PROCESSOR SUPERVISORY CIRCUITS Power-on reset generator with fixe

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PROCESSOR SUPERVISORY CIRCUITS Power-on reset generator with fixe

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APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
Power-on reset generator with fixed delay time 200ms Manual reset input (APX823/APX825A) Reset output available active-Low (APX823/APX824/APX825A), active-high (APX824/APX825A) Supply voltage supervision range 2.5V, 3.3V, Watchdog timer Supply current (Typ.) Temperature range: -40°C 85°C SOT25 SOT26: Available "Green" Molding Compound Lead Free Finish/RoHS Compliant (Note
General Description
APX823/APX824/APX825A family supervisors provides circuit initialization timing supervision, primarily processor-based systems. During power-on,
RESET
asserted when supply voltage becomes higher than 1.1V. Thereafter, supply voltage supervisor
monitors keeps RESET active long remains below threshold voltage VTH-. internal timer delays return output inactive state (high) ensure proper system reset. delay time ,td, starts after risen above threshold voltage VTH-. When supply voltage drops below threshold voltage VTH-, output becomes active (low) again. external components required. devices this family have fixed-sense threshold voltage VTH- internal voltage divider. APX823/APX825A devices incorporate manual reset input, level causes RESET become active. APX824/APX825A devices include high-level output RESET. APX823/APX824/APX825A have watchdog timer that periodically triggered positive negative transition WDI. When supervising system fails retrigger watchdog circuit within time-out interval, ttout, RESET becomes active time period This event also reinitializes watchdog timer. Leaving unconnected disables watchdog. applications where input active (transitioning high low) when APX823/APX824/APX825A asserting
RESET APX823/APX824/APX825A does return non-reset state when input voltage above
product spectrum designed supply voltage 2.5V, 3.3V circuits available SOT25 SOT26 packages. APX823/APX824/APX825A devices characterized operation over temperature range
Applications
Applications Using DSPs, Microcontrollers, Microprocessors Industrial Equipment Programmable Controls Automotive Systems Portable/Battery-Powered Equipment Intelligent Instruments Wireless Communications Systems Notebook/Desktop Computers
APX823/APX824/APX825A Rev.
www.diodes.com
FEBRUARY 2009
Diodes Incorporated
APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
Ordering Information
APX82 Part APX823 APX824 APX825A Voltage 4.63 4.38 4.00 3.08 2.93 2.63 2.25 Package SOT25 SOT26 Green Green Packing Tape Reel
Device
APX823-XXW5G-7 APX824-XXW5G-7 APX825A-XXW6G-7
Notes:
Package Code
Packaging (Note SOT25 SOT25 SOT26
Tape Reel Quantity Part Number Suffix 3000/Tape Reel 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
(Top View) RESET APX823 SOT25
RESET RESET SOT25 APX824 (Top View)
RESET RESET SOT26 APX825A (Top View)
APX823/APX824/APX825A Rev.
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FEBRUARY 2009
Diodes Incorporated
APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
Descriptions
Name
RESET
Description
Ground Reset output Operating voltage input Watchdog input Manual reset
(RESET)
Absolute Maximum Ratings
(Over operating ambient temperature range, unless otherwise noted)*
Symbol VRESET
Parameter Human Body Model Protection Machine Model Protection Supply Voltage
RESET, RESET Input Current Maximum High Output Current Derating Factor Above 25oC Continuous Total Power Dissipation 25oC Power Rating 70oC Power Rating 85oC Power Rating
SOT25 SOT26 SOT25 SOT26 SOT25 SOT26 SOT25 SOT26
Operating Junction Temperature Range Storage Temperature Range
Rating -0.3 (VCC+0.3)
Unit
mW/°C
Stresses beyond those listed under "absolute maximum ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated under "recommended operating conditions" implied. Exposure absolute-maximum-rated conditions extended periods affect device reliability.
