MAX6340, MAX6421-26 Datasheet by Maxim Integrated

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MAX6340/MAX6421— Low-Power, SC70ISOT pP Reset Circuits V maxim integrated.
General Description
The MAX6340/MAX6421–MAX6426 low-power micropro-
cessor supervisor circuits monitor system voltages from
1.6V to 5V. These devices perform a single function: they
assert a reset signal whenever the VCC supply voltage
falls below its reset threshold. The reset output remains
asserted for the reset timeout period after VCC rises
above the reset threshold. The reset timeout is externally
set by a capacitor to provide more flexibility.
The MAX6421/MAX6424 have an active-low, push-
pull reset output. The MAX6422 has an active-high, push-
pull reset output and the MAX6340/MAX6423/ MAX6425/
MAX6426 have an active-low, open-drain reset output.
The MAX6421/MAX6422/MAX6423 are offered in 4-pin
SC70 or SOT143 packages. The MAX6340/MAX6424/
MAX6425/MAX6426 are available in 5-pin SOT23-5
packages.
Applications
Portable Equipment
Battery-Powered Computers/Controllers
Automotive
Medical Equipment
Intelligent Instruments
Embedded Controllers
Critical µP Monitoring
Set-Top Boxes
Computers
Benefits and Features
Monitor System Voltages from 1.6V to 5V
Capacitor-Adjustable Reset Timeout Period
Low Quiescent Current (1.6µA typ)
Three RESET Output Options
Push-Pull RESET
Push-Pull RESET
Open-Drain RESET
Guaranteed Reset Valid to VCC = 1V
Immune to Short VCC Transients
Small 4-Pin SC70, 4-Pin SOT143, and 5-Pin SOT23
Packages
MAX6340 Pin Compatible with LP3470
MAX6424/MAX6425 Pin Compatible with
NCP300–NCP303, MC33464/MC33465,
S807/S808/S809, and RN5VD
MAX6426 Pin Compatible with PST92XX
AEC-Q100 Qualified (MAX6340UK31/V+T)
19-2440; Rev 10; 5/18
Typical Operating Circuit, Selector Guide, and Ordering
Information appear at end of data sheet.
Pin Configurations continued at end of data sheet.
GND
( ) ARE FOR THE MAX6422
VCC 1 4
SRT
MAX6421X
MAX6422X
MAX6423X
SC70
TOP VIEW
23
RESET
(RESET)
MAX6340/MAX6421–
MAX6426
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Pin Configurations
Click here for production status of specific part numbers.
All Voltages Referenced to GND
VCC .......................................................................-0.3V to +6.0V
SRT, 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 = +70°C)
4-Pin SC70 (derate 3.1mW/°C above +70°C) .............245mW
4-Pin SOT143 (derate 4mW/°C above +70°C) ...........320mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C) ..........571mW
Operating Temperature Range ......................... -40°C to +125°C
Storage Temperature Range ........................... .-65°C to +150°C
Junction Temperature ...................................................... +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: Devices production tested at +25°C. Overtemperature limits are guaranteed by design.
(VCC = 1V to 5.5V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at VCC = 5V and TA = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range VCC 1.0 5.5 V
Supply Current ICC
VCC ≤ 5.0V 2.5 4.2
µA
VCC ≤ 3.3V 1.9 3.4
VCC ≤ 2.0V 1.6 2.5
VCC Reset Threshold Accuracy VTH
TA = +25°C VTH - 1.5% VTH + 1.5% V
TA = -40°C to +125°C VTH - 2.5% VTH + 2.5%
Hysteresis VHYST 4 x VTH mV
VCC to Reset Delay tRD VCC falling at 1mV/µs 80 µs
Reset Timeout Period tRP
CSRT = 1500pF 3.00 4.375 5.75 ms
CSRT = 0 0.275
VSRT Ramp Current IRAMP VSRT = 0 to 0.65V; VCC = 1.6V to 5V 240 nA
VSRT Ramp Threshold VTH-RAMP VCC = 1.6V to 5V (VRAMP rising) 0.65 V
RAMP Threshold Hysteresis VRAMP falling threshold 33 mV
RESET Output Voltage Low VOL
VCC ≥ 1.0V, ISINK = 50µA 0.3
VVCC ≥ 2.7V, ISINK = 1.2mA 0.3
VCC ≥ 4.5V, ISINK = 3.2mA 0.4
RESET Output Voltage High,
Push-Pull VOH
VCC ≥ 1.8V, ISOURCE = 200µA 0.8 x VCC
VVCC ≥ 2.25V, ISOURCE = 500µA 0.8 x VCC
VCC ≥ 4.5V, ISOURCE = 800µA 0.8 x VCC
RESET Output Leakage Current,
Open-Drain ILKG VCC > VTH, reset not asserted 1.0 µA
RESET Output Voltage High VOH
VCC ≥ 1.0V, ISOURCE = 1µA 0.8 x VCC
V
VCC ≥ 1.8V, ISOURCE = 150µA 0.8 x VCC
VCC ≥ 2.7V, ISOURCE = 500µA 0.8 x VCC
VCC ≥ 4.5V, ISOURCE = 800µA 0.8 x VCC
RESET Output Voltage Low VOL
VCC ≥ 1.8V, ISINK = 500µA 0.3
VVCC ≥ 2.7V, ISINK = 1.2mA 0.3
VCC ≥ 4.5V, ISINK = 3.2mA 0.4
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MAX6340/MAX6421–
MAX6426
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Electrical Characteristics
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.
