MAX6886 データシートの表示（PDF） - Maxim Integrated
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MAX6886 Datasheet PDF : 13 Pages
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Pin-Selectable, Hex Power-Supply
Supervisory Circuit
ELECTRICAL CHARACTERISTICS (continued)
(VIN1–VIN4 or VCC = 2.7V to 5.8V, WDI = GND, TH0–TH4 = MARGIN = MR = DBP, TA = -40°C to +85°C, unless otherwise noted.
Typical values are at TA = +25°C.) (Notes 1, 2)
PARAMETER
MR, MARGIN, TH0–TH4, WDI
Input Voltage
MR Input Pulse Width
MR Glitch Rejection
MR to RESET Delay
MR to Internal DBP Pullup
Current
SYMBOL
VIL
VIH
tMR
CONDITIONS
tD-MR
IMR
VMR = 1.4V
MIN TYP MAX UNITS
0.6
V
1.4
1
µs
100
ns
200
ns
5
10
15
µA
MARGIN to Internal DBP Pullup
Current
IMARGIN VMARGIN = 1.4V
5
10
15
µA
TH0–TH4 Input Current
-100
+100
nA
WDI Pulldown Current
IWDI
VWDI = 0.6V
5
10
15
µA
WDI Input Pulse Width
Watchdog Default Timeout Period
tWDI
tWD
VSWT = VCC
Initial mode
Normal mode
50
ns
92.16 102.4 112.64
s
1.44 1.6 1.76
Watchdog Adjustable Timeout
Period
tWD-ADJ CSWT = 0.33µF
Initial mode
Normal mode
53.7 82.5 111.9
s
0.93 1.43 1.94
SWT Adjustable Timeout Current
ISWT SWT = GND
180
230
280
nA
SWT Default Timeout Threshold
VSWT-DEF
VSWT ≥ VSWT-DEF, selects watchdog default
timeout
1.1
1.25
1.5
V
SWT Adjustable Timeout
Threshold
VSWT-ADJ (Note 4)
0.95 1.00 1.05
V
SWT Adjustable Timeout
Discharge Threshold
SWT Adjustable Timeout Output-
Low Discharge Current
VSWT-DIS (Note 5)
ISWT-DIS VSWT = 0.3V
100
mV
0.7
mA
Note 1: Device may be supplied from IN1–IN4 or VCC.
Note 2: 100% production tested at TA = +25°C and TA = +85°C. Specifications at TA = -40°C are guaranteed by design.
Note 3: The internal supply voltage, measured at VCC, equals the maximum of IN1–IN4.
Note 4: External capacitor is charged by IS_T when VS_T-DIS < VS_T < VS_T-ADJ.
Note 5: External capacitor is discharged by IS_T-DIS down to VS_T-DIS after VS_T reaches VS_T-ADJ.
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