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
(V
CC
= +1.2V to +5.5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Operating Voltage Range
SYMBOL
V
CC
CONDITIONS
T
A
= 0°C to +125°C
T
A
= -40°C to 0°C
V
CC
= +5.5V, no load
Supply Current
I
CC
V
CC
= +3.6V, no load
V
CC
= +2.5V, no load
V
CC
= +1.8V, no load
VCC Reset Threshold
(See the Reset Threshold Table)
VCC Reset Delay
VCC Reset Timeout Period
MR
Timeout Period
MR
Rising Debounce Period
(Note 2)
T
A
= +25°C
V
TH
T
A
= -40°C to +85°C
T
A
= +85°C to +125°C
t
RD
t
RP
t
MRP
t
DEB
V
IL
MR
Input Voltage
V
IH
V
IL
V
IH
MR
Minimum Input Pulse
MR
Glitch Rejection
MR
to
RESET
Delay
MR
Pullup Resistance
RESET
Output High
(MAX6468 Only)
MR
to V
CC
VOH
V
CC
≥ +2.5V, I
SOURCE
= 500µA,
RESET
not asserted
V
CC
≥ +4.5V, I
SOURCE
= 800µA,
RESET
not asserted
500
0.8 x V
CC
0.8 x V
CC
V
CC
falling at 10mV/µs from V
TH
+ 100mV
to V
TH
- 100mV
D3 option
D7 option
D3 and D7 options
D3 and D7 options
V
TH
< +4V
V
TH
≥ +4V
150
1200
150
150
-1.5%
-2.5%
-3%
35
225
1800
225
225
300
2400
300
300
0.3 x V
CC
0.7 x V
CC
0.8
2.4
1
100
200
1560
3000
µs
ns
ns
Ω
V
MIN
1.0
1.2
7
6
4
3
V
TH
TYP
MAX
5.5
5.5
13
11
8
7.5
+1.5%
+2.5%
+3%
µs
ms
ms
ms
V
µA
UNITS
V
V
www.maximintegrated.com
Maxim Integrated
│
2
MAX6467/MAX6468
Microprocessor Supervisory Reset Circuits
with Edge-Triggered, One-Shot Manual Reset
Electrical Characteristics
(V
CC
= +1.2V to +5.5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
V
CC
≥ +1V, I
SINK
= 80µA,
RESET
asserted
RESET
Output Low
V
OL
V
CC
≥ +2.5V, I
SINK
= 1.2mA,
RESET
asserted
V
CC
≥ +4.5V, I
SINK
= 3.2mA,
RESET
asserted
RESET
Output Leakage Current
(MAX6467 Only)
I
LKG
RESET
not asserted
MIN
TYP
MAX
0.3
0.3
0.3
1
µA
V
UNITS
Note 1:
Specifications over temperature are guaranteed by design. Production testing at T
A
= +25°C only.
Note 2:
The
MR
input ignores falling edges that occur within the
MR
rising debounce period (t
DEB
) after
MR
first rises from low to
high (after a valid
MR
reset assertion). This prevents invalid reset assertion due to switch bounce.
