Datasheet

Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
MAX6412–MAX6420
3
Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(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)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
CC
≥ 1.8V, I
SINK
= 500µA 0.3
V
CC
≥ 2.7V, I
SINK
= 1.2mA 0.3RESET Output Voltage LOW V
OL
V
CC
≥ 4.5V, I
SINK
= 3.2mA 0.4
V
RESET IN Leakage Current 10 nA
RESET IN Threshold V
RST
V
RST
falling, V
CC
= 1.6V to 5.0V 1.205 1.255 V
V
IL
0.8
V
IH
V
CC
> 4.0V
2.4
V
IL
0.3 x V
CC
MR Input
V
IH
V
CC
< 4.0V
0.7 x V
CC
V
MR Minimum Pulse Width 1µs
MR Glitch Rejection 75 ns
MR to RESET Delay 20 ns
MR Pullup Resistance Pull up to V
CC
12 20 28 kΩ
Note 1: Devices production tested at T
A
= +25°C. Over temperature limits are guaranteed by design.
Typical Operating Characteristics
(V
CC
= 5V, C
SRT
= 1500pF, T
A
= +25°C, unless otherwise noted.)
4
3
2
1
0
0312 456
SUPPLY CURRENT vs.
SUPPLY VOLTAGE
MAX6412-20 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (μA)
T
A
= +125°C
T
A
= +25°C
T
A
= -40°C
0
1.0
0.5
2.0
1.5
3.0
2.5
3.5
-50 0 25-25 50 75 100 125
SUPPLY CURRENT vs.
TEMPERATURE
MAX6412-20 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 1.8V
V
CC
= 1V
0.1
1
100
10
1000
10,000
0.001 0.10.01 1 10
100
1000
RESET TIMEOUT PERIOD vs. C
SRT
MAX6412-20 toc03
C
SRT
(nF)
RESET TIMEOUT PERIOD (ms)