Absolute Maximum Ratings
(VCC = 5V, CSRT = 1500pF, TA = +25°C, unless otherwise noted.)
0.994
0.998
0.996
1.002
1.000
1.004
1.006
-50 25 50-25 0 75 100 125
NORMALIZED RESET THRESHOLD
vs. TEMPERATURE
MAX6421/26 toc08
TEMPERATURE (°C)
NORMALIZED RESET THRESHOLD
POWER-UP/POWER-DOWN
CHARACTERISTIC
MAX6421/26 toc07
1V/div
1V/div
VCC
RESET
VTH = 1.6V
400s/div
VCC TO RESET DELAY
vs. TEMPERATURE (VCC FALLING)
MAX6421/26 toc06
80
90
110
100
140
150
130
120
160
VCC TO RESET DELAY Sµs)
-50 0 25-25 50 75 100 125
TEMPERATURE (°C)
VCC FALLING AT 1mVs
0
50
25
100
75
150
125
175
0 400200 600 800 1000
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
MAX6421/26 toc05
RESET THRESHOLD OVERDRIVE (mV)
TRANSIENT DURATION (s)
RESET OCCURS
ABOVE THE CURVE
VTH = 2.95V
RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX6421/26 toc04
200
250
350
300
500
550
450
400
600
RESET TIMEOUT PERIOD (
µs)
-50 0 25-25 50 75 100 125
TEMPERATURE (°C)
CSRT = 0
4.10
4.20
4.15
4.25
4.30
-50 0-25 25 50 75 100 125
RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX6421/26 toc03
TEMPERATURE (°C)
RESET TIMEOUT PERIOD (ms)
CSRT = 1500pF
0.1
1
100
10
1000
10,000
0.001 0.10.01 1 10 100 1000
RESET TIMEOUT PERIOD vs. CSRT
MAX6421/26 toc02
CSRT (nF)
RESET TIMEOUT PERIOD (ms)
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0 21 3 4 5 6
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6421/26 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
TA = +25°C
TA = +125°C
TA = -40°C
Maxim Integrated
3
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MAX6340/MAX6421–
MAX6426
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Typical Operating Characteristics
Detailed Description
Reset Output
The reset output is typically connected to the reset input of
a µP. A µP’s reset input starts or restarts the µP in a known
state. The MAX6340/MAX6421–MAX6426 µP superviso-
ry circuits provide the reset logic to prevent code-execu-
tion errors during power-up, power-down, and brownout
conditions (see Typical Operating Characteristics).
RESET changes from high to low whenever VCC drops
below the threshold voltage. Once VCC exceeds the
threshold voltage, RESET remains low for the capaci-
tor-adjustable reset timeout period.
The MAX6422 active-high RESET output is the inverse
logic of the active-low RESET output. All device outputs
are guaranteed valid for VCC > 1V.
The MAX6340/MAX6423/MAX6425/MAX6426 are open-
drain RESET outputs. Connect an external pullup resistor
to any supply from 0 to 5.5V. Select a resistor value large
enough to register a logic low when RESET is asserted
and small enough to register a logic high while supply-
ing all input current and leakage paths connected to the
RESET line. A 10k to 100k pullup is sufficient in most
applications.
