Datasheet
3-Pin, Low-Power
µP Reset Circuits
_______________________________________________________________________________________
3
3.0
4.0
3.5
5.0
4.5
6.0
5.5
6.5
-50 0 25-25 50 75 100 125
SUPPLY CURRENT vs. TEMPERATURE
MAX6800/01/02 toc01
TEMPERATURE (
°
C)
I
CC
(µA)
V
CC
= +5.0V
V
CC
= +3.3V
0.950
0.980
0.970
0.960
1.000
0.990
1.040
1.030
1.020
1.010
1.050
-50 -25 0 25 50 75 100 125
NORMALIZED RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX6800/01/02 toc02
TEMPERATURE (
°
C)
NORMALIZED RESET TIMEOUT PERIOD
0
30
20
10
50
40
90
80
70
60
100
-50 -25 0 25 50 75 100 125
V
CC
FALLING PROPAGATION DELAY
vs. TEMPERATURE
MAX6800/01/02 toc06
TEMPERATURE (
°
C)
PROPAGATION DELAY (µs)
V
CC
= FALLING AT 1V/ms
V
CC
= FALLING AT 10V/ms
100 1000
0
100
200
400
300
500
600
0.1 1 10
MAXIMUM TRANSIENT DURATION
vs. RESET COMPARATOR OVERDRIVE
MAX6800/01/02 toc05
RESET COMPARATOR OVERDRIVE (mV)
MAXIMUM TRANSIENT DURATION (µs)
RESET OCCURS
RESET DOES
NOT OCCUR
100
75
50
25
0
1.0 2.01.5 2.5 3.0
RESET (V
OH
)
vs. SUPPLY VOLTAGE
MAX6800/01/02 toc04
V
CC
(V)
OUTPUT VOLTAGE HIGH (V
CC
- V
OH
) (mV)
T
A
= +25°C
T
A
= -40°C
T
A
= +125°C
T
A
= +85°C
V
TH
= 2.93V
I
SOURCE
= 100µA
RESET ASSERTED
(MAX6800)
80
60
40
20
0
1.0 1.5 2.0 2.5 3.0
RESET (V
OL
)
vs. SUPPLY VOLTAGE
MAX6800/01/02 toc03
V
CC
(V)
OUTPUT VOLTAGE LOW (mV)
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
V
TH
= 2.93V
I
SINK
= 500µA
RESET ASSERTED
MAX6801/MAX6802
Typical Operating Characteristics
(Reset not asserted, T
A
= +25°C, unless otherwise noted.)
MAX6800/MAX6801/MAX6802
Pin Description
PIN
NAME FUNCTION
MAX6800
MAX6801/
MAX6802
1 1 GND Ground
— 2
RESET
Active-Low Reset Output. RESET is asserted while V
CC
is below the reset
threshold and remains asserted for a reset timeout period (t
RP
) after V
CC
rises above the reset threshold. RESET on the MAX6801 is push/pull.
RESET on the MAX6802 is open-drain.
2 — RESET
Active-High Reset Output. RESET is asserted while V
CC
is below the reset
threshold and remains asserted for a reset timeout period (t
RP
) after V
CC
rises above the reset threshold. RESET on the MAX6800 is push/pull.
3 3 V
CC
Supply Voltage Input