Microprocessor Supervisory Circuit
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 4.75V to 5.5V, VBATT = 2.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
BATT ON Output
Low Voltage
BATT ON Output
Short-Circuit Current
I
SINK
= 3.2mA
I
SINK
= 25mA
Sink current
Source current
1
4.50
CONDITIONS
MIN
TYP
0.1
0.7
60
15
4.65
15
150
100
80
140
1.0
200
1.6
10
100
1
70
MAX791C, I
SINK
= 50µA, V
CC
= 1.0V, V
CC
falling
–——
— —–
RESET Output Voltage
–——
— —–
RESET Output
Short-Circuit Current
– ——— –
— ——
LOW LINE Output Voltage
– ——— –
— ——
LOW LINE Output
Short-Circuit Current
–— –
—
WDO Output Voltage
–— –
—
WDO Output Short-Circuit Current
–— —
—–
WDPO Output Voltage
–— —
—–
WDPO Output
Short-Circuit Current
MAX791E/M, I
SINK
= 50µA, V
CC
= 1.2V, V
CC
falling
I
SINK
= 3.2mA, V
CC
= 4.25V
I
SOURCE
= 1.6mA, V
CC
= 5V
Output source current
I
SINK
= 3.2mA, V
CC
= 4.25V
I
SOURCE
= 1µA, V
CC
= 5V
Output source current
I
SINK
= 3.2mA
I
SOURCE
= 500µA, V
CC
= 5V
Output source current
I
SINK
= 3.2mA
I
SOURCE
= 1mA
Output source current
3.5
7
20
3.5
3
10
0.4
3.5
15
100
0.4
3.5
7
20
0.4
mA
V
µA
V
mA
V
mA
0.004
0.004
0.1
0.3
0.3
0.4
280
2.25
100
4.75
MAX
0.4
1.5
UNITS
V
mA
µA
V
mV
mV
µs
µs
ms
sec
ms
ns
ms
ns
ns
V
MAX791
RESET, LOW-LINE AND WATCHDOG TIMER
–——
— —–
RESET Threshold Voltage
–——
— —–
RESET Threshold Hysteresis
– ——— –
— ——
–——
— —–
LOW LINE -to-RESET
Threshold Voltage
–——
— —–
V
CC
-to-RESET Delay
Power down
– ——— –
— ——
V
CC
-to-LOW LINE Delay
Power down
–——
— —–
RESET Active Timeout Period
Power up
Watchdog Timeout Period
Minimum Watchdog
Timeout Period
Minimum Watchdog Input
Pulse Width
–— —
—–
WDPO Pulse Width
–— —
—–
–— –
—
WDPO -to-WDO Delay
SWT connected to V
OUT
4.7nF capacitor connected from SWT to GND
V
IL
= 0.8V, V
IH
= 0.75 x V
CC
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
