Datasheet
MAX6841–MAX6845
Ultra-Low-Voltage µP Reset Circuits and
Voltage Detectors
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +0.55V to +1.8V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
Terminal Voltage (with respect to GND)
V
CC
.......................................................................-0.3V to +6V
MR, RESET IN, RESET (open-drain).........................-0.3V to +6V
Push-Pull RESET and RESET .....................-0.3V to (V
CC
+ 0.3V)
Input Current (all pins) ........................................................20mA
Output Current (RESET, RESET).........................................20mA
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
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
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
MAX6843/MAX6845
0.55 1.80
Supply Voltage Range V
CC
MAX6841/MAX6842/MAX6844 (Note 2)
0.75 1.80
V
V
CC
= 0.9V, no load, reset not asserted 5.7 20
V
CC
= 1.5V, no load, reset not asserted 7.3 20
Supply Current I
CC
V
CC
= 1.8V, no load, reset not asserted 8.1 20
µA
I
1.350 1.388 1.425
H
1.275 1.313 1.350
G
1.080 1.110 1.140
F
1.020 1.050 1.080
E
0.810 0.833 0.855
Reset Threshold
(V
CC
Falling)
V
TH
D, T
A
= 0°C to +85°C
0.765 0.788 0.810
V
RESET IN Threshold V
RSTIN
MAX6843/MAX6844/MAX6845 (Note 3)
181.2 187.4 191.5
mV
RESET IN Leakage Current I
RSTIN
-25
+25
nA
Reset Threshold Hysteresis V
HYS
0.75
%V
TH
V
CC
or RESET IN to Reset Delay
V
CC
falling, step signal from (V
TH
+ 10%)
to (V
TH
- 10%) within 1µs
150
µs
D0 (voltage detector)
0.15
D1 1 1.5 2
D2 20 30 40
D3
140 210
280
Reset Active Timeout Period t
RP
D4
1120 1680 2240
ms
V
IL
0.3 × V
CC
MR Input Voltage (Note 3)
V
IH
0.7 × V
CC
V
MR Minimum Input Pulse Width MR driven from V
CC
to 0 (Note 3) 1 µs
MR Glitch Rejection MR driven from V
CC
to 0 (Note 3)
150
ns
MR to Reset Delay MR driven from V
CC
to 0 (Note 3)
500
ns
MR Pullup Resistance to V
CC
10 20 26 kΩ