MAX791 Maxim, MAX791 Datasheet - Page 3

• Manufacturer Part Number: MAX791
• Description: Microprocessor Supervisory Circuit
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
RESET, LOW-LINE AND WATCHDOG TIMER
BATT ON Output
Low Voltage
BATT ON Output
Short-Circuit Current
–
R
–
R
–
L
Threshold Voltage
V
V
–
R
Watchdog Timeout Period
Minimum Watchdog
Timeout Period
Minimum Watchdog Input
Pulse Width
–
W
–
W
–
R
–
R
Short-Circuit Current
–
L
–
L
Short-Circuit Current
–
W
–
W
–
W
–
W
Short-Circuit Current
—
—
—
—
—
—
—
—
CC
—
—
—
—
—
—
O
O
O
E
E
CC
CC
E
E
E
—
—
—
—
—
—
D
D
—
—
D
D
D
D
—
—
—
—
—
—
S
S
S
S
S
W
W
W
—
—
—
—
—
P
P
O
O
P
P
— —
—
—
— —
— —
—
—
= 4.75V to 5.5V, VBATT = 2.8V, T
E
E
-to-
-to-
E
E
E
–
–
—
—
—
—
—
L
O
O
L
L
O
O
—
—
—
T
T
T
–
–
T
T
–
–
–
–
–
–
–
—
—
—
Output Voltage
Output Short-Circuit Current
I
I
I
-to-
N
N
N
—
–
R
–
L
Pulse Width
—
—
Output Voltage
Output
Threshold Voltage
Threshold Hysteresis
—
Active Timeout Period
Output Voltage
Output
—
E
E
E
O
–
–
–
E
—
—
PARAMETER
-to-
–
W
S
W
—
Output Voltage
Output
—
— —
E
—
D
—
L
—
T
–
–
R
—
—
I
O
N
–
E
—
—
Delay
E
S
–
Delay
—
E
—
Delay
–
T
_______________________________________________________________________________________
Microprocessor Supervisory Circuit
I
I
Sink current
Source current
Power down
Power down
Power up
SWT connected to V
4.7nF capacitor connected from SWT to GND
V
MAX791C, I
MAX791E/M, I
I
I
Output source current
I
I
Output source current
I
I
Output source current
I
I
Output source current
A
SINK
SINK
SINK
SOURCE
SINK
SOURCE
SINK
SOURCE
SINK
SOURCE
IL
= T
= 0.8V, V
= 3.2mA
= 25mA
= 3.2mA, V
= 3.2mA, V
= 3.2mA
= 3.2mA
MIN
= 1.6mA, V
= 1µA, V
= 500µA, V
= 1mA
to T
SINK
IH
MAX
SINK
= 0.75 x V
= 50µA, V
CC
CC
CONDITIONS
, unless otherwise noted.)
CC
= 50µA, V
= 4.25V
= 4.25V
OUT
CC
CC
= 5V
= 5V
= 5V
CC
CC
CC
= 1.0V, V
= 1.2V, V
CC
CC
falling
falling
4.50
MIN
140
100
1.0
3.5
3.5
3.5
3.5
1
0.004
0.004
TYP
4.65
150
100
200
0.1
0.7
1.6
0.1
60
15
15
80
10
70
15
1
7
3
7
MAX
4.75
2.25
100
280
100
0.4
1.5
0.3
0.3
0.4
0.4
0.4
0.4
20
10
20
UNITS
sec
mA
mV
mV
mA
mA
mA
ms
ms
ms
µA
µA
µs
µs
ns
ns
ns
V
V
V
V
V
V
3