Reset Circuits with Manual Reset Input Ultra Supply Current 1µA(t

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Reset Circuits with Manual Reset Input Ultra Supply Current 1µA(t

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AIC811/AIC812
Reset Circuits with Manual Reset Input
Ultra Supply Current 1µA(typ.) Guaranteed Reset Valid Vcc=0.9V Available Output Types: Push-Pull Active (AIC811), Push-Pull Active High (AIC812) 140ms Min. Power-On Reset Pulse Width Internally Fixed Threshold 2.3V, 2.6V, 2.9V, 3.1V, 4.0V, 4.4V, 4.6V Tight Voltage Threshold Tolerance: 1.5% profile Package: SOT-23-5
These devices perform valid singles applications with ranging from 6.0V down 0.9V. reset
DESCRIPTION
AIC811/AIC812 low-power microprocessor (µP) supervisory circuits used monitor power supplies digital systems. They provide applications with benefits circuit reliability cost eliminating external components. AIC811/AIC812 also offer manual reset input.
APPLICATIONS
Notebook Computers Digital Still Cameras PDAs Critical Microprocessor Monitoring
signal lasts minimum period 140ms whenever supply voltage falls below preset threshold. Both AIC811 AIC812 were designed with reset comparator help identify invalid signals, which last less than 140ms. only difference between them that they have active-low RESET output active-high RESET output, respectively.
supply current (1µA) makes AIC811/AIC812 ideal portable equipment. devices available SOT-23-5 package.
TYPICAL APPLICATION CIRCUIT
AIC811 (AIC812) RESET (RESET) RESET INPUT
Pushbutton Switch
Analog Integrations Corporation
Si-Soft Research Center 3A1, No.1, Li-Hsin Science Park, Hsinchu 300, Taiwan, R.O.C. TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw
DS-811P-03 010405
AIC811/AIC812
ORDERING INFORMATION
AIC811-XXXXXX AIC812-XXXXXX PACKING TYPE TAPE REEL PACKAGE TYPE SOT-23-5 COMMERCIAL LEAD FREE COMMERCIAL RESET THRESHOLD VOLTAGE 2.3V 2.6V 2.9V 3.1V 4.0V 4.4V 4.6V (Additional voltage versions with unit 0.1V within voltage range from 1.5V 5.5V this product line available demand with prior consultation with AIC.) Example: AIC811-31CVTR 3.1V version, SOT-23-5 Package Tape Reel Packing Type AIC811-31PVTR 3.1V version, Lead Free SOT-23-5 Package Tape Reel Packing Type CONFIGURATION SOT-23-5 VIEW RESET (RESET)
SOT-23-5 Marking
Part AIC811-23CV AIC811-26CV AIC811-29CV AIC811-31CV AIC811-40CV AIC811-44CV AIC811-46CV Marking BQ23 BQ26 BQ29 BQ31 BQ40 BQ44 BQ46 Part AIC812-23CV AIC812-26CV AIC812-29CV AIC812-31CV AIC812-40CV AIC812-44CV AIC812-46CV Marking BR23 BR26 BR29 BR31 BR40 BR44 BR46
AIC811/AIC812
Part AIC811-23PV AIC811-26PV AIC811-29PV AIC811-31PV AIC811-40PV AIC811-44PV AIC811-46PV Marking BQ23P BQ26P BQ29P BQ31P BQ40P BQ44P BQ46P Part AIC812-23PV AIC812-26PV AIC812-29PV AIC812-31PV AIC812-40PV AIC812-44PV AIC812-46PV Marking BR23P BR26P BR29P BR31P BR40P BR44P BR46P
ABSOLUTE MAXIMUM RATINGS
RESET, RESET Input Current (VCC, Output Current (RESET RESET Continuous Power Dissipation +70°C) Operating Junction Temperature Range Junction Temperature Storage Temperature Range Lead Temperature (Soldering) -0.3V ~6.5V -0.3V (VCC+0.3V) 20mA 20mA 320mW -40°C 85°C 125°C 65°C 150°C 260°C
Absolute Maximum Ratings those values beyond which life device impaired.
TEST CIRCUIT
RESET
AIC811 Pushbuttom Switch
AIC811/AIC812
ELECTRICAL CHARACTERISTICS
(Typical values TA=25°C, unless otherwise specified) (Note PARAMETER Operating Voltage Range Supply Current
SYMBOL
TEST CONDITIONS +0.1V AIC811-23 AIC811-26 AIC811-29 TA=+25°C -40°C +85°C TA=+25°C -40°C +85°C TA=+25°C -40°C +85°C TA=+25°C -40°C +85°C TA=+25°C -40°C +85°C TA=+25°C -40°C +85°C TA=+25°C TA=-40°C +85°C
MIN.
TYP.
MAX. 2.335 2.346 2.639 2.652 2.944 2.958 3.147 3.162 4.060 4.080 4.466 4.488 4.669 4.692
UNIT
2.265 2.254 2.561 2.548 2.857 2.842 3.054 3.038 3.940 3.920 4.334 4.312 4.531 4.508
Reset Threshold
AIC811-31 AIC811-40 AIC811-44 AIC811-46
Reset Delay Reset Active Timeout Period
VCC=VTH (VTH -0.1V), VTH=3.1V TA=+25°C VTH(MAX) -40°C +85°C Vcc=6V 0.7VCC
1030
Reset Propagation
Delay
Input Threshold Pull-Up Resistance RESET Output Voltage
0.25VCC 0.2Vcc 0.8VCC 0.2Vcc VCC=VTH+0.1V, ISOURCE=1mA VCC=VTH 0.1V, ISINK=1mA VCC=VTH+0.1V, ISOURCE=1mA VCC=VTH 0.1V, ISINK=1mA 0.8VCC
RESET Output Voltage
Note1: Specifications production tested TA=25°C. Specifications over -40°C 85°C operating temperature range assured design, characterization correlation with Statistical Quality Controls (SQC). Note2: RESET output AIC811; RESET output AIC812.
AIC811/AIC812
TYPICAL PERFORMANCE CHARACTERISTICS
Power-Down Reset Delay (µS)
VTH=2.3V
VTH=2.3V VOD=VTH-VCC
Supply Current (µA)
VTH=3.1V VTH=4.6V
