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
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
PARAMETER
Supply Voltage Range
Supply Current
(V
CC
= 1V to 5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are at V
CC
= 5V and T
A
= +25°C.) (Note 1)
SYMBOL
V
CC
I
CC
V
TH
V
HYST
t
RD
t
RP
I
RAMP
VTH-RAMP
CONDITIONS
V
CC
≤ 5.0V
V
CC
≤ 3.3V
V
CC
≤ 2.0V
T
A
= +25°C
MIN
1.0
TYP
2.5
1.9
1.6
MAX
5.5
4.2
3.4
2.5
V
TH
+ 1.5%
V
TH
+ 2.5%
UNITS
V
µA
V
CC
Reset Threshold Accuracy
Hysteresis
V
CC
to Reset Delay
Reset Timeout Period
V
SRT
Ramp Current
V
SRT
Ramp Threshold
T
A
= -40°C to +125°C
V
CC
falling at 1mV/µs
C
SRT
= 1500pF
C
SRT
= 0
V
TH
- 1.5%
V
TH
- 2.5%
V
mV
µs
ms
nA
V
mV
4 x V
TH
80
4.375
0.275
240
0.65
33
3.00
5.75
V
SR
T = 0 to 0.65V; V
CC
= 1.6V to 5V
V
CC
= 1.6V to 5V (V
RAMP
rising)
V
RAMP
falling threshold
V
CC
≥ 1.0V, I
SINK
= 50µA
RAMP Threshold Hysteresis
RESET
Output Voltage Low
V
OL
0.3
0.3
0.4
0.8 x V
CC
0.8 x V
CC
0.8 x V
CC
1.0
0.8 x V
CC
0.8 x V
CC
0.8 x V
CC
0.8 x V
CC
0.3
0.3
0.4
V
V
µA
V
V
V
CC
≥ 2.7V, I
SINK
= 1.2mA
V
CC
≥ 4.5V, I
SINK
= 3.2mA
V
CC
≥ 1.8V, I
SOURCE
= 200µA
V
CC
≥ 4.5V, I
SOURCE
= 800µA
V
CC
> V
TH
, reset not asserted
V
CC
≥ 1.0V, I
SOURCE
= 1µA
V
CC
≥ 1.8V, I
SOURCE
= 150µA
V
CC
≥ 2.7V, I
SOURCE
= 500µA
V
CC
≥ 4.5V, I
SOURCE
= 800µA
V
CC
≥ 1.8V, I
SINK
= 500µA
V
CC
≥ 2.7V, I
SINK
= 1.2mA
V
CC
≥ 4.5V, I
SINK
= 3.2mA
RESET
Output Voltage High,
Push-Pull
RESET
Output Leakage Current,
Open-Drain
V
OH
I
LKG
V
CC
≥ 2.25V, I
SOURCE
= 500µA
RESET Output Voltage High
V
OH
RESET Output Voltage Low
V
OL
Note 1:
Devices production tested at +25°C. Overtemperature limits are guaranteed by design.
www.maximintegrated.com
Maxim Integrated
│
2
MAX6340/MAX6421–
MAX6426
Typical Operating Characteristics
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
(V
CC
= 5V, C
SRT
= 1500pF, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6421/26 toc01
MAX6421/26 toc02
RESET TIMEOUT PERIOD (ms)
SUPPLY CURRENT (µA)
3.0
2.5
2.0
1.5
1.0
0.5
0
0
1
2
3
4
5
T
A
= +25°C
T
A
= -40°C
1000
100
10
1
0.1
0.001
RESET TIMEOUT PERIOD (ms)
3.5
T
A
= +125°C
C
SRT
= 1500pF
4.25
4.20
4.15
6
0.01
0.1
1
C
SRT
(nF)
10
100
1000
4.10
-50
-25
0
25
50
75
100
125
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
MAX6421/26 toc04
MAX6421/26 toc05
550
RESET TIMEOUT PERIOD (µs)
500
450
400
350
300
250
200
-50
-25
0
25
50
75
C
SRT
= 0
150
TRANSIENT DURATION (s)
125
100
75
50
25
V
TH
= 2.95V
0
200
400
600
800
RESET OCCURS
ABOVE THE CURVE
150
V
CC
TO RESET DELAY Sµs)
140
130
120
110
100
90
V
CC
FALLING AT 1mVs
100
125
0
1000
80
-50
-25
0
TEMPERATURE (°C)
RESET THRESHOLD OVERDRIVE (mV)
25
75
50
TEMPERATURE (°C)
100
125
POWER-UP/POWER-DOWN
CHARACTERISTIC
MAX6421/26 toc07
NORMALIZED RESET THRESHOLD
vs. TEMPERATURE
NORMALIZED RESET THRESHOLD
MAX6421/26 toc08
V
CC
V
TH
= 1.6V
1.006
1.004
1.002
1.000
0.998
0.996
0.994
1V/div
1V/div
RESET
400s/div
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
www.maximintegrated.com
Maxim Integrated
│
3
MAX6421/26 toc06
600
RESET TIMEOUT PERIOD
vs. TEMPERATURE
175
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
160
V
CC
TO RESET DELAY
vs. TEMPERATURE (V
CC
FALLING)
MAX6421/26 toc03
4.0
10,000
RESET TIMEOUT PERIOD vs. C
SRT
4.30
RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX6340/MAX6421–
MAX6426
Pin Description
PIN
MAX6340
SOT23
1
MAX6421
MAX6422
MAX6423
SOT143
3
SC70
3
MAX6424
MAX6425
SOT23
5
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
MAX6426
SOT23
1
NAME
FUNCTION
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 × 10
6
× C
SRT
+ 275µs with
t
RP
in seconds and C
SRT
in farads
Ground
Not Internally Connected. Can be connected to GND
Supply Voltage and Reset Threshold Monitor Input
RESET
changes from high to low whenever V
CC
drops
below the selected reset threshold voltage.
