Maxim MAX6416 Low-power, single/dual-voltage up reset circuits with capacitor-adjustable reset timeout delay Datasheet

19-2336; Rev 1; 8/03
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Features
♦ Monitor System Voltages from 1.6V to 5V
♦ Capacitor-Adjustable Reset Timeout Period
♦ Manual Reset Input (MAX6412/MAX6413/MAX6414)
♦ Adjustable Reset Input Option
(MAX6415–MAX6420)
♦ Dual-Voltage Monitoring
(MAX6418/MAX6419/MAX6420)
♦ Low Quiescent Current (1.7µA, typ)
♦ 3 RESET Output Options
Push-Pull RESET
Push-Pull RESET
Open-Drain RESET
♦ Guaranteed Reset Valid to VCC = 1V
♦ Power-Supply Transient Immunity
♦ Small SOT23-5 Packages
Ordering Information
PART
TEMP RANGE
MAX6412UK_ _-T
-40°C to +125°C
5 SOT23-5
MAX6413UK_ _-T
-40°C to +125°C
5 SOT23-5
Automotive
MAX6414UK_ _-T
-40°C to +125°C
5 SOT23-5
Medical Equipment
MAX6415UK-T
-40°C to +125°C
5 SOT23-5
Intelligent Instruments
MAX6416UK-T
-40°C to +125°C
5 SOT23-5
Portable Equipment
MAX6417UK-T
-40°C to +125°C
5 SOT23-5
Battery-Powered Computers/Controllers
MAX6418UK_ _-T
-40°C to +125°C
5 SOT23-5
Embedded Controllers
MAX6419UK_ _-T
-40°C to +125°C
5 SOT23-5
Critical µP Monitoring
MAX6420UK_ _-T
-40°C to +125°C
5 SOT23-5
Applications
Set-Top Boxes
Computers
Pin Configuration
TOP VIEW
RESET/RESET
1
GND 2
5
VCC
4
SRT
MAX6412–
MAX6420
RESET IN (MR) 3
SOT23-5
PIN-PACKAGE
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.
( ) FOR THE MAX6412/MAX6413/MAX6414.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX6412–MAX6420
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 -40°C to +125°C.
MAX6412–MAX6420
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
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 = +70°C)
5-Pin SOT23-5 (derate 7.1mW/°C above +70°C) ........571mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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 = +25°C.) (Note 1)
PARAMETER
Supply Voltage Range
SYMBOL
CONDITIONS
VCC
MIN
VCC ≤ 5.0V
Supply Current
ICC
VTH
VCC to Reset Delay
Reset Timeout Period
VSRT Ramp Current
VSRT Ramp Threshold
tRP
IRAMP
VTH-RAMP
RAMP Threshold Hysteresis
RESET Output Voltage LOW
2
3.5
2.5
VTH +
1.5%
VTH +
2.5%
VTH +
3.5%
TA = 0°C to +125°C
VTH 1.5%
VTH 2.5%
VTH 3.5%
3 ✕ VTH
VCC falling at 1mV/µs
CSRT = 1500pF
3.35
CSRT = 0
4.375
RESET Output Leakage Current,
(Open-Drain)
VOH
ILKG
2
VOH
ms
VSRT = 0 to 0.65V; VCC = 1.6V to 5V
240
nA
VCC = 1.6V to 5V (VRAMP rising)
0.65
V
33
mV
VCC ≥ 1.0V, ISINK = 50µA
0.3
VCC ≥ 2.7V, ISINK = 1.2mA
0.3
V
0.4
VCC ≥ 1.8V, ISOURCE = 200µA
0.8 ✕ VCC
VCC ≥ 2.25V, ISOURCE = 500µA
0.8 ✕ VCC
VCC ≥ 4.5V, ISOURCE = 800µA
0.8 ✕ VCC
VCC > VTH, reset not asserted
VCC ≥ 1.0V, ISOURCE = 1µA
RESET Output Voltage HIGH
V
µs
5.40
0.275
VCC ≥ 4.5V, ISINK = 3.2mA
RESET Output Voltage HIGH,
(Push-Pull)
µA
mV
100
VRAMP falling threshold
VOL
V
4.5
1.7
VHYST
tRD
UNITS
5.5
VCC ≤ 2.0V
TA = -40°C to 0°C
Hysteresis
2.7
MAX
VCC ≤ 3.3V
TA = +25°C
VCC Reset Threshold Accuracy
TYP
1.0
V
1.0
µA
0.8 ✕ VCC
VCC ≥ 1.8V, ISOURCE = 150µA
0.8 ✕ VCC
VCC ≥ 2.7V, ISOURCE = 500µA
0.8 ✕ VCC
VCC ≥ 4.5V, ISOURCE = 800µA
0.8 ✕ VCC
_______________________________________________________________________________________
V
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
(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
RESET Output Voltage LOW
VOL
CONDITIONS
MIN
TYP
MAX
VCC ≥ 1.8V, ISINK = 500µA
0.3
VCC ≥ 2.7V, ISINK = 1.2mA
0.3
VCC ≥ 4.5V, ISINK = 3.2mA
0.4
RESET IN Leakage Current
UNITS
V
10
RESET IN Threshold
VRST
VRST falling, VCC = 1.6V to 5.0V
1.212
RESET IN Hysteresis
1.263
nA
1.313
V
25
VIL
0.8
VCC > 4.0V
VIH
MR Input
VIL
2.4
V
0.3 ✕ VCC
VCC < 4.0V
VIH
mV
0.7 ✕ VCC
MR Minimum Pulse Width
1
µs
MR Glitch Rejection
75
ns
MR to RESET Delay
50
µs
MR Pullup Resistance
Pull up to VCC
12
20
28
kΩ
Note 1: Devices production tested at +25°C. Over temperature limits are guaranteed by design.
