MAX6316–MAX6322
5-Pin μP Supervisory Circuits with
Watchdog and Manual Reset
Electrical Characteristics (continued)
(V
= 2.5V to 5.5V, T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
CC
A
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
BIDIRECTIONAL RESET OUTPUT (MAX6316M/MAX6318MH/MAX6319MH)
Transitional Flip-Flop Setup Time
t
(Note 4)
400
ns
S
V
V
V
V
V
V
= 3.0V, C = 120pF
333
333
666
666
CC
CC
CC
CC
CC
CC
L
= 5.0V, C = 200pF
RESET Output Rise Time
L
t
ns
R
(Note 5)
= 3.0V, C = 250pF
L
= 5.0V, C = 400pF
L
Active Pullup Enable Threshold
V
= 5.0V
= 5.0V
0.4
0.65
20
V
PTH
RESET Active Pullup Current
mA
T
T
= -40°C to +85°C
= -40°C to +125°C
4.2
3.6
4.7
4.7
5.2
5.8
A
A
RESET Pullup Resistance
kΩ
OPEN-DRAIN RESET OUTPUT (MAX6320P/MAX6321HP/MAX6322HP)
V
V
V
V
> 1.0V, I
> 1.2V, I
> 2.7V, I
> 4.5V, I
= 50µA
0.3
0.3
0.3
0.4
CC
CC
CC
CC
SINK
SINK
SINK
SINK
= 100µA
= 1.2mA
= 3.2mA
RESET Output Voltage
V
V
OL
Open-Drain Reset Output
Leakage Current
I
1.0
µA
ms
LKG
WATCHDOG INPUT (MAX6316/MAX6317H/MAX6318_H/MAX6320P/MAX6321HP)
MAX63_ _ _W-T
4.3
71
6.3
102
1.6
9.3
153
2.4
MAX63_ _ _X-T
Watchdog Timeout Period
t
WD
MAX63_ _ _Y-T
MAX63_ _ _Z-T
1.12
17.9
50
s
ns
V
25.6
38.4
WDI Pulse Width
t
V
= 0.3 x V
V
= 0.7 x V
WDI
IL
CC, IH CC
V
0.3 x V
CC
IL
WDI Input Threshold
(Note 6)
WDI = V , time average
V
0.7 x V
CC
IH
120
-15
160
WDI Input Current
(Note 7)
CC
I
µA
WDI
V
= 0V, time average
-20
0.8
WDI
MANUAL RESET INPUT (MAX6316_/MAX6317H/MAX6319_H/MAX6320P/MAX6322HP)
V
IL
V
V
> 4.0V
< 4.0V
TH
TH
V
2.0
IH
MR Input Threshold
V
V
0.3 x V
CC
IL
V
0.7 x V
IH
CC
T
T
= -40°C to +85°C
= -40°C to +125°C
1
A
A
MR Input Pulse Width
µs
1.5
MR Glitch Rejection
MR Pullup Resistance
MR to Reset Delay
100
52
ns
kΩ
ns
35
75
V
= 5V
230
CC
Note 4: This is the minimum time RESET must be held low by an external pulldown source to set the active pullup flip-flop.
Note 5: Measured from RESET V to (0.8 x V ), R = ∞.
OL
CC
LOAD
Note 6: WDI is internally serviced within the watchdog period if WDI is left unconnected.
Note 7: The WDI input current is specified as the average input current when the WDI input is driven high or low. The WDI input is
designed for a three-stated-output device with a 10μA maximum leakage current and capable of driving a maximum capaci-
tive load of 200pF. The three-state device must be able to source and sink at least 200μA when active.
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