MAX808N Maxim Integrated Products, MAX808N Datasheet - Page 4

• Manufacturer Part Number: MAX808N
• Description: (MAX801x / MAX808x) Supervisory Circuits
• Manufacturer: Maxim Integrated Products

8-Pin µP Supervisory Circuits
with ±1.5% Reset Accuracy
ELECTRICAL CHARACTERISTICS (continued)
(V
T
Note 1: Either V
Note 2: The supply current drawn by the MAX80_ from the battery (excluding I
Note 3: “+” = battery-discharging current, “-” = battery-charging current.
Note 4: WDI is internally connected to a voltage divider between V
Note 5: The chip-enable resistance is tested with V
Note 6: The chip-enable propagation delay is measured from the 50% point at CE IN to the 50% point at CE OUT.
Note 7: If CE IN goes high, CE OUT goes high immediately and stays high until reset is deasserted and CE IN is low.
4
(V
__________________________________________Typical Operating Characteristics
A
CE IN Leakage Current
CE IN to CE OUT
Resistance (Note 5)
CE OUT Short-Circuit
Current (RESET Active)
CE IN to CE OUT
Propagation Delay (Note 6)
CE OUT Output Voltage
High (RESET Active)
RESET to CE OUT Delay
(Note 7)
CHIP-ENABLE GATING (MAX808)
CHIP-ENABLE GATING (MAX808)
CC
CC
= T
_______________________________________________________________________________________
75
70
65
60
55
50
45
40
= 4.6V to 5.5V for the MAX80_L, V
= 5V, V
MIN
V
-55
PARAMETER
CC
V
Characteristics ).
disabling the watchdog function.
-35
CC
SUPPLY CURRENT vs. TEMPERATURE
to T
(NORMAL OPERATING MODE)
BATT
< V
-15
MAX
CC
TEMPERATURE (°C)
BATT
. Typical values are at V
= 2.8V, no load, T
5
or V
25
. In most applications, this is a brief period as V
BATT
45
MAX801
MAX808
65
can go to 0V if the other is greater than 2V.
SYMBOL
85
105
A
= +25°C, unless otherwise noted.)
125
CC
V
Enabled mode, V
V
V
50Ω source-impedance driver
V
V
V
CC
CC
CC
CC
CC
CC
CC
= 4.5V to 5.5V for the MAX80_N, V
= 5V and T
= 4.25V
= 4.25V, CE OUT = 0V
= 5V, C
= 4.25V, I
= 0V, I
falling, CE IN = 0V
3.0
2.5
2.0
1.5
1.0
0.5
0
CE IN
TEMPERATURE (BATTERY-BACKUP MODE)
-60
OUT
LOAD
-40
CONDITIONS
OUT
A
BATTERY SUPPLY CURRENT vs.
= 10µA
= V
= +25°C, unless otherwise noted.)
-20
CC
= 50pF,
= 2mA
CC
= V
TEMPERATURE (°C)
0
/ 2 and I
20
RST
CC
40
CC
(max)
and GND. If unconnected, WDI is typically driven to 1.8V,
60
falls through this region (see Typical Operating
CE IN
80
100
= 1mA.
OUT
CC
120
) typically goes to 15µA when (V
= 4.35V to 5.5V for the MAX80_M; V
140
V
BATT
MIN
3.5
- 0.1
6
5
4
3
2
1
0
-60
CHIP-ENABLE PROPAGATION DELAY
-40
±0.00002
V
-20
TYP
BATT
75
15
18
3
vs. TEMPERATURE
TEMPERATURE (°C)
0
20
MAX808
40
BATT
60
MAX
150
±1
8
80
BATT
- 0.1V) <
100
UNITS
= 2.8V;
120
mA
µA
ns
µs
Ω
V
140