Datasheet
MAX691A/MAX693A/MAX800L/MAX800M
Microprocessor Supervisory Circuits
6 _______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
20
0
0
BATTERY CURRENT
vs. INPUT SUPPLY VOLTAGE
16
MAX691A TOC-10
V
CC
(V)
I
BATT
(µA)
3
8
4
12 5
12
4
VBATT = 2.8V
I
OUT
= 0A
100
0.1
WATCHDOG AND RESET TIMEOUT PERIOD
vs. OSC IN TIMING CAPACITOR (COSC)
10
MAX691A TOC-11
COSC (pF)
WATCHDOG AND RESET TIMEOUT PERIOD (sec)
100
1
10 1000
V
CC
= 5V
VBATT = 2.8V
LONG WATCHDOG
TIMEOUT PERIOD
SHORT WATCHDOG
TIMEOUT PERIOD
RESET ACTIVE
TIMEOUT PERIOD
0 300
CHIP-ENABLE PROPAGATION DELAY
vs. CE OUT LOAD CAPACITANCE
MAX691A TOC-12
C
LOAD
(pF)
PROPAGATION DELAY (ns)
150
8
0
50 100 250
16
20
4
12
200
V
CC
= 5V
CE IN = 0V TO 5V
DRIVER SOURCE
IMPEDANCE = 50Ω
1000
1
1
V
CC
to V
OUT
vs. OUTPUT CURRENT
(NORMAL OPERATING MODE)
100
MAX691A TOC-13
I
OUT
(mA)
V
CC
to V
OUT
(mV)
100
10
10 1000
V
CC
= 4.5V
VBATT = 0V
SLOPE = 0.8Ω
1000
1
VBATT to V
OUT
vs. OUTPUT CURRENT
(BATTERY-BACKUP MODE)
100
MAX691A TOC-14
I
OUT
(mA)
VBATT to V
OUT
(mV)
10
10
1 100
V
CC
= 0V
VBATT = 4.5V
SLOPE = 8Ω
LO
V
CC
to LOW LINE
AND CE OUT DELAY
MAX691A TOC-15
LOW LINE
5V
V
CC
RESET
THRESHOLD
LO
HI
HI
HI
LO
CE OUT
RESET
12µs
800ns
80µs