Datasheet

(V
CC
= 5V, C
SRT
= 1500pF, T
A
= +25°C, unless otherwise noted.)
0.994
0.998
0.996
1.002
1.000
1.004
1.006
-50 25 50-25 0 75 100 125
NORMALIZED RESET THRESHOLD
vs. TEMPERATURE
MAX6421/26 toc08
TEMPERATURE (°C)
NORMALIZED RESET THRESHOLD
POWER-UP/POWER-DOWN
CHARACTERISTIC
MAX6421/26 toc07
1V/div
1V/div
V
CC
RESET
V
TH
= 1.6V
400s/div
V
CC
TO RESET DELAY
vs. TEMPERATURE (V
CC
FALLING)
MAX6421/26 toc06
80
90
110
100
140
150
130
120
160
V
CC
TO RESET DELAY Sµs)
-50 0 25-25
50
75 100 125
TEMPERATURE (°C)
V
CC
FALLING AT 1mVs
0
50
25
100
75
150
125
175
0 400200 600 800 1000
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
MAX6421/26 toc05
RESET THRESHOLD OVERDRIVE (mV)
TRANSIENT DURATION (s)
RESET OCCURS
ABOVE THE CURVE
V
TH
= 2.95V
RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX6421/26 toc04
200
250
350
300
500
550
450
400
600
RESET TIMEOUT PERIOD (µs)
-50 0 25-25
50
75 100 125
TEMPERATURE (°C)
C
SRT
= 0
4.10
4.20
4.15
4.25
4.30
-50 0-25 25 50 75 100 125
RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX6421/26 toc03
TEMPERATURE (°C)
RESET TIMEOUT PERIOD (ms)
C
SRT
= 1500pF
0.1
1
100
10
1000
10,000
0.001 0.10.01 1 10
100
1000
RESET TIMEOUT PERIOD vs. C
SRT
MAX6421/26 toc02
C
SRT
(nF)
RESET TIMEOUT PERIOD (ms)
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0 21 3 4 5 6
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6421/26 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
T
A
= +25°C
T
A
= +125°C
T
A
= -40°C
Maxim Integrated │ 3
www.maximintegrated.com
MAX6340/MAX6421–
MAX6426
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Typical Operating Characteristics