MAXIM MAX16052_10

19-4144; Rev 2; 1/10
High-Voltage, Adjustable
Sequencing/Supervisory Circuits
The MAX16052/MAX16053 are a family of small, lowpower, high-voltage monitoring circuits with sequencing capability. These miniature devices offer very wide
flexibility with an adjustable voltage threshold and an
external capacitor-adjustable time delay. These
devices are ideal for use in power-supply sequencing,
reset sequencing, and power switching applications.
Multiple devices can be cascaded for complex
sequencing applications.
A high-impedance input (IN) with a 0.5V threshold
allows an external resistive divider to set the monitored
threshold. The output (OUT) asserts high when the
input voltage rises above the 0.5V threshold and the
enable input (EN) is asserted high. When the voltage at
IN falls below 0.495V or when the enable input is
deasserted (EN = low), the output deasserts (OUT =
low). The MAX16052/MAX16053 provide a capacitor
programmable delay time from when the voltage at IN
rises above 0.5V to when the output is asserted.
The MAX16052 offers an active-high open-drain output
while the MAX16053 offers an active-high push-pull output. Both devices operate from a 2.25V to 28V supply
voltage and feature an active-high enable input. The
MAX16052/MAX16053 are available in a tiny 6-pin
SOT23 package and are fully specified over the automotive temperature range (-40°C to +125°C).
Features
o 1.8% Accurate Adjustable Threshold Over
Temperature
o Open-Drain (28V Tolerant) Output Allows
Interfacing to 12V Intermediate Bus Voltage
o Operates from VCC of 2.25V to 28V
o Low Supply Current (18µA typ)
o Capacitor-Adjustable Delay
o Active-High Logic-Enable Input
o Fully Specified from -40°C to +125°C
o Small 6-Pin SOT23 Package
Ordering Information
Computers/Servers
Medical Equipment
Critical µP Monitoring
Intelligent Instruments
Set-Top Boxes
Portable Equipment
Telecom
TOP
MARK
Open-Drain
6 SOT23
+ACLW
Push-Pull
6 SOT23
+ACLX
OUTPUT
MAX16052AUT+T
MAX16053AUT+T
Note: All devices operate over the -40°C to +125°C operating
automotive temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel, offered in 2.5k increments.
Pin Configuration
TOP VIEW
Applications
Automotive
PINPACKAGE
PART
1
EN
CDELAY 6
2
GND MAX16053
VCC 5
3
IN
OUT 4
MAX16052
SOT23
Typical Operating Circuit
DC-DC
CONVERTER
12V
VCC
EN
VCC
EN
IN
IN
MAX16052
OUT
CDELAY
GND
EN
OUT
0.9V
IN
MAX16052
DC-DC
CONVERTER
OUT
CDELAY
GND
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
MAX16052/MAX16053
General Description
MAX16052/MAX16053
High-Voltage, Adjustable
Sequencing/Supervisory Circuits
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
VCC .........................................................................-0.3V to +30V
OUT (push-pull, MAX16053) ......................-0.3V to (VCC + 0.3V)
OUT (open-drain, MAX16052)................................-0.3V to +30V
EN, IN .........................................................-0.3V to (VCC + 0.3V)
CDELAY....................................................................-0.3V to +6V
Input/Output Current (all pins)..........................................±20mA