RESET
remains low for the reset timeout period after V
CC
exceeds
the reset threshold
RESET changes from low to high whenever V
CC
drops
below the selected reset threshold voltage. RESET
remains high for the reset timeout period after V
CC
exceeds the reset threshold
2
3
4
1
—
2
2
—
1
3
4
2
2, 3
—
5
GND
N.C.
V
CC
RESET
5
4
—
4
1
4
—
—
RESET
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 V
CC
drops
below the threshold voltage. Once V
CC
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 V
CC
> 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 10kΩ to 100kΩ pullup is sufficient in most
I haven't posted for a long time. Today I read an article and felt very touched. I sent it to everyone: Taking advantage of one's age is a common problem of human beings after walking too many bridges...
Sate210-F development board has V1.0 and V1.1. The main difference between V1.0 and V1.1 is the key interrupt and capacitive screen interrupt. V1.0 is the one released at the end of 2013. V1.1 is the ...
1. Senior managers attach great importance to the introduction of performance management, which is a major organizational change for the enterprise. On the one hand, the introduction of performance ma...
After iar was upgraded to version 5.4, the original code could not be burned in. I have been searching for version 5.1 on the Internet for a long time but have not found it. Can anyone send me a copy?...
I have created a simple exe file (Windows platform) in the VS2008 development environment. Now I want to know how to open this exe file in the WinCE platform. What work do I need to do? What are the s...
An ideal power system should supply power to users at a constant frequency (50Hz) and sinusoidal waveform at a specified voltage level (nominal voltage). In a three-phase AC power system, the voltage ...
introduction
Bluetooth technology is a short-range wireless communication technology designed to replace wired cables. It is a wireless communication technology standard developed by the SIG, ...[Details]
introduction
Sonar imaging is of great significance in marine resource development and defense. Its long range, intuitive display of the observed area, and target identification make it widely...[Details]
Industrial computers with GPUs leverage powerful parallel processing to build deep learning models to analyze and respond to optical inputs. The systems develop an understanding of visual data to i...[Details]
Over the past decade, the narrative surrounding fuel vehicles has been one of decline and replacement. Under the onslaught of new energy vehicles, traditional automakers have been forced to acceler...[Details]
For self-driving cars, LiDAR is the sensory organ that allows them to "see the road." Simply put, its operating principle involves sending out a laser beam, receiving the echo, and ultimately gener...[Details]
Compiled from semiengineering
The industry is increasingly concerned about power consumption in AI, but there are no simple solutions. This requires a deep understanding of software and ...[Details]
In the wave of electrification and intelligence in the automotive industry, the E/E architecture is transitioning from distributed to domain control and then to regional architecture.
Th...[Details]
introduction
Whether in the automotive entertainment or home theater system markets, consumers continue to demand more channels and speakers, each capable of handling higher audio po...[Details]
Chip architecture licensing company ARM has hired Amazon's AI chip chief Rami Sinno to help advance its plan to develop its own complete chip, people familiar with the matter said, according to Reu...[Details]
1. When the variable frequency motor stops, the heat source is gone, and the radiation and heat conduction functions of the heat dissipation components themselves are sufficient to ensure that the ...[Details]
On August 8, PetroChina Southwest Oil & Gas Field Company's 35kV Zhouping Line centralized battery energy storage system successfully completed a 24/7 trial run, achieving full compliance with all ...[Details]
On August 18, John Krafcik, former CEO of Google's Waymo, recently questioned Tesla's Robotaxi service. He said: "Please notify me when Tesla launches Robotaxi. I'm still waiting. If there are empl...[Details]
On August 15, CCTV News quoted Reuters as saying that sources revealed that the US government has implanted secret trackers in some shipments of technology products using AI chips in an attempt to ...[Details]
The penetration of high-end intelligent driving is accelerating, and the wire-controlled chassis has emerged.
The demand for intelligent vehicles is driving the continuous upgrade of...[Details]
Demonstrating Ceva’s technological leadership and deep collaboration with industry partners for over two decades,
To meet the industry's accelerating demand for ubiquitous edge AI
...[Details]
Talking
京公网安备 11010802033920号
EEWORLD
