Operating Temperature Range ...........................-40°C to +85°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
(V
CC
= +0.55V to +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
T
A
= -40°C to +85°C
MAX6832/MAX6835/MAX6838
MAX6834/MAX6837/MAX6840
Supply Voltage Range
V
CC
T
A
= -40°C to +85°C
MAX6833/MAX6836/MAX6839
T
A
= 0°C to +85°C
MAX6833/MAX6836/MAX6839
V
CC
= 1.2V, no load, reset not asserted
Supply Current
I
CC
V
CC
= 1.8V, no load, reset not asserted
V
CC
= 3.6V, no load, reset not asserted
W
V
Reset Threshold
V
TH
I
H
G
F (Note 2)
RESET-IN Threshold
RESET-IN Leakage Current
Reset Threshold Hysteresis
V
CC
or RESET-IN to Reset Delay
V
RSTIN
I
RSTIN
V
HYS
V
CC
falling, step signal from
(V
TH
+ 100mV) to (V
TH
- 100mV)
D0
D1
Reset Active Timeout Period
t
RP
D2
D3
D4
1
20
140
1120
1.1V
≤
V
CC
≤
3.3V, 0°C to +85°C
1.1V
≤
V
CC
≤
3.3V, -40°C to +85°C
1.620
1.530
1.350
1.275
1.080
1.020
-2.5%
-3.0%
-25
0.75
60
0.07
1.5
30
210
1680
2
40
280
2240
ms
MIN
0.55
TYP
MAX
3.6
V
UNITS
0.85
0.75
7.5
9
16
1.665
1.575
1.388
1.313
1.110
1.050
444
444
3.6
3.6
13
16
25
1.710
1.620
1.425
1.350
1.140
1.080
+2.5%
+3.0%
+25
µA
V
mV
nA
%V
TH
µs
2
Maxim Integrated
MAX6832–MAX6840
Ultra-Low-Voltage SC70 Voltage Detectors
and µP Reset Circuits
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +0.55V to +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Propagation Delay (D0 only)
Startup Time (D0 only)
MR
Input Voltage
MR
Minimum Input Pulse Width
MR
Glitch Rejection
MR
to Reset Delay
MR
Pullup Resistance To V
CC
Open-Drain
RESET
Output
Voltage
Open-Drain
RESET
Output
Leakage Current
V
CC
≥
0.55V, I
SINK
=15µA, reset asserted
V
OL
V
CC
≥
1.0V, I
SINK
= 80µA, reset asserted
V
CC
≥
1.5V, I
SINK
= 200µA, reset asserted
I
LKG
V
CC
> V
TH,
reset not asserted
V
CC
≥
0.55V, I
SINK
= 15µA, reset asserted
V
OL
Push-Pull
RESET
Output
Voltage
V
OH
V
CC
≥
1.0V, I
SINK
= 80µA, reset asserted
V
CC
≥
1.5V, I
SINK
= 200µA, reset asserted
V
CC
≥
1.1V, I
SOURCE
= 50µA, reset not
asserted
V
CC
≥
1.5V, I
SOURCE
= 150µA, reset asserted
V
CC
≥
0.75V, I
SOURCE
= 10µA, reset asserted
(Note 2)
Push-Pull RESET Output
Voltage
V
OH
V
CC
≥
0.85V, I
SOURCE
= 10µA, reset asserted
V
CC
≥
1.0V, I
SOURCE
= 50µA, reset asserted
V
CC
≥
1.5V, I
SOURCE
= 150µA, reset asserted
V
OL
V
CC
≥
1.1V, I
SINK
= 80µA, reset not asserted
V
CC
≥
1.5V, I
SINK
= 200µA, reset not asserted
0.8 x V
CC
0.8 x V
CC
0.8 x V
CC
0.8 x V
CC
0.8 x V
CC
0.8 x V
CC
0.2 x V
CC
0.2 x V
CC
V
V
IL
V
IH
MR
driven from V
CC
to 0
MR
driven from V
CC
to 0
MR
driven from V
CC
to 0
14
0.7 x V
CC
2
100
500
20
26
0.15
0.15
0.2
1.0
0.2 x V
CC
0.2 x V
CC
0.2 x V
CC
V
µA
V
SYMBOL
t
P
CONDITIONS
V
CC
rising, step signal
from (V
TH
- 100mV) to (V
TH
+ 100mV)
V
CC
rising from 0 to 1.1V (t
R
< 1µs)
MIN
TYP
70
150
0.3 x V
CC
MAX
UNITS
µs
µs
V
µs
ns
ns
kΩ
Note 1:
100% production tested at +25°C. Over temperature limits are guaranteed by design.
Note 2:
Temperature range is from 0°C to +85°C.