Continuous Power Dissipation (TA = +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C)..........695.7mW
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
Soldering Temperature (reflow) .......................................+260°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 = 2.25V to 28V, VEN = VCC, TA = TJ = -40°C to +125°C, unless otherwise specified. Typical values are at VCC = 3.3V and TA =
+25°C.) (Note 1)
PARAMETER
SUPPLY
Operating Voltage Range
Undervoltage Lockout
SYMBOL
VCC
UVLO
CONDITIONS
VCC Supply Current
ICC
MAX16053, no load
IN
Threshold Voltage
Hysteresis
Input Current
CDELAY
CDELAY Charge Current
CDELAY Threshold
CDELAY Pulldown Resistance
VTH
VHYST
TYP
MAX
UNITS
V
V
VCC = 3.3V
18
28
2
37
VCC = 12V
23
45
VCC = 28V
VCC = 3.3V
38
22
61
47
VCC = 12V
29
57
VCC = 28V
44
71
0.500
0.509
2.25
1.8
VCC falling (Note 2)
MAX16052, no load
MIN
VIN rising, 2.25V ≤ VCC ≤ 28V
0.491
VIN falling
5
IIN
VIN = 0 or 28V
ICD
VCDELAY = 0V
200
VTCD
VCDELAY rising
0.95
RCDELAY
-110
+25
µA
V
mV
+110
nA
250
300
nA
1.00
1.05
V
VCC ≥ 2.25V, ISINK = 200µA
15
60
VCC ≥ 3.3V, ISINK = 1mA
15
60
Ω
EN
EN Low Voltage
VIL
EN High Voltage
VIH
EN Leakage Current
OUT
ILEAK
OUT Low Voltage
(Open-Drain or Push-Pull)
VOL
OUT High Voltage
(Push-Pull, MAX16053)
VOH
OUT Leakage Current
(Open-Drain, MAX16052)
ILKG
2
0.5
1.4
VEN = 0 or 28V
-110
V
V
+20
+110
VCC ≥ 1.2V, ISINK = 90µA
0.2
VCC ≥ 2.25V, ISINK = 0.5mA
0.3
VCC > 4.5V, ISINK = 1mA
VCC ≥ 2.25V, ISOURCE = 500µA
0.4
0.8 x VCC
VCC ≥ 4.5V, ISOURCE = 800µA
0.9 x VCC
Output not asserted low, VOUT = 28V
_______________________________________________________________________________________
nA
V
V
150
nA
High-Voltage, Adjustable
Sequencing/Supervisory Circuits
(VCC = 2.25V to 28V, VEN = VCC, TA = TJ = -40°C to +125°C, unless otherwise specified. Typical values are at VCC = 3.3V and TA =
+25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TIMING
VCC = 3.3V,
VIN rising,
VIN = VTH + 25mV
tDELAY
IN to OUT Propagation Delay
VCC = 12V,
VIN rising,
VIN = VTH + 25mV
tDL
Startup Delay (Note 3)
EN Minimum Input Pulse Width
MAX16052, 100kΩ
pullup resistor,
CCDELAY = 0
30
MAX16053,
CCDELAY = 0
30
MAX16052, 100kΩ
pullup resistor,
CCDELAY = 0.047µF
190
MAX16053,
CCDELAY = 0.047µF
190
MAX16052, 100kΩ
pullup resistor,
CCDELAY = 0
30
MAX16053,
CCDELAY = 0
30
EN to OUT Delay
ms
VCC = 3.3V, VIN falling, VIN = VTH - 30mV
18
VCC = 12V, VIN falling, VIN = VTH - 30mV
18
VCC = 2.25V, VIN = 0.525V, CCDELAY = 0
0.5
VCC = 12V, VIN = 12V, CCDELAY = 0
0.5
tMPW
1
EN Glitch Rejection
EN to OUT Delay
µs
tOFF
tPROP
From device
disabled to
device
enabled
MAX16052,
100kΩ pullup
resistor
MAX16053
MAX16052,
100kΩ pullup
resistor,
CCDELAY = 0
MAX16053,
CCDELAY = 0
ms
µs
100
From device
enabled to
device
disabled
µs
VCC = 3.3V
250
VCC = 12V
300
VCC = 3.3V
350
VCC = 12V
400
VCC = 3.3V
14
VCC = 12V
14
VCC = 3.3V
14
VCC = 12V
14
MAX16052, 100kΩ pullup
resistor, CCDELAY = 0.047µF
190
MAX16053, CCDELAY =
0.047µF
190
ns
ns
µs
ms
Note 1: All devices are production tested at TA = +25°C. Limits over temperature are guaranteed by design.
