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19-2336; Rev 0; 1/02
Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
General Description
The MAX6412-MAX6420 low-power microprocessor supervisor circuits monitor system voltages from 1.6V to 5V. These devices are designed to assert a reset signal whenever the VCC supply voltage or RESET IN falls below its reset threshold or the manual reset input is asserted. The reset output remains asserted for the reset timeout period after VCC and RESET IN rise above the reset threshold and the manual reset input is deasserted. The reset timeout is externally set by a capacitor to provide more flexibility. The MAX6412/MAX6413/MAX6414 feature fixed thresholds from 1.575V to 5V in approximately 100mV increments and a manual reset input. The MAX6415/MAX6416/MAX6417 are offered with an adjustable reset input that can monitor voltages down to 1.26V and the MAX6418/MAX6419/ MAX6420 are offered with one fixed input and one adjustable input to monitor dual-voltage systems. The MAX6412/MAX6415/MAX6418 have an active-low, push-pull reset output. The MAX6413/MAX6416/ MAX6419 have an active-high, push-pull reset output and the MAX6414/MAX6417/MAX6420 have an activelow, open-drain reset output. All of these devices are offered in a SOT23-5 package and are fully specified from -40C to +125C.
Features
o Monitor System Voltages from 1.6V to 5V o Capacitor-Adjustable Reset Timeout Period o Manual Reset Input (MAX6412/MAX6413/MAX6414) o Adjustable Reset Input Option (MAX6415-MAX6420) o Dual-Voltage Monitoring (MAX6418/MAX6419/MAX6420) o Low Quiescent Current (1.7A typ) o 3 RESET Output Options Push-Pull RESET Push-Pull RESET Open-Drain RESET o Guaranteed Reset Valid to VCC = 1V o Power-Supply Transient Immunity o Small SOT23-5 Packages
MAX6412-MAX6420
Ordering Information
PART MAX6412UK_ _-T MAX6413UK_ _-T MAX6414UK_ _-T MAX6415UK-T MAX6416UK-T MAX6417UK-T MAX6418UK_ _-T MAX6419UK_ _-T MAX6420UK_ _-T TEMP RANGE -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C PIN-PACKAGE 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5
Applications
Automotive Medical Equipment Intelligent Instruments Portable Equipment Battery-Powered Computers/Controllers Embedded Controllers Critical P Monitoring Set-Top Boxes Computers
Pin Configuration
TOP VIEW
RESET/RESET 1 5 VCC
GND 2
MAX6412- MAX6420
4 SRT
Note: The MAX6412/MAX6413/MAX6414 and MAX6418/ MAX6419/MAX6420 are available with factory-set VCC reset thresholds from 1.575V to 5.0V in approximately 0.1V increments. Insert the desired nominal reset threshold suffix (from Table 1) into the blanks following the letters UK. There are 33 standard versions with a required order increment of 2500 pieces. Sample stock is generally held on standard versions only (see Standard Versions Table). Required order increment is 10,000 pieces for nonstandard versions. Contact factory for availability. All devices are available in tape-and-reel only. Typical Operating Circuit appears at end of data sheet. Selector Guide appears at end of data sheet.
