RESET
reset timeout period; after this interval, RESET goes high. brownout condition occurs (VCC dips below reset threshold), RESET goes low. time goes below reset threshold, internal timer resets zero,
RESET ground. RESET required remain valid
APX810
RESET
RESET
goes low. internal timer starts after
returns above reset threshold, reset timeout period.
RESET
remains
Benefits Highly Accurate Reset Threshold Most supervisor reset threshold voltages between below value nominal supply voltages. This ensures reset will occur within nominal supply, will occur when supply below nominal. When using rated only nominal supply ±5%, this leaves zone uncertainty where supply between low, where reset asserted.
When falls below APX809 RESET output longer sinks current-it becomes open circuit. Therefore,
APX809/810 Rev.
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Diodes Incorporated
APX809/810
3-PIN MICROPROCESSOR RESET CIRCUITS
Block Diagram
Driver Delay Circuit VREF RESET RESET
APX809/810 Rev.
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Diodes Incorporated
APX809/810
3-PIN MICROPROCESSOR RESET CIRCUITS
Performance Characteristics
RESET Timeout Period Temperature
RESET Threshold Voltage Temperature
RESET Timeout Period (mS)
RESET Thershold Voltage
3.15 3.05 2.95 2.85
Temperature
Temperature
Figure
Supply Current Temperature (Vcc=3.3V Vth=2.93V)
Figure
Supply Current
Supply Current (uA)
Supply Current (uA)
1.5V 2.5V 3.3V 4.0V 5.0V 5.5V
Temperature
Figure
Figure
APX809/810 Rev.
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MARCH 2008
Diodes Incorporated
APX809/810
3-PIN MICROPROCESSOR RESET CIRCUITS
Timing Diagram
TDelay /RESET
TDelay
TDelay RESET
TDelay
APX809/810 Rev.
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MARCH 2008
Diodes Incorporated
APX809/810
3-PIN MICROPROCESSOR RESET CIRCUITS
Marking Information
SOT23/SOT23R
View
Device APX809-46SA APX809-44SA APX809-40SA APX809-31SA APX809-29SA APX809-26SA APX809-23SA APX810-46SA APX810-44SA APX810-40SA APX810-31SA APX810-29SA APX810-26SA APX810-23SA APX809-46SR APX809-44SR APX809-40SR APX809-31SR APX809-29SR APX809-26SR APX809-23SR APX810-46SR APX810-44SR APX810-40SR APX810-31SR APX810-29SR APX810-26SR APX810-23SR
Identification code Year Month Green
Package SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R Identification Code
APX809/810 Rev.
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Diodes Incorporated
APX809/810
3-PIN MICROPROCESSOR RESET CIRCUITS
Package Information
(All Dimensions
Package Type: SOT23/SOT23R
Notes:
Package outline dimensions shown Diodes Inc. package outline dimensions document AP02002, which found website
IMPORTANT NOTICE Diodes Incorporated subsidiaries reserve right make modifications, enhancements, improvements, corrections other changes without further notice product herein. Diodes Incorporated does assume liability arising application product described herein; neither does convey license under patent rights, rights others. user products such applications shall assume risks such will agree hold Diodes Incorporated companies whose products represented website, harmless against damages. LIFE SUPPORT Diodes Incorporated products authorized critical components life support devices systems without expressed written approval President Diodes Incorporated.
APX809/810 Rev.
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Diodes Incorporated
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