Note 2: When VCC falls below the UVLO threshold, the outputs deassert (OUT goes low). When VCC falls below 1.2V, the output
state cannot be determined.
Note 3: During the initial power-up, VCC must exceed 2.25V for at least 0.5ms before OUT can go high.
_______________________________________________________________________________________
3
MAX16052/MAX16053
ELECTRICAL CHARACTERISTICS (continued)
MAX16052/MAX16053
High-Voltage, Adjustable
Sequencing/Supervisory Circuits
VCC
VUVLO
VTH + 25mV
VTH - VHYST
IN
VTH
t < tPROP
EN
VIH
VIH
VIH
VIH
5%
VIL
VIL
t < tMPW
t > tMPW
VOH
OUT
VOL
tPROP
tDL
tDELAY
tOFF
Figure 1. MAX16052/MAX16053 Timing Diagram (CCDELAY = 0)
4
_______________________________________________________________________________________
tPROP
High-Voltage, Adjustable
Sequencing/Supervisory Circuits
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY CURRENT
vs. TEMPERATURE
27
24
36
32
ICC (µA)
ICC (µA)
MAX16052
40
21
18
15
VCC = 28V
28
VCC = 12V
24
12
20
9
16
6
3
12
0
4
VCC = 5V
VCC = 3.3V
8
0
4
8
12
16
20
24
28
VCC = 2.25V
-40 -25 -10 5 20 35 50 65 80 95 110 125
VCC (V)
TEMPERATURE (°C)
IN THRESHOLD VOLTAGE
vs. TEMPERATURE
OUT DELAY vs. CCDELAY
501.5
4500
4000
OUT DELAY (ms)
501.0
500.5
500.0
499.5
MAX16052/53 toc04
5000
MAX16052/53 toc03
502.0
3500
3000
2500
2000
1500
499.0
1000
498.5
500
0
498.0
0 100 200 300 400 500 600 700 800 900 1000
-40 -25 -10 5 20 35 50 65 80 95 110 125
CCDELAY (nF)
OUTPUT LOW VOLTAGE
vs. SINK CURRENT
OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
OUTPUT LOW VOLTAGE (V)
VCC = 28V
2.0
VCC = 12V
1.5
VCC = 5V
1.0
VCC = 3.3V
VCC = 2.25V
0.5
30
25
OUTPUT HIGH VOLTAGE (V)
2.5
MAX16052/53 toc05
TEMPERATURE (°C)
MAX16052/53 toc06
IN THRESHOLD VOLTAGE (mV)
MAX16052/53 toc02
MAX16052
VIN = 0V
30
44
MAX16052/53 toc01
33
VCC = 28V
20
VCC = 12V
VCC = 5V
15
VCC = 3.3V
10
VCC = 2.25V
5
0
0
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
ISINK (mA)
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
ISOURCE (mA)
_______________________________________________________________________________________
5
MAX16052/MAX16053
Typical Operating Characteristics
(VCC = 3.3V and TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
MAXIMUM TRANSIENT DURATION
vs. INPUT OVERDRIVE
ENABLE TURN-ON DELAY
(MAX16053)
ENABLE TURN-OFF DELAY
(MAX16053)
MAX16052/53 toc08
MAX16052/53 toc07
300
MAXIMUM TRANSIENT DURATION (µs)
250
MAX16052/53 toc09
EN
2V/div
200
EN
2V/div
RESET OCCURS ABOVE
THIS CURVE
150
OUT
2V/div
OUT
2V/div
100
50
0
10
1
100
1000
10µs/div
400ns/div
INPUT OVERDRIVE (mV)
IN LEAKAGE CURRENT
vs. TEMPERATURE
6
4
2
0
-2
-4
-6
1
MAX16052/53 toc11
VCC = 28V
VCC = VEN = VIN
VCC = 28V
VCC = VEN
IN LEAKAGE CURRENT (nA)
8
IN LEAKAGE CURRENT
vs. IN VOLTAGE
MAX16052/53 toc10
10
IN LEAKAGE CURRENT (mA)
MAX16052/MAX16053
High-Voltage, Adjustable
Sequencing/Supervisory Circuits
0
-1
-2
-3
-8
-10
6
-4
-40 -25 -10 5 20 35 50 65 80 95 110 125