RESET IN (MR) 3
SOT23-5
( ) FOR THE MAX6412/MAX6413/MAX6414
________________________________________________________________ Maxim Integrated Products
1
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Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
MAX6412-MAX6420
ABSOLUTE MAXIMUM RATINGS
All Voltages Referenced to GND VCC ........................................................................-0.3V to +6.0V SRT, MR, RESET IN ....................................-0.3V to (VCC + 0.3V) RESET, RESET (Push-Pull) .........................-0.3V to (VCC + 0.3V) RESET (Open-Drain) .............................................-0.3V to +6.0V Input Current (All Pins) .....................................................20mA Output Current (RESET, RESET) ......................................20mA Continuous Power Dissipation (TA = +70C) 5-Pin SOT23-5 (derate 7.1mW/C above +70C) ........571mW Operating Temperature Range .........................-40C to +125C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
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 = 1V to 5.5V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at VCC = 5V and TA = +25C.) (Note 1)
PARAMETER Supply Voltage Range Supply Current SYMBOL VCC VCC 5.0V ICC VCC 3.3V VCC 2.0V TA = +25C VCC Reset Threshold Accuracy VTH TA = 0C to +125C TA = -40C to 0C Hysteresis VCC to Reset Delay Reset Timeout Period VSRT Ramp Current VSRT Ramp Threshold RAMP Threshold Hysteresis RESET Output Voltage LOW VOL VHYST tRD tRP IRAMP VTH-RAMP VCC falling at 1mV/s CSRT = 1500pF CSRT = 0 VSRT = 0 to 0.65V; VCC = 1.6V to 5V VCC = 1.6V to 5V (VRAMP rising) VRAMP falling threshold VCC 1.0V, ISINK = 50A VCC 2.7V, ISINK = 1.2mA VCC 4.5V, ISINK = 3.2mA RESET Output Voltage HIGH, (Push-Pull) RESET Output Leakage Current, (Open-Drain) VCC 1.8V, ISOURCE = 200A VOH VCC 2.25V, ISOURCE = 500A VCC 4.5V, ISOURCE = 800A ILKG VCC > VTH, reset not asserted VCC 1.0V, ISOURCE = 1A RESET Output Voltage HIGH VOH VCC 1.8V, ISOURCE = 150A VCC 2.7V, ISOURCE = 500A VCC 4.5V, ISOURCE = 800A 0.8 VCC 0.8 VCC 0.8 VCC 0.8 VCC V 0.8 VCC 0.8 VCC 0.8 VCC 1.0 A V 3.35 VTH 1.5% VTH 2.5% VTH 3.5% 3 VTH 100 4.375 0.275 240 0.65 33 0.3 0.3 0.4 V 5.40 CONDITIONS MIN 1.0 2.7 2 1.7 TYP MAX 5.5 4.5 3.5 2.5 VTH + 1.5% VTH + 2.5% VTH + 3.5% A UNITS V
V
mV s ms nA V mV
2
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Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 1V to 5.5V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at VCC = 5V and TA = +25C.) (Note 1)
PARAMETER RESET Output Voltage LOW RESET IN Leakage Current RESET IN Threshold RESET IN Hysteresis VIL MR Input VIH VIL VIH MR Minimum Pulse Width MR Glitch Rejection MR to RESET Delay MR Pullup Resistance Pull up to VCC 12 VCC > 4.0V VCC < 4.0V 2.4 0.3 VCC 0.7 VCC 1 75 50 20 28 s ns s k VRST VRST falling, VCC = 1.6V to 5.0V 1.212 1.263 25 0.8 V SYMBOL VOL CONDITIONS VCC 1.8V, ISINK = 500A VCC 2.7V, ISINK = 1.2mA VCC 4.5V, ISINK = 3.2mA MIN TYP MAX 0.3 0.3 0.4 10 1.313 nA V mV V UNITS
MAX6412-MAX6420
Note 1: Devices production tested at +25C. Over temperature limits are guaranteed by design.
Typical Operating Characteristics
(VCC = 5V, CSRT = 1500pF, TA = +25C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX6412-20 toc01
SUPPLY CURRENT vs. TEMPERATURE
MAX6412-20 toc02
RESET TIMEOUT PERIOD vs. CSRT
MAX6412-20 toc03
4 TA = +125C SUPPLY CURRENT (A) 3 TA = +25C 2 TA = -40C 1
3.5 3.0 SUPPLY CURRENT (A) 2.5 VCC = 3.3V 2.0 VCC = 1.8V 1.5 1.0 VCC = 1V 0.5 VCC = 5V
10,000
RESET TIMEOUT PERIOD (ms)
1000
100
10
1
0 0 1 2 3 4 5 6 SUPPLY VOLTAGE (V)
0 -50 -25 0 25 50 75 100 125 TEMPERATURE (C)
0.1 0.001
0.01
0.1
1 CSRT (nF)
10
100
1000
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Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
MAX6412-MAX6420
Typical Operating Characteristics (continued)
(VCC = 5V, CSRT = 1500pF, TA = +25C, unless otherwise noted.)