VOD=50mV VOD=100mV VOD=200mV
Temperature (°C) Supply Current Temperature
Temperature (°C) Power-Down Reset Delay Temperature
Power-Down Reset Delay (µS)
Power-Down Reset Delay (µS)
VTH=3.1V VOD=VTH-VCC
VOD=50mV
VTH=4.6V VOD=VTH-VCC
VOD=50mV
VOD=100mV
VOD=100mV VOD=200mV
VOD=200mV
Temperature (°C) Power-Down Reset Delay Temperature
Temperature (°C) Power-Down Reset Delay Temperature
Normalized Reset Threshold
1.010 1.005 1.000 0.995 0.990 0.985
VTH=4.6V
Power-Up Reset Timeout (mS)
1.015
VTH=3.1V
VTH=3.1V
VTH=4.6V
VTH=2.3V
VTH=2.3V
Temperature (°C) Normalized Reset Threshold Temperature
Temperature (°C) Power-Up Reset Timeout Temperature
AIC811/AIC812
BLOCK DIAGRAM
RESET (RESET)
Bandgap
Reset Generator
RPULL_UP
DESCRIPTIONS
RESET (AIC811) RESET (AIC812)
Ground. Active output pin. RESET Output remains while below reset threshold. Active high output pin. RESET output remains high while below reset threshold. Logic manual reset input. This active-low input internal pull-up resistor. driven CMOS, shorted ground with switch. Leave open when unused. Supply voltage.
DETAILED DESCRIPTIONS TECHNICAL TERMS
RESET OUTPUT will activated valid reset state. These supervisory circuits assert reset prevent code execution errors during power-up, power-down, brownout conditions.
RESET guaranteed logic
VTH>VCC>0.9V. Once exceeds reset threshold, internal timer keeps RESET reset timeout period; after this interval, RESET goes high.
brownout condition occurs (VCC drops below reset threshold), RESET goes low. time goes below reset threshold, internal timer resets zero, RESET goes low. internal timer activated after returns above reset threshold, RESET remains reset timeout period. manual reset input also initiate reset. AIC812 active-high RESET output that inverse AIC811's RESET output.
AIC811/AIC812
MANUAL RESET INPUT Many P-based products require manual reset capability, allowing operators, test technicians, external logic circuitry initiate reset. Logic asserts reset. Reset will remain asserted Reset Active Timeout Period (tRP) after returns high. This input internal pull-up resistor, floating used. driven with CMOS-logic levels, with open-drain/collector outputs. Another alternative connect normal switch from create manual reset function. Connecting 0.1µF capacitor from ground provide noise immunity prevent noise caused long cables noisy environment. BENEFITS HIGHLY ACCURATE RESET THRESHOLD AIC811/812 with specified voltage 5V±10% 3V±10% ideal systems using 5V±5% power supply. reset guaranteed assert after power supply falls regulation, before power drops below minimum specified operating voltage range system ICs. pre-trimmed thresholds reducing range over which undesirable reset occur.
APPLICATION INFORMATION
NEGATIVE-GOING TRANSIENTS addition issuing reset during power-up, power-down, brownout conditions, AIC811 series relatively resistant short-duration negative-going transient. ENSURING VALID RESET OUTPUT DOWN VCC=0 When falls below 0.9V, AIC811 RESET output longer sinks current; becomes open circuit. this case, high-impedance CMOS logic inputs connecting RESET drift undetermined voltages. Therefore, AIC811/2 with CMOS perfect most applications below 0.9V. However applications where
RESET must valid down adding
pull-down resistor RESET causes leakage currents flow ground, holding RESET low. INTERFACING WITH BIDIRECTIONAL RESET PINS with bidirectional reset pins contend with AIC811/812 reset outputs. AIC811 RESET output asserted high wants pull low, indeterminate logic levels occur. correct such cases, connect resistor between AIC811 RESET AIC812 RESET) output theP reset I/O. Buffer reset output other system components.
AIC811/AIC812
PHYSICAL DIMENSIONS (unit:
SOT-23-5
SOT-25 MILLIMETERS MIN. 0.95 0.05 0.90 0.30 0.08 2.80 2.60 1.50 0.95 1.90 0.30 0.60 0.60 MAX. 1.45 0.15 1.30 0.50 0.22 3.00 3.00 1.70
VIEW
WITH PLATING
BASE METAL SECTION
0.25
VIEW GAUGE PLANE SEATING PLANE
Note:
Information provided believed accurate reliable. However, cannot assume responsibility circuitry other than circuitry entirely embodied product; infringement patents other rights third parties that result from use. reserve right change circuitry specifications without notice. Life Support Policy: does authorize product life support devices and/or systems. Life support devices systems devices systems which, intended surgical implant into body (ii) support sustain life, whose failure perform, when properly used accordance with instructions provided labeling, reasonably expected result significant injury user.

Reset Circuits with Manual Reset Input Ultra Supply Current 1µA(t

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