Selecting a Reset Capacitor
The reset timeout period is adjustable to accommodate
a variety of µP applications. Adjust the reset timeout
period (tRP) by connecting a capacitor (CSRT) between
SRT and ground. Calculate the reset timeout capacitor
as follows:
Figure 1. MAX6340/MAX6423/MAX6425/MAX6426 Open-Drain
RESET Output Allows Use with Multiple Supplies
PIN
NAME FUNCTIONMAX6340
MAX6421
MAX6422
MAX6423
MAX6424
MAX6425 MAX6426
SOT23 SOT143 SC70 SOT23 SOT23
1 3 3 5 1 SRT
Set Reset Timeout Input. Connect a capacitor between
SRT and ground to set the timeout period. Determine the
period as follows: tRP = 2.73 × 106 × CSRT + 275µs with
tRP in seconds and CSRT in farads
2 1 2 3 2, 3 GND Ground
3 4 N.C. Not Internally Connected. Can be connected to GND
4 2 1 2 5 VCC Supply Voltage and Reset Threshold Monitor Input
5
4 4
1 4 RESET
RESET changes from high to low whenever VCC drops
below the selected reset threshold voltage. RESET
remains low for the reset timeout period after VCC exceeds
the reset threshold
— RESET
RESET changes from low to high whenever VCC drops
below the selected reset threshold voltage. RESET
remains high for the reset timeout period after VCC
exceeds the reset threshold
MAX6340
MAX6423
MAX6425
MAX6426
VREF
CSRT
SRT RESET
TIMEOUT
N
GND
RESET
LASER-TRIMMED
RESISTORS
VCC
3.3V
10k
5.0V
5V
SYSTEM
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MAX6340/MAX6421–
MAX6426
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Pin Description
CSRT = (tRP - 275µs) / (2.73 5 106)
where tRP is in seconds and CSRT is in farads.
The reset delay time is set by a current/capacitor-con-
trolled 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 MAX6340/MAX6421–MAX6426 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.
Applications Information
Interfacing to Other Voltages for Logic
Compatibility
The open-drain outputs of the MAX6340/MAX6423/
MAX6425/MAX6426 can be used to interface to µPs with
other logic levels. As shown in Figure 1, the open-drain
output can be connected to voltages from 0 to 5.5V. This
allows for easy logic compatibility to various µPs.
Wired-OR Reset
To allow auxiliary circuitry to hold the system in reset,
an external open-drain logic signal can be connected
to the open-drain RESET of the MAX6340/MAX6423/
MAX6425/MAX6426, as shown in Figure 2. This config-
uration can reset the µP, but does not provide the reset
timeout when the external logic signal is released.
Negative-Going VCC Transients
In addition to issuing a reset to the µP during power-up,
power-down, and brownout conditions, these supervisors
are relatively immune to short-duration negative-go-
ing transients (glitches). The graph Maximum Transient
Duration vs. Reset Threshold Overdrive 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 negative-going
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 thresh-
old), the maximum allowable pulse width decreases.
Typically, a VCC transient that goes 100mV below the
reset threshold and lasts 50µs or less does not cause a
reset pulse to be issued.
Ensuring a Valid RESET or RESET
Down to VCC = 0
When VCC falls below 1V, RESET/RESET current-sinking
(sourcing) capabilities decline drastically. In the case of
the MAX6421/MAX6424, high-impedance CMOS-logic
inputs connected to RESET can drift to undetermined
voltages. This presents no problems in most applications,
since most µPs and other circuitry do not operate with
VCC below 1V.
In those applications where RESET must be valid down
to zero, adding a pulldown resistor between RESET
and ground sinks any stray leakage currents, holding
RESET low (Figure 3). The value of the pulldown resis-
tor is not critical; 100kΩ is large enough not to load
RESET and small enough to pull RESET to ground. For
applications using the MAX6422, a 100kΩ pullup resis-
Figure 2. Wired-OR Reset Circuit
VDD
VCC
MAX6340
MAX6423
MAX6425
MAX6426
RESET
N
N
GND
OPEN-DRAIN
LOGIC
µP
RESET
10k
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MAX6340/MAX6421–
MAX6426
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
tor between RESET and VCC holds RESET high when
VCC falls below 1V (Figure 4). Open-drain RESET ver-
sions are not recommended for applications requiring
valid logic for VCC down to zero.
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.