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
TEMPERATURE (°C)
VIN (V)
_______________________________________________________________________________________
High-Voltage, Adjustable
Sequencing/Supervisory Circuits
EN LEAKAGE CURRENT
vs. IN VOLTAGE
VCC = 28V
VCC = VEN = VIN
6
4
2
0
-2
-4
1.0
0.8
MAX16052/53 toc13
EN LEAKAGE CURRENT (nA)
8
EN LEAKAGE CURRENT (nA)
10
MAX16052/53 toc12
EN LEAKAGE CURRENT
vs. TEMPERATURE
VCC = 28V
VCC = VIN
0.6
0.4
0.2
0
-0.2
-0.4
-6
-0.6
-8
-0.8
-1.0
-10
-40 -25 -10 5 20 35 50 65 80 95 110 125
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
TEMPERATURE (°C)
VEN (V)
Pin Description
PIN
NAME
1
EN
2
GND
3
IN
FUNCTION
Active-High Logic-Enable Input. Drive EN low to immediately deassert the output to its false state (OUT
= low) independent of VIN. With VIN above VTH, drive EN high to assert the output to its true state (OUT
= high) after the adjustable delay period. Connect EN to VCC, if not used.
Ground
High-Impedance Monitor Input. Connect IN to an external resistive divider to set the desired monitor
threshold. The output changes state when VIN rises above 0.5V and when VIN falls below 0.495V.
4
OUT
Active-High Sequencer/Monitor Output. Open-drain (MAX16052) or push-pull (MAX16053). OUT is
asserted to its true state (OUT = high) when VIN is above VTH and the enable input is in its true state (EN
= high) after the capacitor-adjusted delay period. OUT is deasserted to its false state (OUT = low)
immediately after VIN drops below 0.495V or the enable input is in its false state (EN = low). The
MAX16052 open-drain output requires an external pullup resistor.
5
VCC
Supply Voltage Input. Connect a 2.25V to 28V supply to VCC to power the device. For noisy systems,
bypass with a 0.1µF ceramic capacitor to GND.
6
CDELAY
Capacitor-Adjustable Delay Input. Connect an external capacitor (CCDELAY) from CDELAY to GND to
set the IN-to-OUT and EN-to-OUT delay period. For VIN rising, tDELAY = (CCDELAY x 4.0 x 106) + 30µs.
For EN rising, tPROP = (CCDELAY x 4.0 x 106) + 14µs.
_______________________________________________________________________________________
7
MAX16052/MAX16053
Typical Operating Characteristics (continued)
(VCC = 3.3V and TA = +25°C, unless otherwise noted.)
MAX16052/MAX16053
High-Voltage, Adjustable
Sequencing/Supervisory Circuits
VCC
REF
VCC
INTERNAL
VCC/UVLO
REF
IN
OUT
0.5V
INTERNAL
VCC/UVLO
IN
0.5V
CONTROL
LOGIC
EN
GND
CONTROL
LOGIC
EN
OUT
250nA
250nA
1.0V
1.0V
MAX16052
GND
MAX16053
CDELAY
CDELAY
Figure 2. Simplified Functional Diagram
Detailed Description
The MAX16052/MAX16053 family of high-voltage,
sequencing/supervisory circuits provide adjustable
voltage monitoring for inputs down to 0.5V. These
devices are ideal for use in power-supply sequencing,
reset sequencing, and power-switching applications.
Multiple devices can be cascaded for complex
sequencing applications.