Typical Operating Characteristics
(VCC = 5V, CSRT = 1500pF, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs.
TEMPERATURE
TA = +25°C
2
TA = -40°C
1
VCC = 5V
2.5
VCC = 3.3V
2.0
VCC = 1.8V
1.5
1.0
VCC = 1V
10,000
RESET TIMEOUT PERIOD (ms)
3
3.0
MAX6412-20 toc02
SUPPLY CURRENT (µA)
TA = +125°C
RESET TIMEOUT PERIOD vs. CSRT
3.5
SUPPLY CURRENT (µA)
MAX6412-20 toc01
4
MAX6412-20 toc03
SUPPLY CURRENT vs.
SUPPLY VOLTAGE
1000
100
10
1
0.5
0
0
0
1
2
3
4
SUPPLY VOLTAGE (V)
5
6
-50
-25
0
25
50
75
TEMPERATURE (°C)
100
125
0.1
0.001
0.01
0.1
1
10
100
1000
CSRT (nF)
_______________________________________________________________________________________
3
MAX6412–MAX6420
ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics (continued)
(VCC = 5V, CSRT = 1500pF, TA = +25°C, unless otherwise noted.)
RESET TIMEOUT PERIOD
vs. TEMPERATURE
4.25
4.20
4.15
4.10
600
CSRT = 0
550
RESET TIMEOUT PERIOD (µs)
CSRT = 1500pF
500
MAX6412-20 toc05
RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX6412-20 toc04
RESET TIMEOUT PERIOD (ms)
4.30
450
400
350
300
250
200
4.05
-50
-25
0
25
50
75
100
-50
125
-25
TEMPERATURE (°C)
RESET IN THRESHOLD VOLTAGE
vs. TEMPERATURE
25
75
50
TEMPERATURE (°C)
100
1.270
1.265
1.260
125
MAX6412-20 toc07
175
150
TRANSIENT DURATION (µs)
1.275
0
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
MAX6412-20 toc06
1.280
RESET IN THRESHOLD VOLTAGE (V)
MAX6412–MAX6420
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
125
100
RESET OCCURS
ABOVE THE CURVE
75
50
1.255
25
1.250
0
VTH = 3.0V
-50
-25
0
25
50
75
TEMPERATURE (°C)
4
100
125
0
200
400
600
800
RESET THRESHOLD OVERDRIVE (mV)
_______________________________________________________________________________________
1000
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
PIN
MAX6412/
MAX6413/
MAX6414
1
2
MAX6415/
MAX6416/
MAX6417
1
2
MAX6418/
MAX6419/
MAX6420
NAME
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
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.
1
2
FUNCTION
GND
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.
—
3
3
RESET
IN
3
—
—
MR
Manual Reset Input. Pull this pin low to manually reset the device. Reset
remains asserted for the reset timeout period after MR is released.
4
4
4
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 x 106) ✕ CSRT + 275µs with tRP in seconds and CSRT in Farads.
5
5
5
VCC
Supply Voltage and Input for Fixed-Threshold VCC Monitor
Detailed Description
The MAX6412–MAX6420 low-power microprocessor
(µP) 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.
Reset Output
in a known state. The MAX6412–MAX6420 µP 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).