Table 1. Reset Threshold Voltage Suffix
Figure 4. Ensuring RESET Valid to VCC = 0
Figure 3. Ensuring RESET Valid to VCC = 0
SUFFIX MIN TYP MAX
16 1.536 1.575 1.614
17 1.623 1.665 1.707
18 1.755 1.800 1.845
19 1.853 1.900 1.948
20 1.950 2.000 2.050
21 2.048 2.100 2.153
22 2.133 2.188 2.243
23 2.255 2.313 2.371
24 2.340 2.400 2.460
25 2.438 2.500 2.563
26 2.559 2.625 2.691
27 2.633 2.700 2.768
28 2.730 2.800 2.870
29 2.852 2.925 2.998
30 2.925 3.000 3.075
31 2.998 3.075 3.152
32 3.120 3.200 3.280
33 3.218 3.300 3.383
34 3.315 3.400 3.485
35 3.413 3.500 3.558
36 3.510 3.600 3.690
37 3.608 3.700 3.793
38 3.705 3.800 3.895
39 3.803 3.900 3.998
40 3.900 4.000 4.100
41 3.998 4.100 4.203
42 4.095 4.200 4.305
43 4.193 4.300 4.408
44 4.266 4.375 4.484
45 4.388 4.500 4.613
46 4.509 4.625 4.741
47 4.583 4.700 4.818
48 4.680 4.800 4.920
49 4.778 4.900 5.023
50 4.875 5.000 5.125
MAX6422
GND
VCC
VCC
RESET
100k
MAX6421
MAX6424
GND
VCC
VCC
RESET
100k
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MAX6340/MAX6421–
MAX6426
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
‘Sample Stock rs generally held on all Slandald versions. Comacl
*Sample stock is generally held on all standard versions. Contact
factory for availability of nonstandard versions.
Standard Versions Table
PART* OUTPUT STAGE
MAX6423US16+T Open-Drain RESET
MAX6423XS16+T Open-Drain RESET
MAX6423US22+T Open-Drain RESET
MAX6423XS22+T Open-Drain RESET
MAX6423US26+T Open-Drain RESET
MAX6423XS26+T Open-Drain RESET
MAX6423US29+T Open-Drain RESET
MAX6423XS29+T Open-Drain RESET
MAX6423US46+T Open-Drain RESET
MAX6423XS46+T Open-Drain RESET
MAX6424UK16+T Push-Pull RESET
MAX6424UK22+T Push-Pull RESET
MAX6424UK26+T Push-Pull RESET
MAX6424UK29+T Push-Pull RESET
MAX6424UK46+T Push-Pull RESET
MAX6425UK16+T Open-Drain RESET
MAX6425UK22+T Open-Drain RESET
MAX6425UK26+T Open-Drain RESET
MAX6425UK29+T Open-Drain RESET
MAX6425UK46+T Open-Drain RESET
MAX6426UK16+T Open-Drain RESET
MAX6426UK22+T Open-Drain RESET
MAX6426UK26+T Open-Drain RESET
MAX6426UK29+T Open-Drain RESET
MAX6426UK46+T Open-Drain RESET
PART* OUTPUT STAGE
MAX6340UK16+T Open-Drain RESET
MAX6340UK22+T Open-Drain RESET
MAX6340UK26+T Open-Drain RESET
MAX6340UK29+T Open-Drain RESET
MAX6340UK46+T Open-Drain RESET
MAX6421US16+T Push-Pull RESET
MAX6421XS16+T Push-Pull RESET
MAX6421US22+T Push-Pull RESET
MAX6421XS22+T Push-Pull RESET
MAX6421US26+T Push-Pull RESET
MAX6421XS26+T Push-Pull RESET
MAX6421US29+T Push-Pull RESET
MAX6421XS29+T Push-Pull RESET
MAX6421US46+T Push-Pull RESET
MAX6421XS46+T Push-Pull RESET
MAX6422US16+T Push-Pull RESET
MAX6422XS16+T Push-Pull RESET
MAX6422US22+T Push-Pull RESET
MAX6422XS22+T Push-Pull RESET
MAX6422US26+T Push-Pull RESET
MAX6422XS26+T Push-Pull RESET
MAX6422US29+T Push-Pull RESET
MAX6422XS29+T Push-Pull RESET
MAX6422US46+T Push-Pull RESET
MAX6422XS46+T Push-Pull RESET
MAX6421
MAX6424
VREF
CSRT
SRT RESET
TIMEOUT
GND
RESET
LASER-TRIMMED
RESISTORS
VCC
VCC
P
RESET
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MAX6340/MAX6421–
MAX6426
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Typical Operating Circuit
:’ j C' j E E E j E j C' j E' j E j E E j
PART PUSH-PULL RESET PUSH-PULL RESET OPEN-DRAIN RESET PIN-PACKAGE
MAX6340 — 5 SOT23
MAX6421 4 SOT143/SC70
MAX6422 — 4 SOT143/SC70
MAX6423 — 4 SOT143/SC70
MAX6424 5 SOT23
MAX6425 — 5 SOT23
MAX6426 — 5 SOT23
VCC
N.C.