RESET TIMEOUT PERIOD vs. TEMPERATURE
CSRT = 1500pF
MAX6412-20 toc04
RESET TIMEOUT PERIOD vs. TEMPERATURE
CSRT = 0 550 RESET TIMEOUT PERIOD (s) 500 450 400 350 300 250
MAX6412-20 toc05
4.30
600
RESET TIMEOUT PERIOD (ms)
4.25
4.20
4.15
4.10
4.05 -50 -25 0 25 50 75 100 125 TEMPERATURE (C)
200 -50 -25 0 25 75 50 TEMPERATURE (C) 100 125
RESET IN THRESHOLD VOLTAGE vs. TEMPERATURE
MAX6412-20 toc06
MAXIMUM TRANSIENT DURATION vs. RESET THRESHOLD OVERDRIVE
MAX6412-20 toc07
1.280 RESET IN THRESHOLD VOLTAGE (V) 1.275 1.270 1.265 1.260 1.255 1.250 -50 -25 0 25 50 75 100
175 150 TRANSIENT DURATION (s) 125 100 75 50 25 VTH = 3.0V 0 RESET OCCURS ABOVE THE CURVE
125
0
200
400
600
800
1000
TEMPERATURE (C)
RESET THRESHOLD OVERDRIVE (mV)
4
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Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
Pin Description
PIN MAX6412/ MAX6413/ MAX6414 MAX6415/ MAX6416/ MAX6417 MAX6418/ MAX6419/ MAX6420 NAME FUNCTION
MAX6412-MAX6420
RESET 1 1 1 RESET
RESET changes from high to low whenever VCC or RESET IN drops below the selected reset threshold voltage (VTH or VRESET IN, respectively) or manual reset is pulled low. RESET remains low for the reset timeout period after all reset conditions are deasserted and then goes high. RESET changes from low to high whenever the VCC or RESET IN drops below the selected reset threshold voltage (VTH or VRESET IN) or manual reset is pulled low. RESET remains high for the reset timeout period after all reset conditions are deasserted and then goes low. Ground Reset Input. High-impedance input to the adjustable reset comparator. Connect RESET IN to the center point of an external resistor-divider network to set the threshold of the externally monitored voltage. See Reset Threshold section. Manual Reset Input. Pull this pin low to manually reset the device. Reset remains asserted for the reset timeout period after MR is released. Set Reset Timeout Input. Connect a capacitor between SRT and ground to set the timeout period. Determine the period as follows: tRP = (2.73 x 106) CSRT + 275s with tRP in seconds and CSRT in Farads. Supply Voltage and Input for Fixed-Threshold VCC Monitor
2
2
2
GND RESET IN
--
3
3
3
--
--
MR
4 5
4 5
4 5
SRT VCC
Detailed Description
The MAX6412-MAX6420 low-power microprocessor (P) supervisory circuits provide maximum adjustability for supply-voltage monitoring and reset functionality. In addition, the MAX6412-MAX6420 reset timeout period is adjustable using an external capacitor. The MAX6412/MAX6413/MAX6414 have factorytrimmed reset threshold voltages in approximately 100mV increments from 1.575V to 5.0V with a manual reset input. The MAX6415/MAX6416/MAX6417 contain a reset threshold that can be adjusted to any voltage above 1.26V using external resistors. The MAX6418/ MAX6419/MAX6420 offer both a factory-trimmed reset threshold and an adjustable reset threshold input for dual-voltage monitoring. A reset signal is asserted when VCC and/or RESET IN falls below the preset values or when MR is asserted. The reset remains asserted for an externally programmed interval after VCC and/or RESET IN has risen above the reset threshold or MR is deasserted.
