Microprocessor Supervisory Circuits
ELECTRICAL CHARACTERISTICS (continued)
(MAX691A, MAX800L: V
CC
= +4.75V to +5.5V, MAX693A, MAX800M: V
CC
= +4.5V to +5.5V, VBATT = 2.8V, T
A
= T
MIN
to T
MAX
,
unless otherwise noted.)
PARAMETER
Battery Switchover
Hysteresis
BATT ON Output
Low Voltage
BATT ON Output
Short-Circuit Current
I
SINK
= 3.2mA
I
SINK
= 25mA
Sink current
Source current
CONDITIONS
MIN
TYP
60
0.1
0.7
60
15
4.65
4.40
0.4
1.5
100
4.75
4.50
4.70
4.45
15
Power-down
80
800
140
200
2048
1.0
70
1.6
100
4096
1024
2.25
140
280
mV
µs
ns
ms
Clock
Cycles
sec
ms
Clock
Cycles
ns
0.004
0.1
3.5
7
0.1
0.4
0.4
3.5
1
15
100
0.4
3.5
3
0.75 x V
CC
0.8
-50
-10
20
50
10
20
mA
V
V
µA
V
mA
V
µA
3
0.3
0.4
V
MAX
UNITS
mV
V
mA
µA
MAX691A/MAX693A/MAX800L/MAX800M
1
4.50
4.25
4.55
4.30
RESET AND WATCHDOG TIMER
MAX691A, MAX800L
Reset Threshold Voltage
MAX693A, MAX800M
MAX800L, T
A
= +25°C, V
CC
falling
MAX800M, T
A
= +25°C, V
CC
falling
Reset Threshold Hysteresis
V
CC
to RESET Delay
LOW LINE-to-RESET
Delay
Reset Active Timeout Period,
Power-up
Internal Oscillator
Reset Active Timeout Period,
Power-up
External Clock (Note 4)
Watchdog Timeout Period,
Internal Oscillator
Watchdog Timeout Period,
External Clock (Note 4)
Minimum Watchdog Input
Pulse Width
RESET
Output Voltage
Long period
Short period
Long period
Short period
V
IL
= 0.8V, V
IH
= 0.75 x V
CC
I
SINK
= 50µA, V
CC
= 1V, VBATT = 0V, V
CC
falling
I
SINK
= 3.2mA, V
CC
= 4.25V
I
SOURCE
= 1.6mA, V
CC
= 5V
100
V
–
RESET
Output Short-Circuit
Output source current
Current
RESET Output Voltage Low
I
SINK
= 3.2mA
(Note 5)
LOW LINE
Output Voltage
LOW LINE
Output
Short-Circuit Current
WDO
Output Voltage
WDO
Output
Short-Circuit Current
WDI Threshold Voltage
(Note 6)
WDI Input 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
V
IH
V
IL
WDI = 0V
WDI = V
OUT
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
