MAX6302 Maxim, MAX6302 Datasheet - Page 3

• Manufacturer Part Number: MAX6302
• Description: +5V / Low-Power uP Supervisory Circuits with Adjustable Reset/Watchdog
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
Note 1: Reset is guaranteed valid from the selected reset threshold voltage down to the minimum V
Note 2: VDS = V
Note 3: Precision timing currents of 500nA are present at both the SRT and SWT pins. Timing capacitors connected to these nodes
Note 4: The sink/source is supplied through a resistor, and is proportional to V
10,000
(C
__________________________________________Typical Operating Characteristics
WATCHDOG TIMER
WDI, WDS Input Threshold
WDI Pulse Width
WDI, WDS Leakage Current
WDI Sink/Source Current
(Note 4)
Watchdog Timeout Period
(Note 3)
1000
CC
100
SWT
10
1
0
= +2V to +5.5V, T
0.001 0.01
= C
V
must have low leakage consistent with these currents to prevent timing errors.
CC
PARAMETER
SRT
= 5V
RESET TIMEOUT PERIOD
= 1500pF, T
CC
0.1
, WDI unconnected.
vs. C
C
_______________________________________________________________________________________
+5V, Low-Power µP Supervisory Circuits
SRT
A
1
(nF)
SRT
= T
A
MIN
10
= +25°C, unless otherwise noted.)
to T
100
SYMBOL
MAX
t
V
t
V
WD
1000
WP
IH
IL
, unless otherwise noted. Typical values are at V
with Adjustable Reset/Watchdog
10,000
V
V
Extended mode disabled
Extended mode enabled
WDS = GND, C
WDS = V
1000
CC
CC
100
10
1
0
= 4.5V to 5.5V
= 2V to 4.5V
0.001 0.01
WATCHDOG TIMEOUT PERIOD vs. C
V
CC
CC
= 5V
, C
SWT
SWT
EXTENDED-MODE
CONDITIONS
0.1
(WDS = V
= 1500pF
C
= 1500pF
SWT
1
(nF)
CC
10
)
CC
100
(Figure 8). At V
SWT
1000
CC
10,000
= +5V and T
1000
100
0.1
10
0.7V
1
CC
0.001 0.01
MIN
2.8
1.4
30
60
WATCHDOG TIMEOUT PERIOD vs. C
CC
V
CC
= 2V, it is typically ±24µA.
CC
.
= 5V
A
= +25°C.)
TYP
±70
4.0
2.0
NORMAL-MODE
0.1
(WDS = GND)
C
SWT
0.3V
1
MAX
(nF)
5.2
2.6
±1
CC
10
UNITS
100
sec
ms
µA
µA
ns
V
SWT
1000
3