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MAX817L Datasheet(PDF) 3 Page - Maxim Integrated Products

Part No. MAX817L
Description  5V Microprocessor Supervisory Circuits
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX817L Datasheet(HTML) 3 Page - Maxim Integrated Products

 
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ELECTRICAL CHARACTERISTICS (continued)
(VCC = +4.75V to +5.5V for MAX81_L, VCC = +4.5V to +5.5V for MAX81_M, VBATT = 2.8V, TA = TMIN to TMAX, unless otherwise
noted. Typical values are at TA = +25°C.)
+5V Microprocessor Supervisory Circuits
_______________________________________________________________________________________
3
V PFO = 0V
VPFI > 1.30V, ISOURCE = 40µA, VCC > 4.5V
MAX81_M
VPFI < 1.20V, ISINK = 3.2mA, VCC > 4.50V
MAX81_L
WDI = GND, time average
From VRST, VCC falling at 10V/ms
WDI = VCC, time average
VCC = 5V
MAX81_ _C, VCC = 1V, VCC falling,
VBATT = 0V, ISINK = 50µA
VCC > VRST(MAX), ISOURCE = 800µA
VCC < VRST(MIN), ISINK = 3.2mA
VIL = 0.4V, VIH = 0.8VCC
CONDITIONS
µA
250
500
PFO Short-Circuit Current
VCC - 1.5
VOH
PFO Output Voltage
V
0.4
VOL
nA
-25
0.01
25
IPFI
PFI Input Current
mV
4
PFI Input Hysteresis
V
1.20
1.25
1.30
VPFT
PFI Input Threshold
µA
-20
-15
WDI Input Current (Note 5)
120
160
V
3.5
VIH
WDI Input Threshold (Note 4)
0.8
VIL
ns
50
tWDI
WDI Pulse Width
V
4.25
4.40
4.50
VRST
Reset Threshold
4.50
4.65
4.75
sec
1.00
1.60
2.25
tWD
Watchdog Timeout Period
µs
100
VCC to RESET Delay
0.3
mV
25
Reset Threshold Hysteresis
ms
140
200
280
tRP
Reset Timeout Period
VCC - 1.5
VOH
0.4
VOL
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
MAX81_ _E, VCC = 1.2V, VCC falling,
VBATT = 0V, ISINK = 100µA
V
0.3
RESET Output Voltage
0.8
V
2.0
VIL
MR Input Threshold
µs
1
MR Pulse Width
VIH
ns
100
MR Pulse that Would Not Cause
a Reset
ns
120
MR to Reset Delay
k
45
63
85
MR Pull-Up Resistance
RESET AND WATCHDOG TIMER
POWER-FAIL COMPARATOR (MAX817/MAX819 only)
MANUAL RESET INPUT (MAX819 only)


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