4-Pin Microprocessor Supervisor With Manual Reset Precision Monit

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4-Pin Microprocessor Supervisor With Manual Reset Precision Monit

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APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
Precision Monitor of(2.5V/3.0V/3.3V/5.0V) power supply voltage Full specified over temperature Manual reset input Available four output configuration Push-pull RESET Active low(APX811) Push-pull RESET Active high(APX812) Power-on reset generator with fixed delay time 200ms SOT143: Available "Green" Molding Compound Lead Free Finish/RoHS Compliant (Note
General Description
APX811/812 used microprocessor supervisory circuit monitor power supplies These circuit 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. APX811/812 have push-pull outputs. APX811 active RESET output, while APX812 active high RESET output. APX811/812 devices incorporate manual reset input, level causes RESET become active. APX811/2 targeted 2.5V, 3.3V powered systems available with different threshold voltages meet exact needs system. They available space saving SOT143 package operate over whole industrial temperature range, 85°C.
Applications
Computers Controllers Intelligent Instruments Critical power Monitoring Portable/Battery powered Equipment Automotive
Typical Application Circuit
APX811/APX812
(Manual Reset) Push Botton RESET (RESET)
RESET Input
APX811/812 Rev. DS31960
www.diodes.com
OCTOBER 2009
Diodes Incorporated
APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
Ordering Information
Enable
Active-Low Active-High
Voltage
4.63 4.38 4.00 3.08 2.93 2.63 2.25
Package
SOT143
Green
Green
Packing
Tape Reel
Device
APX811-XXUG-7 APX812-XXUG-7
Notes:
Package Code
Packaging (Note
SOT143 SOT143
Tape Reel Quantity Part Number Suffix
3000/Tape Reel 3000/Tape Reel
Directive 2002/95/EC (RoHS). applicable RoHS exemptions applied. Please visit website layout shown Diodes Inc. suggested layout document AP02001, which found website
Assignments
View
RESET (RESET)
SOT143
Descriptions
Name
RESET (RESET)
Description Ground Reset output APX811 APX812 Operating Voltage Input Manual reset (Active Low)
APX811/812 Rev. DS31960
www.diodes.com
OCTOBER 2009
Diodes Incorporated
APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
Block Diagram
Vref
Driver Delay Circuit RESET
Absolute Maximum Ratings
Symbol Parameter Rating Unit
Human Body Model protection VRESET Machine Model Protection Supply voltage RESET Input Current, Output current Power dissipation
-0.3~7 -0.3 (Vcc+0.3)
Recommended Operating Conditions
Symbol Parameter Supply Voltage Input Voltage Operating Ambient Temperature (VCC+0.3) Unit
APX811/812 Rev. DS31960
www.diodes.com
OCTOBER 2009 Diodes Incorporated
APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
Electrical Characteristics
unless otherwise note. Typical values TA=+25 Symbol Parameter Test Conditions Range Supply Current 0.2V
Typ.
2.22 2.59 2.89 2.25 2.63 2.93 3.08 4.00 4.38 4.63
Unit
2.28 2.67 2.98 3.13 4.06 4.45 4.70
Reset threshold
3.03 3.94 4.31 4.56
Notes:
(Vth 100mV) -0.2, ISINK 1.2mA RESET Output Voltage -0.2, ISINK 3.2mA (APX811) 1.0V, ISINK 50uA +0.2, RESET Output Voltage-High ISOURCE 500uA (APX811) +0.2, ISOURCE 800uA +0.2, ISINK 1.2mA RESET Output Voltage-Low (APX812) +0.2, ISINK 3.2mA RESET Output Voltage-High 1.8V -0.2, (APX812) ISOURCE 150uA Thermal Resistance SOT143 (Note Junction-to-Ambient Thermal Resistance SOT143 (Note Junction-to-Case
Set-up Time
0.8VCC -1.5
Test condition SOT143: Device mounted FR-4 substrate, 1"*1", 2oz, copper, single-sided, boards.
Timing requirements
Symbol Parameter
(TA=25oC)
Test Conditions
Typ. Unit
Pulse Width
VCC> Vth-+0.2V, VIL=0.3 VCC, VIH=0.7
APX811/812 Rev. DS31960
www.diodes.com
OCTOBER 2009 Diodes Incorporated
APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
Switching Characteristics
Symbol
(TA=25oC)
Parameter
Test Conditions
Typ. Unit
Delay Time
APX811/812
tPHL
RESET Propagation (Delay) Time, delay (APX811/812) High-to-low-level Output RESET delay
RESET delay Propagation (Delay) Time, (APX811/812) Low-to-high-level Output RESET delay (APX811/812)
tPLH
VCC> Vth-+0.2V, timing diagram VCC> Vth-+0.2V, VIL=0.3 VCC, VIH=0.7 VIL= Vth-0.2V, VIH= Vth-+0.2V VCC> Vth-+0.2V, VIL=0.3 VCC, VIH=0.7 VIL= Vth-0.2V, VIH= Vth-+0.2V
Timing Diagram
RESET Timing Diagram
/RESET
RESET
RESET Timing Diagram
/RESET
APX811/812 Rev. DS31960
www.diodes.com
OCTOBER 2009 Diodes Incorporated
APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
Typical Performance Characteristics
RESET Timeout Period Temperature
RESET Threshold Voltage Temperature RESET Thershold Voltage
RESET Timeout Period (ms)
3.15 3.05 2.95 2.85
Temperature
Temperature
Supply Current Temperature (Vcc=3.3V Vth=2.93V)
Supply Curreny
Supply Current (µA)
Supply Current (µA)
1.5V 2.5V 3.3V 4.0V 5.0V 5.5V
Temperature
APX811/812 Rev. DS31960
www.diodes.com
OCTOBER 2009 Diodes Incorporated
APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
Application Information
microprocessor's (µP's) reset input starts known state. APX811/812 asserts reset prevent code-execution errors during power-up, power-down, brownout conditions. They assert reset signal whenever supply voltage declines below preset threshold brought low, keeping asserted least 240ms after risen above reset threshold. APX811/812 have push-pull output stage. APX811/812 reset output guaranteed logic APX811 high APX812 Once exceeds reset threshold, internal timer keeps RESET output (and RESET high APX812) reset timeout period. After this interval, APX811's RESET output goes high (APX812's RESET output goes low). brownout condition occurs (VCC dips below reset threshold), APX811's RESET output goes (APX812's RESET output goes high). time goes below reset threshold, internal timer resets zero, RESET goes (RESET goes high). internal timer starts after returns above reset threshold, RESET remains (RESET remains high) reset timeout period. Ensuring Valid Reset Output Down When falls below APX811 RESET longer sinks current- becomes open circuit. Therefore, 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 pull down resistor RESET causes stray leakage currents flow ground, holding RESET low. R1's value critical; 100k large enough load RESET small enough pull RESET ground. APX812 RESET required remain valid then 100k pull-up resistor between RESET recommended. 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.
APX811/812 Rev. DS31960
www.diodes.com
OCTOBER 2009 Diodes Incorporated
APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
Marking Information
SOT143
View
Identification code Year Week 1~26 week; 27~52 week; represents week Green
Device APX811-46U APX811-44U APX811-40U APX811-31U APX811-29U APX811-26U APX811-23U APX812-46U APX812-44U APX812-40U APX812-31U APX812-29U APX812-26U APX812-23U
Package SOT143 SOT143 SOT143 SOT143 SOT143 SOT143 SOT143 SOT143 SOT143 SOT143 SOT143 SOT143 SOT143 SOT143
Identification Code
APX811/812 Rev. DS31960
www.diodes.com
OCTOBER 2009 Diodes Incorporated
APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
Package Information
Package Type: SOT143
(All Dimensions
1.78/2.03
0.45/0.6
0.89/1.0
0.085/0.18
1.58/1.83
1.20/1.40
2.28/2.48
0.013/0.10
2.80/3.0
APX811/812 Rev. DS31960
www.diodes.com
0.77/0.93
0.37/0.51
0.46/0.6
OCTOBER 2009 Diodes Incorporated
APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
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APX811/812 Rev. DS31960
www.diodes.com
OCTOBER 2009 Diodes Incorporated

4-Pin Microprocessor Supervisor With Manual Reset Precision Monit

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