in a known state. The MAX6412-MAX6420 P supervisory circuits provide the reset logic to prevent codeexecution errors during power-up, power-down, and brownout conditions (see Typical Operating Circuit). For the MAX6413, MAX6416, and MAX6419, RESET changes from low to high whenever VCC or RESET IN drops below the reset threshold voltages. Once RESET IN and VCC exceed their respective reset threshold voltage(s), RESET remains high for the reset timeout period, then goes low. On power-up, once VCC reaches 1V, RESET is guaranteed to be a logic high. For applications requiring valid reset logic when VCC is less than 1V, see the section Ensuring a Valid RESET/RESET Output Down to VCC = 0. The active-low RESET output of the remaining supervisors is the inverse of the MAX6413, MAX6416, and MAX6419 active-high RESET output and is guaranteed valid for VCC 1V.
Reset Threshold
The MAX6415-MAX6420 monitor the voltage on RESET IN with an external resistor voltage-divider (Figure 1).
Reset Output
The reset output is typically connected to the reset input of a P. A P's reset input starts or restarts the P
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Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
MAX6412-MAX6420
Use the following formula to calculate the externally monitored voltage (VMON_TH): VMON_TH = VRST (R1 + R2)/R2 where VMON_TH is the desired reset threshold voltage and VRST is the reset input threshold (1.26V). Resistors R1 and R2 can have very high values to minimize current consumption due to low leakage currents. Set R2 to some conveniently high value (1M, for example) and calculate R1 based on the desired monitored voltage, using the following formula: R1 = R2 x (VMON_TH/VRST - 1) ()
VCC
R1 RESET IN R2 GND VCC
MAX6415- MAX6420
Manual Reset Input (MAX6412/MAX6413/MAX6414)
Many P based products require manual reset capability, allowing the operator, a technician, or external logic circuitry to initiate a reset. A logic low on MR asserts reset. Reset remains asserted while MR is low and for the reset timeout period after MR returns high. The MR has an internal 20k pullup resistor so it can be left open if not used. Connect a normally open momentary switch from MR to ground to create a manual reset function (external debounce circuitry is not required for long reset timeout periods). A manual reset option can easily be implemented with the MAX6415-MAX6420 by connecting a normally open momentary switch in parallel with R2 (Figure 2). When the switch is closed, the voltage on RESET IN goes to zero, initiating a reset. Similar to the MAX6412/MAX6413/ MAX6414 manual reset, reset remains asserted while the switch is closed and for the reset timeout period after the switch is opened.
VMON_TH
SRT
Figure 2. Adding an External Manual Reset Function to the MAX6415-MAX6420
Monitoring Voltages Other than VCC (MAX6415/MAX6416/MAX6417)
The MAX6415/MAX6416/MAX6417 contain an adjustable reset threshold input. These devices can be used to monitor voltages other than VCC. Calculate VMON_TH as shown in the Reset Threshold section. (See Figure 3.)
VMON_TH
VCC
R1 RESET IN R2 GND VCC
R1 RESET IN R2 VCC
MAX6415 MAX6416 MAX6417
GND
MAX6415 MAX6416 MAX6417
SRT VMON_TH = 1.26 x (R1 + R2) / R2
SRT
Figure 1. Calculating the Monitored Threshold Voltage (VMON_TH) 6
Figure 3. Monitoring External Voltages
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Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
MAX6412-MAX6420
VMON_TH
VCC MAX6420 ONLY
VCC LASER-TRIMMED RESISTORS RL
RESET CIRCUITRY
1.26V R1
(RESET) RESET
P
R2
RESET IN
GND
SRT CSRT
MAX6418 MAX6419 MAX6420
Figure 4. MAX6418/MAX6419/MAX6420 Monitoring Two Voltages
Dual-Voltage Monitoring (MAX6418/MAX6419/MAX6420)
The MAX6418/MAX6419/MAX6420 contain both factory-trimmed threshold voltages and an adjustable reset threshold input, allowing the monitoring of two voltages, VCC and VMON_TH (see Figure 4). Reset is asserted when either of the voltages falls below its respective threshold voltage.