The reset output is typically connected to the reset
input of a µP. A µP’s reset input starts or restarts the µP
_______________________________________________________________________________________
5
MAX6412–MAX6420
Pin Description
MAX6412–MAX6420
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
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 (1MΩ, for example)
and calculate R1 based on the desired monitored voltage, using the following formula:
R1 = R2 x (VMON_TH/VRST - 1) (Ω)
VCC
R1
RESET IN
VCC
R2
GND
MAX6415–
MAX6420
Manual Reset Input
(MAX6412/MAX6413/MAX6414)
Many µP 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 20kΩ 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
R1
RESET IN
RESET IN
VCC
VCC
R2
R2
GND
MAX6415
MAX6416
MAX6417
GND
MAX6415
MAX6416
MAX6417
SRT
SRT
VMON_TH = 1.26 x (R1 + R2) / R2
Figure 1. Calculating the Monitored Threshold Voltage (VMON_TH)
6
Figure 3. Monitoring External Voltages
_______________________________________________________________________________________
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
MAX6412–MAX6420
VMON_TH
VCC
MAX6420
ONLY
VCC
LASER-TRIMMED
RESISTORS
RL
RESET
CIRCUITRY
1.26V
(RESET)
RESET
µP
R1
R2
RESET IN
GND
SRT
MAX6418
MAX6419
MAX6420
CSRT
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 µP 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 - 275µs) / (2.73 ✕ 106)
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.
where tRP is in seconds and CSRT is in Farads
_______________________________________________________________________________________
7
MAX6412–MAX6420
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
5.0V
3.3V
VCC
10kΩ
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 µPs 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; 100kΩ is large enough not to load
RESET and small enough to pull RESET to ground. For
applications using the MAX6413, MAX6416, and
MAX6419, a 100kΩ pullup resistor between RESET and
VCC will hold RESET high when VCC 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
Interfacing to Other Voltages for Logic
Compatibility
The open-drain outputs of the MAX6414/MAX6417/
MAX6420 can be used to interface to µPs 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.
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-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 50µs or less will 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 MAX6412, MAX6415, and MAX6418, high8
VCC
MAX6412
MAX6415
MAX6418
VCC
RESET
100kΩ
GND
Figure 6. Ensuring RESET Valid to VCC = 0
VCC
100kΩ
MAX6413
MAX6416
MAX6419
VCC
RESET
GND
Figure 7. Ensuring RESET Valid to VCC = 0
_______________________________________________________________________________________
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Chip Information
TRANSISTOR COUNT: 325
PROCESS: BiCMOS
MAX6412–MAX6420
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., 1MΩ to 10MΩ). 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.
Table 1. Reset Voltages Suffix Table
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
2.313
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
_______________________________________________________________________________________
9
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
MAX6412–MAX6420
Standard Versions Table
PART*
TOP MARK
MAX6412UK16-T
ADVY
MAX6412UK22-T
ADWA
MAX6412UK26-T
ADWC
MAX6412UK29-T
ADWD
MAX6412UK46-T
ADWG
MAX6413UK16-T
ADWI
MAX6413UK22-T
ADWK
MAX6413UK26-T
ADWM
MAX6413UK29-T
ADWN
MAX6413UK46-T
ADWQ
MAX6414UK16-T
ADWS
MAX6414UK22-T
ADWU
MAX6414UK26-T
ADWW
MAX6414UK29-T
ADWX
MAX6414UK46-T
ADXA
MAX6415UK-T
ADZO
MAX6416UK-T
ADZP
MAX6417UK-T
ADZQ
MAX6418UK16-T
ADYG
MAX6418UK22-T
ADYI
MAX6418UK26-T
ADYK
MAX6418UK29-T
ADYL
MAX6418UK46-T
ADYO
MAX6419UK16-T
ADYQ
MAX6419UK22-T
ADYS
MAX6419UK26-T
ADYU
MAX6419UK29-T
ADYV
MAX6419UK46-T
ADYY
MAX6420UK16-T
ADZA
MAX6420UK22-T
ADZC
MAX6420UK26-T
ADZE
MAX6420UK29-T
ADZF
MAX6420UK46-T
ADZI
*Sample Stock is generally held on all standard versions.
Contact factory for availability of nonstandard versions.
10
______________________________________________________________________________________
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
PART
FIXED
VTH
MANUAL
RESET
RESET IN
MAX6412
✔
✔
MAX6413
✔
✔
PUSH-PULL
RESET
PUSH-PULL
RESET
OPEN-DRAIN
RESET
—
✔
—
—
—
—
✔
—
MAX6414
✔
✔
—
—
—
✔
MAX6415
—
—
✔
✔
—
—
MAX6416
—
—
✔
—
✔
—
MAX6417
—
—
✔
—
—
✔
MAX6418
✔
—
✔
✔
—
—
MAX6419
✔
—
✔
—
✔
—
MAX6420
✔
—
✔
—
—
✔
Typical Operating Circuit
VCC
VCC
RESET/RESET
MR
GND
RESET/RESET
µP
MAX6412
MAX6413
MAX6414
SRT
______________________________________________________________________________________
11
MAX6412–MAX6420
Selector Guide
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
SOT-23 5L .EPS
MAX6412–MAX6420
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
PACKAGE OUTLINE, SOT-23, 5L
21-0057
E
1
1
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
© 2003 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.