Typical Operating Characteristics
SUPPLY CURRENT vs. TEMPERATURE
MAX6467 toc01
(V
CC
= +5V, MAX6468US29D3 device, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX6467 toc02
9
SUPPLY CURRENT (µA)
8
7
6
5
4
3
2
1
0
V
CC
= +5.5V
7
6
5
4
3
2
1
0
V
CC
TO RESET DELAY (µs)
V
CC
= +3.6V
9
SUPPLY CURRENT (µA)
8
V
CC
= V
TH
+ 100mV TO V
TH
- 100mV
24
22
20
18
16
V
CC
= +2.5V
V
CC
= +1.8V
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
MAX6467 toc04
MAX6467 toc05
208
207
206
205
204
203
202
201
200
NORMALIZED RESET THRESHOLD (V)
209
RESET TIMEOUT PERIOD (ms)
V
CC
= 5.0V
1.005
V
OL
(mV)
1.000
0.995
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
0.990
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
400
350
300
250
200
150
100
50
0
0
1
2
3
4
5
6
7
8
9
10
I
SINK
(mA)
www.maximintegrated.com
Maxim Integrated
│
3
MAX6467 toc06
210
RESET TIMEOUT PERIOD
vs. TEMPERATURE
1.010
NORMALIZED RESET THRESHOLD
vs. TEMPERATURE
600
550
500
450
OUTPUT VOLTAGE LOW
vs. SINK CURRENT
MAX6467 toc03
10
10
26
V
CC
TO RESET DELAY
vs. TEMPERATURE
MAX6467/MAX6468
Microprocessor Supervisory Reset Circuits
with Edge-Triggered, One-Shot Manual Reset
Typical Operating Characteristics
(V
CC
= +5V, MAX6468US29D3 device, T
A
= +25°C, unless otherwise noted.)
MAXIMUM TRANSIENT DURATION (µs)
5.0
4.5
4.0
3.5
V
OH
(V)
3.0
2.5
2.0
1.5
1.0
0.5
0
0
1
2
3
4
5
V
CC
= +5.0V
MAX6467 toc07
500
400
300
200
100
0
RESET
ASSERTS
ABOVE THIS LINE
6
7
8
0
10
20
30
40
50
60
I
SOURCE
(mA)
RESET THRESHOLD OVERDRIVE (mV)
MR
TO
RESET
DELAY (ns)
115
110
105
100
95
90
85
80
75
70
65
60
MAX6467 toc09
120
MR
TO
RESET
DELAY
vs. TEMPERATURE
PROPAGATION DELAY
(WITH 100mV OVERDRIVE)
MAX6467 toc10
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
4µs/div
RESET PULLUP AND PULLDOWN RESPONSE
MAX6467 toc11
RESET TIMEOUT PERIOD
MAX6467 toc12
C
RESET
= 47pF, R
PULLUP
= 100kΩ,
V
PULLUP
= 1.6V
1.675V
V
CC
200mV/div
1.475V
1.6V
RESET
500mV/div
MAX6467_S16D3-T
40µs/div
0
40ms/div
www.maximintegrated.com
MAX6467 toc08
5.5
OUTPUT VOLTAGE HIGH
vs. SOURCE CURRENT
600
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
3.0V
V
CC
100mV/div
AC-COUPLED
2.8V
3V
RESET
1V/div
0
3.3V
V
CC
2V/div
0
3.3V
RESET
2V/div
0
Maxim Integrated
│
4
MAX6467/MAX6468
Microprocessor Supervisory Reset Circuits
with Edge-Triggered, One-Shot Manual Reset
Pin Configurations
TOP VIEW
GND 1
RESET
2
4
V
CC
MR
GND 1
RESET
2
MAX6467XS
MAX6468XS
3
MAX6467US
MAX6468US
4
3
V
CC
MR
SC70
SOT143
Pin Description
PIN
1
NAME
GND
Ground
Reset Output.
RESET
is an active-low open-drain (MAX6467) or push-pull (MAX6468) output.
RESET
asserts low when V
CC
drops below the selected threshold and remains low for the V
CC
reset timeout period
after V
CC
rises above the threshold. The
RESET
one-shot asserts low for a fixed
MR
reset timeout period on
the falling edge of the manual reset input. The open-drain output requires an external pullup resistor
Manual Reset Input. Drive
MR
low to initiate a reset output.
MR
controls an edge-triggered one-shot that
asserts
RESET
low for a fixed
MR
timeout period when
MR
is driven low. Internal timing circuitry ignores
switch close and open bounce to ensure proper one-shot reset timing
Power-Supply Input. V
CC
provides power to the device and is also a monitored voltage. When V
CC
drops
below the selected threshold,
RESET
asserts low and remains low for the reset timeout period after V
CC
rises above the threshold. For better noise immunity, bypass V
PCB设计
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