Maxim Integrated
3
MAX6832–MAX6840
Ultra-Low-Voltage SC70 Voltage Detectors
and µP Reset Circuits
Typical Operating Characteristics
(V
CC
= full range and T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C).
POWER-DOWN RESET DELAY
vs. TEMPERATURE
MAX6832-40 toc01
SUPPLY CURRENT vs. TEMPERATURE
16
V
CC
= 3.6V
14
V
CC
= 3.0V
SUPPLY CURRENT (µA)
12
10
8
6
4
2
0
-40
-20
0
20
40
TEMPERATURE (°C)
60
80
V
CC
= 0.55V
0
-40
V
CC
= 2.5V
V
CC
= 1.8V
V
CC
= 1.5V
300
POWER-DOWN RESET DELAY (µs)
250
200
V
OD
= OVERDRIVE (mV)
V
OD
= 10mV
150
V
OD
= 20mV
100
50
V
OD
= 100mV
V
OD
= 200mV
-20
0
20
40
60
80
TEMPERATURE (°C)
NORMALIZED POWER-UP RESET
TIMEOUT vs. TEMPERATURE
MAX6832-40 toc03
NORMALIZED RESET THRESHOLD
vs. TEMPERATURE
V
TH
= 1.665V
1.002
1.001
1.000
0.999
0.998
0.997
0.996
0.995
MAX6832-40 toc04
1.06
NORMALIZED RESET TIMEOUT PERIOD
1.04
1.02
1.00
D2 OPTION
0.98
0.96
0.94
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
D1 OPTION
1.003
NORMALIZED RESET THRESHOLD
0.994
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
4
Maxim Integrated
MAX6832-40 toc02
MAX6832–MAX6840
Ultra-Low-Voltage SC70 Voltage Detectors
and µP Reset Circuits
Pin Description—MAX6832–MAX6837
PIN
MAX6833
SC70-3
1
MAX6832/
MAX6834
SC70-3
1
MAX6836
SC70-4
1
MAX6835/
MAX6837
SC70-4
1
NAME
FUNCTION
GND
Ground
Reset Output, Open-Drain or Push-Pull, Active-Low.
RESET
changes from HIGH to LOW when V
CC
drops below the
selected reset threshold or
MR
is pulled low.
RESET
remains
LOW for the reset timeout period after V
CC
exceeds the device
reset threshold and
MR
is released high.
Reset Output, Push-Pull, Active-High. RESET changes from
LOW to HIGH when the V
CC
input drops below the selected
reset threshold or
MR
is pulled low. RESET remains HIGH for
the reset timeout period after V
CC
exceeds the device reset
threshold and
MR
is released high.
Active-Low Manual Reset Input. Internal 20kΩ pullup to V
CC
.
Pull LOW to force a reset. Reset remains active as long as
MR
is
LOW and for the reset timeout period after
MR
goes HIGH.
Leave unconnected or connect to V
CC
if unused.
Supply Voltage and Monitored Supply
—
2
—
2
RESET
2
—
2
—
RESET
—
—
3
3
MR
3
3
4
4
V
CC
Pin Description—MAX6838/MAX6839/MAX6840
PIN
MAX6839
SC70-4
MAX6838/
MAX6840
SC70-4
NAME
FUNCTION
1
1
RESET-IN
Adjustable Reset Threshold Input. High-impedance input for reset comparator. Connect
this pin to an external resistive-divider network to set the reset threshold voltage; the
typical threshold is 444mV. Reset is asserted when RESET-IN is below the threshold (V
CC
is not monitored).
Supply Voltage (1.1V to 3.3V)
Ground
Reset Output, Push-Pull, Active-High. RESET changes from LOW to HIGH when the
RESET-IN input drops below the typical reset threshold (444mV). RESET remains HIGH for
the reset timeout period after RESET-IN exceeds the reset threshold.
Reset Output, Open-Drain or Push-Pull, Active-Low.
RESET
changes from HIGH to LOW
when RESET-IN drops below the typical reset threshold (444mV).
RESET
remains LOW for
the reset timeout period after RESET-IN exceeds the reset threshold.
3.050782] yaffs: dev is 32505860 name is "mtdblock4" rw
yaffs: passed flags ""
yaffs: dev is 32505862 name is "mtdblock6" rw
烧写进SD卡和inand ，一直提示下面的信息
yaffs: pa ......
LED 是light emitting diode (发光二极管)的缩写,是一种由半导体技术制成的电光源。LED的核心部分是由P型半导体和N型半导体组成的晶片,在P型半导体和N型半导体之间有一个过渡层,称为P2N结。在正向导通时,半导体中的多数载流子和少数载流子复合,释放出的能量以光子或部分以光子的形式发射出来,大量的光子形成光子流,即发光。P2N结加反向电压时,少数载流子难以注入,故不发...[详细]
stm32/stm8
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