APX823/APX824/APX825A Rev.
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FEBRUARY 2009
Diodes Incorporated
APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
Recommended Operating Conditions
Symbol Parameter (VCC+0.3) Unit ns/V
Supply Voltage Input Voltage High-level Input Voltage Low-level Voltage Input Transition Rise Fall Rate Operating Ambient Temperature Range Rising Time (VCC 0~VT)
Electrical Characteristics
(Over recommended operating ambient temperature range, unless otherwise noted) Test Symbol Parameter Conditions APX823/APX824/APX825A VCC= VTH-+0.2V
-29/26/23 APX823/APX824/APX825A RESET -40/31 APX823/APX824/APX825A -46/44 APX824/APX825A -29/26/23 RESET APX824/APX825A -46/44/40/31 APX824/APX825A -29/26/23 RESET APX824/APX825A -40/31 Low-level Output Voltage APX824/APX825A -46/44 APX823/APX824/APX825A -29/26/23 APX823/APX824/APX825A RESET -40/31 APX823/APX824/APX825A -46/44 IOH=-20A VCC= VTH-+0.2V IOH=-30A
Typ.
Unit
High-level Output Voltage
VCC= VTH-+0.2V VCC-1.5V IOH=-120A 1.8V, -100A 1.8V, -150A VCC= VTH-+0.2V IOL=1mA VCC= VTH-+0.2V IOL=1.2mA VCC= VTH-+0.2V IOL=3mA VCC= VTH-0.2V IOL=1mA VCC= VTH-0.2V IOL=1.2mA VCC= VTH-0.2V IOL=3mA 1.1V, IOL=20A
VRESET
Notes:
Power-up Reset Voltage (see Note
lowest supply voltage which RESET becomes active. 15s/V.
APX823/APX824/APX825A Rev.
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FEBRUARY 2009
Diodes Incorporated
APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
Electrical Characteristics
(Continued)
(Over recommended operating ambient temperature range, unless otherwise noted) Symbol Parameter Test Conditions APX823/APX824/APX825A 2.21 APX823/APX824/APX825A 2.59 APX823/APX824/APX825A 2.88 APX823/APX824/APX825A -85oC 3.02 APX823/APX824/APX825A 3.93 4.31 Negative-going APX823/APX824/APX825A 4.56 Input Threshold APX823/APX824/APX825A VTHVoltage APX823/APX824/APX825A 2.20 (see Note APX823/APX824/APX825A 2.57 APX823/APX824/APX825A 2.86 APX823/APX824/APX825A -40oC -85oC 3.00 APX823/APX824/APX825A 3.92 APX823/APX824/APX825A 4.29 APX823/APX824/APX825A 4.54 APX823/APX824/APX825A APX823/APX824/APX825A APX823/APX824/APX825A Hysteresis Vhys APX823/APX824/APX825A Input APX823/APX824/APX825A APX823/APX824/APX825A APX823/APX824/APX825A Set-up Time (VTH 100mV) Average WDI=VCC, Time average IIH(AV) High-level Input (dc=88%) Current WDI=0.3V, Average VCC=5.5V time IIL(AV) Low-level Input average Current (dc=12%) High-level Input WDI=VCC Current Low-level Input WDI=0.3V, Current VCC=5.5V Supply Current Unconnected, Outputs unconnected Internal Pull-up Resistor VOUT Temperature Coefficient Input Capacitance Thermal Resistance Junction-to-Ambient Thermal Resistance Junction-to-Case 5.5V SOT25 (Note SOT26 (Note SOT25 (Note SOT26 (Note VTH-+0.2V
Typ. 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/oC
Notes:
ensure best stability threshold voltage, bypass capacitor (ceramic, 0.1F) should placed near supply terminals. RESET short-circuit current maximum pull-up current when RESET driven bidirectional reset pin. Test condition SOT25 SOT26: Devices mounted FR-4 substrate board, copper, with minimum recommended layout.