Application Information
Selecting a Reset Capacitor
The reset timeout period is adjustable to accommodate a variety of P applications. Adjust the reset timeout period (tRP) by connecting a capacitor (CSRT) between SRT and ground. Calculate the reset timeout capacitor as follows: CSRT = (tRP - 275s) / (2.73 106) where tRP is in seconds and CSRT is in Farads
The reset delay time is set by a current/capacitor-controlled ramp compared to an internal 0.65V reference. An internal 240nA ramp current source charges the external capacitor. The charge to the capacitor is cleared when a reset condition is detected. Once the reset condition is removed, the voltage on the capacitor ramps according to the formula: dV/dt = I/C. The CSRT capacitor must ramp to 0.65V to deassert the reset. CSRT must be a low-leakage (<10nA) type capacitor, ceramic is recommended.
Operating as a Voltage Detector
The MAX6412-MAX6420 can be operated in a voltage detector mode by floating the SRT pin. The reset delay times for VCC rising above or falling below the threshold are not significantly different. The reset output is deasserted smoothly without false pulses.
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Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
MAX6412-MAX6420
3.3V
5.0V
VCC 10k RESET 5V SYSTEM
MAX6414 MAX6417 MAX6420
GND
impedance CMOS-logic inputs connected to RESET can drift to undetermined voltages. This presents no problems in most applications, since most Ps and other circuitry do not operate with VCC below 1V. In those applications where RESET must be valid down to 0, adding a pulldown resistor between RESET and ground sinks any stray leakage currents, holding RESET low (Figure 6). The value of the pulldown resistor is not critical; 100k is large enough not to load RESET and small enough to pull RESET to ground. For applications using the MAX6413, MAX6416, and MAX6419, a 100k pullup resistor between RESET and VCC will hold RESET high when V CC falls below 1V (Figure 7). Open-drain RESET versions are not recommended for applications requiring valid logic for VCC down to 0.
Figure 5. MAX6414/MAX6417/MAX6420 Open-Drain RESET Output Allows use with Multiple Supplies
VCC
Interfacing to Other Voltages for Logic Compatibility
The open-drain outputs of the MAX6414/MAX6417/ MAX6420 can be used to interface to Ps with other logic levels. As shown in Figure 5, the open-drain output can be connected to voltages from 0 to 5.5V. This allows for easy logic compatibility to various microprocessors.
MAX6412 MAX6415 MAX6418
VCC
RESET GND 100k
Negative-Going VCC Transients In addition to issuing a reset to the P during power-up, power-down, and brownout conditions, these supervisors are relatively immune to short-duration negative-going transients (glitches). The Maximum Transient Duration vs. Reset Threshold Overdrive graph in the Typical Operating Characteristics shows this relationship. The area below the curve of the graph is the region in which these devices typically do not generate a reset pulse. This graph was generated using a negativegoing pulse applied to VCC, starting above the actual reset threshold (VTH) and ending below it by the magnitude indicated (reset-threshold overdrive). As the magnitude of the transient decreases (farther below the reset threshold), the maximum allowable pulse width decreases. Typically, a VCC transient that goes 100mV below the reset threshold and lasts 50s or less will not cause a reset pulse to be issued. Ensuring a Valid RESET or RESET Down to VCC = 0
Figure 6. Ensuring RESET Valid to VCC = 0
VCC 100k
MAX6413 MAX6416 MAX6419
VCC
RESET
GND
When VCC falls below 1V, RESET/RESET current sinking (sourcing) capabilities decline drastically. In the case of the MAX6412, MAX6415, and MAX6418, high8
Figure 7. Ensuring RESET Valid to VCC = 0
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Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
Layout Consideration
SRT is a precise current source. When developing the layout for the application, be careful to minimize board capacitance and leakage currents around this pin. Traces connected to SRT should be kept as short as possible. Traces carrying high-speed digital signals and traces with large voltage potentials should be routed as far from SRT as possible. Leakage current and stray capacitance (e.g., a scope probe) at this pin could cause errors in the reset timeout period. When evaluating these parts, use clean prototype boards to ensure accurate reset periods. RESET IN is a high-impedance input, which is typically driven by a high-impedance resistor-divider network (e.g., 1M to 10M). Minimize coupling to transient signals by keeping the connections to this input short. Any DC leakage current at RESET IN (e.g., a scope probe) causes errors in the programmed reset threshold.
