MAX6323/MAX6324
µP Supervisory Circuits with Windowed
(Min/Max) Watchdog and Manual Reset
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= full range, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
CC
= 3V, 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 +6.0V
MR, RESET (MAX6323), WDI................-0.3V to (V
CC
+ 0.3V)
WDPO, RESET (MAX6324) ..............................-0.3V to +6.0V
Input Current, V
CC
, WDI, MR ..............................................20mA
Output Current, RESET, WDPO ..........................................20mA
Rate of Rise, V
CC
............................................................100V/µs
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C)..........696mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)
Lead(Pb)-Free ............................................................+260°C
Containing Lead.........................................................+240°C
PARAMETER SYMBOL MIN TYP MAX UNITS
4.25 4.38 4.50
4.50 4.63 4.75
Supply Current I
CC
27 57
µA
Operating Voltage Range 1.2 5.5V
CC
V
V
CC
= 5.5V
V
CC
= 2.5V or 3.3V 23 45
µA1
V
RESET
= V
WDPO
= +5.5V, RESET, WDPO
deasserted
I
LKG
WDPO, RESET Output Leakage
V
V
CC
- 1.5
I
SOURCE
= 800µA, V
CC
= 4.75V, RESET
deasserted, (MAX632_ _UT44, MAX632_ _UT46)
V
OH
RESET Output Voltage
(MAX6323)
0.8 x V
CC
I
SOURCE
= 500µA, V
CC
= 3.15V, RESET
deasserted (MAX632_ _UT23, MAX632_ _UT26,
MAX632_ _UT29, MAX632_ _UT31)
V
0.4
I
SINK
= 100µA, V
CC
> 1.2V, RESET asserted
V
OL
WDPO, RESET Output Voltage
0.4
I
SINK
= 3.2mA, V
CC
= 4.25V (MAX632_ _UT44,
MAX632_ _UT46)
0.4
I
SINK
= 1.2mA, V
CC
= 2.25V (MAX632_ _UT23,
MAX632_ _UT26, MAX632_ _UT29,
MAX632_ _UT31)
µs2010mV/ms, V
TH
+100mV to V
TH
- 100mV
V
CC
to RESET Delay
ms100 180 280
RESET deasserted
t
RP
Reset Timeout Delay
V
2.25 2.32 2.38
CONDITIONS
MAX632_ _UT23
V
TH
Reset Threshold Voltage
MAX632_ _UT44
MAX632_ _UT46
No load, RESET
deasserted
2.55 2.63 2.70MAX632_ _UT26
2.85 2.93 3.00MAX632_ _UT29
3.00 3.08 3.15MAX632_ _UT31