The MAX16052/MAX16053 perform voltage monitoring
using a high-impedance input (IN) with an internally
fixed 0.5V threshold. When the voltage at IN falls below
0.5V or when the enable input is deasserted (EN = low)
OUT goes low. When VIN rises above 0.5V and the
enable input is asserted (EN = high), OUT goes high
after a capacitor-adjustable time delay.
With VIN above 0.5V, the enable input can be used to
turn on or off the output. Table 1 details the output state
depending on the various input and enable conditions.
8
Table 1. MAX16052/MAX16053
IN
EN
OUT
VIN < VTH
Low
Low
VIN < VTH
High
Low
VIN > VTH
Low
Low
VIN > VTH
High
OUT = High Impedance
(MAX16052)
OUT = VCC (MAX16053)
Supply Input (VCC)
The device operates with a VCC supply voltage from
2.25V to 28V. In order to maintain a 1.8% accurate
threshold at IN, VCC must be above 2.25V. When VCC
falls below the UVLO threshold, the output deasserts
low. When VCC falls below 1.2V, the output state is not
guaranteed. For noisy systems, connect a 0.1µF
ceramic capacitor from VCC to GND as close to the
device as possible.
_______________________________________________________________________________________
High-Voltage, Adjustable
Sequencing/Supervisory Circuits
Adjustable Delay (CDELAY)
When VIN rises above VTH with EN high, the internal
250nA current source begins charging an external
capacitor connected from CDELAY to GND. When the
voltage at CDELAY reaches 1V, the output asserts
(OUT goes high). When the output asserts, CCDELAY is
immediately discharged. Adjust the delay (tDELAY) from
when VIN rises above VTH (with EN high) to OUT going
high according to the equation:
t DELAY = C CDELAY × (4 × 10 6 Ω) + (30µ s)
where tDELAY is in seconds and CCDELAY is in Farads.
Enable Input (EN)
The MAX16052/MAX16053 offer an active-high enable
input (EN). With VIN above VTH, drive EN high to force
OUT high after the capacitor-adjustable delay time. The
EN-to-OUT delay time (tPROP) can be calculated from
when EN goes above the EN threshold using the equation:
t PROP = C CDELAY × (4 × 10 6 Ω) + (14µ s)
where tPROP is in seconds and CCDELAY is in Farads.
Drive EN low to force OUT low within 300ns for the
MAX16052 and within 400ns for the MAX16053.
additional variation in threshold, for example) and calculate R1 based on the desired monitored voltage
using the following formula:
⎡V
⎤
R1 = R2 × ⎢ MONITOR − 1⎥
VTH
⎣
⎦
where VMONITOR is the desired monitored voltage and
VTH is the reset input threshold (0.5V).
Pullup Resistor Values (MAX16052 Only)
The exact value of the pullup resistor for the open-drain
output is not critical, but some consideration should be
made to ensure the proper logic levels when the device
is sinking current. For example, if VCC = 2.25V and the
pullup voltage is 28V, keep the sink current less than
0.5mA as shown in the Electrical Characteristics table.
As a result, the pullup resistor should be greater than
56kΩ. For a 12V pullup, the resistor should be larger
than 24kΩ. Note that the ability to sink current is dependent on the VCC supply voltage.
Ensuring a Valid OUT
Down to VCC = 0V (Push-Pull OUT)
In applications in which OUT must be valid down to
VCC = 0V, add a pulldown resistor between OUT and
GND for the push-pull output (MAX16053). The resistor
sinks any stray leakage currents, holding OUT low
(Figure 3). The value of the pulldown resistor is not critical; 100kΩ is large enough not to load OUT and small
enough to pull OUT to ground. The external pulldown
cannot be used with the open-drain OUT output.
VCC
VCC
Output (OUT)
The MAX16052 offers an active-high, open-drain output
while the MAX16053 offers an active-high push-pull output. The push-pull output is referenced to VCC. The
open-drain output requires a pullup resistor and can be
pulled up to 28V.