MAX6412-MAX6420
Table 1. Reset Voltages Suffix Table
SUFFIX 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 MIN 1.536 1.623 1.755 1.853 1.950 2.048 2.133 2.313 2.340 2.438 2.559 2.633 2.730 2.852 2.925 2.998 3.120 3.218 3.315 3.413 3.510 3.608 3.705 3.803 3.900 3.998 4.095 4.193 4.266 4.388 4.509 4.583 4.680 4.778 4.875 TYP 1.575 1.665 1.800 1.900 2.000 2.100 2.188 2.313 2.400 2.500 2.625 2.700 2.800 2.925 3.000 3.075 3.200 3.300 3.400 3.500 3.600 3.700 3.800 3.900 4.000 4.100 4.200 4.300 4.375 4.500 4.625 4.700 4.800 4.900 5.000 MAX 1.614 1.707 1.845 1.948 2.050 2.153 2.243 2.371 2.460 2.563 2.691 2.768 2.870 2.998 3.075 3.152 3.280 3.383 3.485 3.558 3.690 3.793 3.895 3.998 4.100 4.203 4.305 4.408 4.484 4.613 4.741 4.818 4.920 5.023 5.125
Chip Information
TRANSISTOR COUNT: 325 PROCESS: BiCMOS
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Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
MAX6412-MAX6420
Standard Versions Table
PART* MAX6412UK16-T MAX6412UK22-T MAX6412UK26-T MAX6412UK29-T MAX6412UK46-T MAX6413UK16-T MAX6413UK22-T MAX6413UK26-T MAX6413UK29-T MAX6413UK46-T MAX6414UK16-T MAX6414UK22-T MAX6414UK26-T MAX6414UK29-T MAX6414UK46-T MAX6415UK-T MAX6416UK-T MAX6417UK-T MAX6418UK16-T MAX6418UK22-T MAX6418UK26-T MAX6418UK29-T MAX6418UK46-T MAX6419UK16-T MAX6419UK22-T MAX6419UK26-T MAX6419UK29-T MAX6419UK46-T MAX6420UK16-T MAX6420UK22-T MAX6420UK26-T MAX6420UK29-T MAX6420UK46-T TOP MARK ADVY ADWA ADWC ADWD ADWG ADWI ADWK ADWM ADWN ADWQ ADWS ADWU ADWW ADWX ADXA ADZO ADZP ADZQ ADYQ ADYI ADYK ADYL ADYO ADYQ ADYS ADYU ADYV ADYY ADZA ADZC ADZE ADZF ADZI
*Sample Stock is generally held on all standard versions. Contact factory for availability of nonstandard versions.
10
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Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
Selector Guide
PART MAX6412 MAX6413 MAX6414 MAX6415 MAX6416 MAX6417 MAX6418 MAX6419 MAX6420 FIXED VTH -- -- -- MANUAL RESET -- -- -- -- -- -- RESET IN -- -- -- PUSH-PULL RESET -- -- -- -- -- -- PUSH-PULL RESET -- -- -- -- -- -- OPEN-DRAIN RESET -- -- -- -- -- --
MAX6412-MAX6420
Typical Operating Circuit
VCC
VCC RESET/RESET RESET/RESET
MR
MAX6412 MAX6413 MAX6414
P
GND
SRT
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Low-Power, Single/Dual-Voltage P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
MAX6412-MAX6420
Package Information
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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