MAX691 Maxim, MAX691 Datasheet - Page 3

• Manufacturer Part Number: MAX691
• Description: Microprocessor Supervisory Circuits
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(MAX691A, MAX800L: V
unless otherwise noted.)
RESET AND WATCHDOG TIMER
Battery Switchover
Hysteresis
BATT ON Output
Low Voltage
BATT ON Output
Short-Circuit Current
Reset Threshold Voltage
Reset Threshold Hysteresis
V
LOW LINE-to-RESET Delay
Reset Active Timeout Period,
Internal Oscillator
Reset Active Timeout Period,
External Clock (Note 4)
Watchdog Timeout Period,
Internal Oscillator
Watchdog Timeout Period,
External Clock (Note 4)
Minimum Watchdog Input
Pulse Width
RESET Output Voltage
–
RESET Output Short-Circuit
Current
RESET Output Voltage Low
(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
CC
to RESET Delay
PARAMETER
_______________________________________________________________________________________
CC
= +4.75V to +5.5V, MAX693A, MAX800M: V
I
I
Sink current
Source current
MAX691A, MAX800L
MAX693A, MAX800M
MAX800L, T
MAX800M, T
Power-down
Power-up
Power-up
Long period
Short period
Long period
Short period
V
I
I
I
Output source current
I
I
I
Output source current
I
I
Output source current
V
V
WDI = 0V
WDI = V
SINK
SINK
SINK
SINK
SOURCE
SINK
SINK
SOURCE
SINK
SOURCE
Microprocessor Supervisory Circuits
IL
IH
IL
= 0.8V, V
= 3.2mA
= 25mA
= 50µA, V
= 3.2mA, V
= 3.2mA
= 3.2mA, V
= 3.2mA
OUT
= 1.6mA, V
= 1µA, V
= 500µA, V
A
A
IH
= +25°C, V
= +25°C, V
= 0.75 x V
CC
CC
CC
CC
= 1V, VBATT = 0V, V
CONDITIONS
= 4.25V
= 4.25V
CC
CC
= 5V
= 5V
= 5V
CC
CC
CC
falling
falling
CC
falling
CC
= +4.5V to +5.5V, VBATT = 2.8V, T
0.75 x V
MIN
4.50
4.25
4.55
4.30
140
100
1.0
3.5
0.1
3.5
3.5
-50
70
1
1
CC
0.004
TYP
2048
4096
1024
4.65
4.40
800
200
100
0.1
0.7
1.6
0.1
0.4
-10
60
60
15
15
80
15
20
7
3
MAX
A
4.75
4.50
4.70
4.45
2.25
100
280
140
100
0.4
1.5
0.3
0.4
0.4
0.4
0.8
20
10
50
= T
MIN
UNITS
Cycles
Cycles
to T
Clock
Clock
mA
sec
mA
mA
mV
mV
µA
ms
ms
µA
µA
µs
ns
ns
V
V
V
V
V
V
V
MAX
3
,