OUT
MAX16053
100kΩ
Applications Information
Input Threshold
The MAX16052/MAX16053 monitor the voltage on IN
with an external resistive divider (Figure 4). R1 and R2
can have very high values to minimize current consumption due to low IN leakage currents (60nA max).
Set R2 to some conveniently high value (200kΩ for ±1%
GND
Figure 3. Ensuring OUT Valid to VCC = 0V
_______________________________________________________________________________________
9
MAX16052/MAX16053
Monitor Input (IN)
Connect the center point of a resistive divider to IN to
monitor external voltages (see R1 and R2 of Figure 4). IN
has a rising threshold of VTH = 0.5V and a falling threshold of 0.495V (5mV hysteresis). When VIN rises above
VTH and EN is high, OUT goes high after the adjustable
tDELAY period. When VIN falls below 0.495V, OUT goes
low after a 18µs delay. IN has a maximum input current
of 60nA, so large value resistors are permitted without
adding significant error to the resistive divider.
MAX16052/MAX16053
High-Voltage, Adjustable
Sequencing/Supervisory Circuits
Typical Application Circuits
Figures 4–6 show typical applications for the
MAX16052/MAX16053. Figure 4 shows the MAX16052
used with a p-channel MOSFET in an overvoltage protection circuit. Figure 5 shows the MAX16053 in a lowvoltage sequencing application using an n-channel
MOSFET. Figure 6 shows the MAX16053 used in a multiple output sequencing application.
Using an n-Channel Device
for Sequencing
In higher power applications, using an n-channel
device reduces the loss across the MOSFET as it offers
a lower drain-to-source on-resistance. However, an nchannel MOSFET requires a sufficient VGS voltage to
fully enhance it for a low R DS_ON . The application
shown in Figure 5 shows the MAX16053 in a switch
sequencing application using an n-channel MOSFET.
Similarly, if a higher voltage is present in the system, the
open-drain version can be used in the same manner.
Power-Supply Bypassing
In noisy applications, bypass VCC to ground with a
0.1µF capacitor as close to the device as possible. The
additional capacitor improves transient immunity. For
fast-rising VCC transients, additional capacitors may be
required.
3.3V ALWAYS-ON
5V BUS
1.2V
INPUT
N
1.2V
OUTPUT
P
0 TO 28V
MONITORED
3.3V
RPULLUP
EN
EN
VCC
VCC
R1
OUT
R1
OUT
MAX16053
MAX16052
IN
IN
CDELAY
R2
R2
GND
Figure 4. Overvoltage Protection
10
CDELAY
CCDELAY
GND
CCDELAY
Figure 5. Low-Voltage Sequencing Using an n-Channel MOSFET
______________________________________________________________________________________
High-Voltage, Adjustable
Sequencing/Supervisory Circuits
DC-DC
5V BUS
DC-DC
EN
1.2V
1.8V
DC-DC
DC-DC
EN
EN
EN
SYSTEM
ENABLE
EN
VCC
EN
IN
VCC
EN
IN
MAX16053
OUT
CCDELAY
EN
IN
MAX16053
OUT
VCC
IN
MAX16053
MAX16053
OUT
GND
GND
GND
VCC
CCDELAY
OUT
GND
CCDELAY
CCDELAY
Figure 6. Multiple Output Sequencing
Chip Information
PROCESS: BiCMOS
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.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.
PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
6 SOT23
U6+1
21-0058
______________________________________________________________________________________
11
MAX16052/MAX16053
2.5V
3.3V
MAX16052/MAX16053
High-Voltage, Adjustable
Sequencing/Supervisory Circuits
Revision History
REVISION
NUMBER
REVISION
DATE
0
5/08
Initial release
1
10/08
Update Adjustable Delay (CDELAY) and Power-Supply Bypassing
sections.
2
1/10
Revised the Features, General Description, Absolute Maximum
Ratings, Electrical Characteristics, Typical Operating Characteristics,
and the Supply Input (VCC) sections.
DESCRIPTION
PAGES
CHANGED
—
9, 10
1, 2, 5–8
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.
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