MAX817 Maxim, MAX817 Datasheet - Page 3

• Manufacturer Part Number: MAX817
• Description: +5V Microprocessor Supervisory Circuits
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
noted. Typical values are at T
RESET AND WATCHDOG TIMER
POWER-FAIL COMPARATOR (MAX817/MAX819 only)
MANUAL RESET INPUT (MAX819 only)
Reset Threshold
Reset Threshold Hysteresis
Reset Timeout Period
RESET Output Voltage
V
Watchdog Timeout Period
WDI Pulse Width
WDI Input Threshold (Note 4)
WDI Input Current (Note 5)
PFI Input Threshold
PFI Input Hysteresis
PFI Input Current
PFO Output Voltage
PFO Short-Circuit Current
MR Input Threshold
MR Pulse Width
MR Pulse that Would Not Cause
a Reset
MR to Reset Delay
MR Pull-Up Resistance
CC
CC
= +4.75V to +5.5V for MAX81_L, V
to RESET Delay
PARAMETER
+5V Microprocessor Supervisory Circuits
_______________________________________________________________________________________
A
= +25°C.)
SYMBOL
V
V
V
t
V
V
V
t
V
I
V
t
WDI
V
V
WD
RST
PFI
RP
PFT
OH
OH
OL
OL
IH
IH
IL
IL
CC
= +4.5V to +5.5V for MAX81_M, V
MAX81_L
MAX81_M
V
V
MAX81_ _C, V
V
MAX81_ _E, V
V
From V
V
V
WDI = V
WDI = GND, time average
V
V
V
BATT
CC
CC
BATT
IL
CC
PFI
PFI
P FO
= 0.4V, V
> V
< V
= 5V
< 1.20V, I
> 1.30V, I
= 0V
= 0V, I
= 0V, I
RST
RST(MAX),
RST(MIN),
CC
, V
, time average
SINK
IH
SINK
CC
CC
CC
SINK
SOURCE
= 0.8V
CONDITIONS
falling at 10V/ms
= 1.2V, V
= 100µA
I
= 1V, V
I
= 50µA
SINK
SOURCE
= 3.2mA, V
CC
= 40µA, V
= 3.2mA
CC
CC
= 800µA
falling,
falling,
CC
CC
BATT
> 4.50V
> 4.5V
= 2.8V, T
V
V
A
CC
CC
4.50
4.25
1.00
1.20
MIN
140
3.5
-20
-25
0.8
= T
50
45
1
- 1.5
- 1.5
MIN
to T
TYP
4.65
4.40
1.60
1.25
0.01
100
120
250
100
120
200
-15
25
63
4
MAX
, unless otherwise
MAX
4.75
4.50
2.25
1.30
280
160
500
0.4
0.3
0.3
0.8
0.4
2.0
25
85
UNITS
sec
mV
ms
mV
µA
nA
µA
kΩ
µs
ns
µs
ns
ns
V
V
V
V
V
V
3