1 5 SRT
MAX6424
MAX6425
SOT23
TOP VIEW
2
3 4
RESET
GND
GND
1 5 VCC
MAX6426
SOT23
2
3 4
SRT
GND RESET
VCC
N.C.
1 5SRT
MAX6340
SOT23
2
3 4
RESET
GND
GND
VCC
1 4
SRT
MAX6421U
MAX6422U
MAX6423U
SOT143
23
RESET
(RESET)
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MAX6340/MAX6421–
MAX6426
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Selector Guide
Pin Configurations (continued)
Note: The MAX6340/MAX6421MAX6426 are available with factory-trimmed
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. There are 50 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.
Devices are available in both leaded and lead-free packaging.
“+” Denotes Lead(Pb)-free packages and “-” denotes leaded packages.
For top mark information, please go to https://www.maximinte-
grated.com/en/design/packaging/topmark/
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
4 SC70 X4+1 21-0098 90-0187
4 SOT143 U4+1 21-0052 90-0183
5 SOT23 U5+2 21-0057 90-0174
PART TEMP RANGE PIN-PACKAGE
MAX6340UK_ _+T -40°C to +125°C 5 SOT23-5
MAX6340UK_ _/V+T -40°C to +125°C 5 SOT23-5
MAX6340UK31/V+T -40°C to +125°C 5 SOT23-5
MAX6421XS_ _+T -40°C to +125°C 4 SC70-4
MAX6421US_ _+T -40°C to +125°C 4 SOT143-4
MAX6421US_ _-T -40°C to +125°C 4 SOT143-4
MAX6422XS_ _+T -40°C to +125°C 4 SC70-4
MAX6422US_ _+T -40°C to +125°C 4 SOT143-4
MAX6422US_ _-T -40°C to +125°C 4 SOT143-4
MAX6423XS_ _+T -40°C to +125°C 4 SC70-4
MAX6423US_ _+T -40°C to +125°C 4 SOT143-4
MAX6423US_ _-T -40°C to +125°C 4 SOT143-4
MAX6424UK_ _+T -40°C to +125°C 5 SOT23-5
MAX6424UK_ _-T -40°C to +125°C 5 SOT23-5
MAX6425UK_ _+T -40°C to +125°C 5 SOT23-5
MAX6425UK_ _-T -40°C to +125°C 5 SOT23-5
MAX6426UK_ _+T -40°C to +125°C 5 SOT23-5
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MAX6340/MAX6421–
MAX6426
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Chip Information
TRANSISTOR COUNT: 295
PROCESS: BiCMOS
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages. Note
that a “+”, “#”, or “-” in the package code indicates RoHS status
only. Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
Ordering Information
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
5 3/14 Added /V OPN to Ordering Information 1
6 12/15 Added lead-free part numbers to Ordering Information table and removed top
mark information from Standard Versions table 1, 8
7 1/16 Changed MAX6340UK_ _/V-T to MAX6340UK_ _/V+T in Ordering
Information table 9
8 9/16 Updated Table 1 6
9 3/18 Updated Ordering Information table 9
10 5/18 Updated Benefits and Features section 1
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2018 Maxim Integrated Products, Inc.
10
MAX6340/MAX6421–
MAX6426
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Revision History
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

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IC SUPERVISOR 1 CHANNEL SOT23-5
IC SUPERVISOR 1 CHANNEL SC70-4
IC SUPERVISOR 1 CHANNEL SC70-4
IC SUPERVISOR 1 CHANNEL SOT23-5
IC SUPERVISOR 1 CHANNEL SOT23-5
IC SUPERVISOR 1 CHANNEL SOT23-5
IC SUPERVISOR 1 CHANNEL SOT23-5
IC SUPERVISOR 1 CHANNEL SOT23-4
IC SUPERVISOR 1 CHANNEL SC70-4
IC SUPERVISOR 1 CHANNEL SOT23-5
IC SUPERVISOR 1 CHANNEL SOT23-5
IC SUPERVISOR 1 CHANNEL SOT23-5
IC SUPERVISOR 1 CHANNEL SC70-4
IC SUPERVISOR 1 CHANNEL SOT23-5
IC SUPERVISOR 1 CHANNEL SC70-4
IC SUPERVISOR 1 CHANNEL SC70-4
IC SUPERVISOR 1 CHANNEL SOT23-5
IC SUPERVISOR 1 CHANNEL SOT143-4
IC SUPERVISOR 1 CHANNEL SOT143-4