MAX6892/MAX6893/MAX6894
Pin-Selectable, Octal/Hex/Quad, Power-Supply
Sequencers/Supervisors
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
IN1
= V
IN6
–V
IN8
= V
GND
, V
IN2
–V
IN5
= 2.7V to 5.5V, WDI = ENABLE = GND, TH0–TH4 = MARGIN = MR = DBP, T
A
= -40°C to
+85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1, 2)
SYMBOL
MIN TYP MAX
TH0–TH4 Input Current -1 +1 µA
WDI Pulldown Current I
WDI
V
WDI
= 0.6V 5 10 15 µA
WDI Input Pulse Width 50 ns
Initial mode
92.16 102.4 112.64
Watchdog Default Timeout Period
t
WD
V
SWT
= V
CC
Normal mode
1.44
1.76
53.7 82.5 111.9
Watchdog Adjustable Timeout
Period
t
WD-ADJ
C
SWT
= 0.33µF
Normal mode
0.93 1.43 1.94
SWT Adjustable Timeout Current
180 230 280
nA
SWT Default Timeout Threshold
V
SWT-DEF
V
SWT
≥ V
SWT-DEF
, selects watchdog default
timeout period
1.1
1.25
1.5 V
SWT Adjustable Timeout
Threshold
V
SWT-ADJ
0.95
1.05
V
SWT Adjustable Timeout
Discharge Threshold
V
SWT-DIS
100
mV
SWT Adjustable Timeout Output
Low Discharge Current
I
SWT-DIS
Note 1: 100% production tested at T
A
= +25°C and T
A
= +85°C. Specifications at T
A
= -40°C are guaranteed by design.
Note 2: Device may be supplied from any one of IN2–IN5, or V
CC
.
Note 3: The internal supply voltage, measured at V
CC
, equals the maximum of IN2–IN5.
Note 4: External capacitor is charged by I
S_T
when V
S_T-DIS
< V
S_T
< V
S_T-ADJ
.
Note 5: External capacitor is discharged by I
S_T-DIS
down to V
S_T-DIS
after V
S_T
reaches V
S_T-ADJ
.