APX823/APX824/APX825A Rev.
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FEBRUARY 2009
Diodes Incorporated
APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
Timing requirements
Symbol Parameter
RL=1m, CL=50pF, TA=25oC)
Test Conditions
Typ.
Unit
Pulse Width
VCC> VTH-+0.2V, VIL=0.3 VCC, VIH=0.7 VCC> VTH-+0.2V, VIL=0.3 VCC, VIH=0.7
Switching Characteristics
Symbol Parameter
RL=1m, CL=50pF, TA=25oC)
ttout
tPHL
tPLH
Test Conditions VTH-+0.2V, Watchdog Time APX823/APX824/APX825A timing diagram VCC> VTH-+0.2V, Delay Time APX823/APX824/APX825A timing diagram VCC> VTH-+0.2V, Propagation (Delay) RESET VIL=0.3 VCC, Time, delay (APX823/APX825A) VIH=0.7 High-to-low-level VIL= VTH-0.2V, Output RESET delay VIH= VTH-+0.2V VCC> VTH-+0.2V, Propagation (Delay) RESET delay VIL=0.3 VCC, Time, (APX824/APX825A) VIH=0.7 Low-to-high-level RESET delay VIL= VTH-0.2V, Output (APX824/APX825A) VIH= VTH-+0.2V
Typ. Unit
1.12
APX823/APX824/APX825A Rev.
www.diodes.com
FEBRUARY 2009
Diodes Incorporated
APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
Application Circuit
RESET APX8XX
100nF
RESET Microprocessor
Functional Block Diagram
Watchdog Timer Logic
Reset Logic
Reset Reset
300K Vref Transition Detector APX824/APX825A APX823/APX825A
APX823/APX824/APX825A Rev.
www.diodes.com
FEBRUARY 2009
Diodes Incorporated
APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
Timing Diagram
RESET Timing Diagram
/RESET
RESET
RESET Timing Diagram
/RESET
RESET Timing Diagram
/RESET
APX823/APX824/APX825A Rev.
www.diodes.com
FEBRUARY 2009
Diodes Incorporated
APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
Typical 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
Supply Current Temperature (Vcc=3.3V Vth=2.93V)
Supply Curreny
Supply Current (uA)
Supply Current (uA)
1.5V 2.5V 3.3V 4.0V 5.0V 5.5V
Temperature
APX823/APX824/APX825A Rev.
www.diodes.com
FEBRUARY 2009
Diodes Incorporated
APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
Marking Information
SOT25
View
SOT26
Identification code Year Week 1~26 week; 27~52 week; represents week Green
View
Identification code Year Week 1~26 week; 27~52 week; represents week Green
Marking Table Device Package Type Identification Code
APX823-46W5 APX823-44W5 APX823-40W5 APX823-31W5 APX823-29W5 APX823-26W5 APX823-23W5 APX824-46W5 APX824-44W5 APX824-40W5 APX824-31W5 APX824-29W5 APX824-26W5 APX824-23W5 APX825A-46W6 APX825A-44W6 APX825A-40W6 APX825A-31W6 APX825A-29W6 APX825A-26W6 APX825A-23W6
SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT26 SOT26 SOT26 SOT26 SOT26 SOT26 SOT26
APX823/APX824/APX825A Rev.
www.diodes.com
FEBRUARY 2009
Diodes Incorporated
APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
Package Information
Package Type: SOT25
(All Dimensions
Package Type: SOT26
Notes:
Package outline dimensions shown Diodes Inc. package outline dimensions document AP02002, which found website
APX823/APX824/APX825A Rev.
www.diodes.com
FEBRUARY 2009
Diodes Incorporated
APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
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.
APX823/APX824/APX825A Rev.
www.diodes.com
FEBRUARY 2009
Diodes Incorporated

PROCESSOR SUPERVISORY CIRCUITS Power-on reset generator with fixe

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