MAX691A/MAX693A/
MAX800L/MAX800M
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
Microprocessor Supervisory Circuits
WATCHDOG AND RESET TIMEOUT PERIOD (sec)
MAX691A toc11
MAX691A toc10
I
BATT
(µA)
12
8
4
0
10
RESET ACTIVE
TIMEOUT PERIOD
PROPAGATION DELAY (ns)
16
VBATT = 2.8V
I
OUT
= 0A
V
CC
= 5V
VBATT = 2.8V
LONG WATCHDOG
TIMEOUT PERIOD
16
12
8
4
0
V
CC
= 5V
CE
IN = 0V TO 5V
DRIVER SOURCE
1
SHORT WATCHDOG
TIMEOUT PERIOD
0.1
0
1
2
V
CC
(V)
3
4
5
10
100
COSC (pF)
1000
0
50
100
150
C
LOAD
(pF)
200
250
300
MAX691A toc13
MAX691A toc14
V
CC
= 4.5V
VBATT = 0V
V
CC
= 0V
VBATT = 4.5V
5V
V
CC
RESET
THRESHOLD
LOW LINE
LO
HI
80ms
VBATT to V
OUT
(mV)
V
CC
TO V
OUT
(mV)
100
100
10
SLOPE = 0.8Ω
10
SLOPE = 8Ω
RESET
LO
HI
CE
OUT
12µs
HI
800ns
1
1
10
I
OUT
(mA)
100
1000
1
1
10
I
OUT
(mA)
100
LO
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6
MAX691A toc15
1000
V
CC
TO V
OUT
vs. OUTPUT CURRENT
(NORMAL OPERATING MODE)
1000
VBATT TO V
OUT
vs. OUTPUT CURRENT
(BATTERY-BACKUP MODE)
V
CC
TO
LOW LINE
AND
CE
OUT DELAY
MAX691A toc12
20
BATTERY CURRENT
vs. INPUT SUPPLY VOLTAGE
100
WATCHDOG AND RESET TIMEOUT PERIOD
vs. OSC IN TIMING CAPACITOR (COSC)
20
CHIP-ENABLE PROPAGATION DELAY
vs.
CE
OUT LOAD CAPACITANCE
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