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MAX801NCSA+

P1-P3P4-P6P7-P9P10-P12
40
-55
-15
65
V
CC
SUPPLY CURRENT vs. TEMPERATURE
(NORMAL OPERATING MODE)
50
MAX801/808-01
TEMPERATURE (°C)
V
CC
SUPPLY CURRENT (μA)
25
105
-35 45 1255
85
70
60
45
55
75
65
MAX808
MAX801
3.0
2.5
2.0
1.5
1.0
0.5
0
-60 -20 60 140
BATTERY SUPPLY CURRENT vs.
TEMPERATURE (BATTERY-BACKUP MODE)
MAX801/808-02
TEMPERATURE (°C)
BATTERY SUPPLY CURRENT (μA)
20 100-40 40 120080
6
5
4
3
2
1
0
-60 -20 60 140
MAX808
CHIP-ENABLE PROPAGATION DELAY
vs. TEMPERATURE
MAX801/808-03
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
20 100-40 40 120080
MAX801L/M/N, MAX808L/M/N
8-Pin µP Supervisory Circuits
with ±1.5% Reset Accuracy
4 _______________________________________________________________________________________
Note 1: Either V
CC
or V
BATT
can go to 0V if the other is greater than 2V.
Note 2: The supply current drawn by the MAX80_ from the battery (excluding I
OUT
) typically goes to 15µA when (V
BATT
- 0.1V) <
V
CC
< V
BATT
. In most applications, this is a brief period as V
CC
falls through this region (see Typical Operating
Characteristics).
Note 3: “+” = battery-discharging current, “-” = battery-charging current.
Note 4: WDI is internally connected to a voltage divider between V
CC
and GND. If unconnected, WDI is typically driven to 1.8V,
disabling the watchdog function.
Note 5: The chip-enable resistance is tested with V
CE IN
= V
CC
/ 2 and I
CE IN
= 1mA.
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.
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 4.6V to 5.5V for the MAX80_L, V
CC
= 4.5V to 5.5V for the MAX80_N, V
CC
= 4.35V to 5.5V for the MAX80_M; V
BATT
= 2.8V;
T
A
= T
MIN
to T
MAX
. Typical values are at V
CC
= 5V and T
A
= +25°C, unless otherwise noted.)
CONDITIONS
Enabled mode, V
CC
= V
RST
(max) Ω75 150
CE IN to CE OUT
Resistance (Note 5)
UNITSMIN TYP MAXSYMBOLPARAMETER
V
CC
= 4.25V, CE OUT = 0V
mA15
CE OUT Short-Circuit
Current (RESET Active)
V
CC
= 5V, C
LOAD
= 50pF,
50Ω source-impedance driver
ns38
CE IN to CE OUT
Propagation Delay (Note 6)
V
CC
= 4.25V, I
OUT
= 2mA
V
3.5
CE OUT Output Voltage
High (RESET Active)
V
CC
falling, CE IN = 0V
µs18
RESET to CE OUT Delay
(Note 7)
V
CC
= 4.25V ±0.00002 ±1 µA
CE IN Leakage Current
V
CC
= 0V, I
OUT
= 10µA V
BATT
- 0.1 V
BATT
CHIP-ENABLE GATING (MAX808)CHIP-ENABLE GATING (MAX808)
__________________________________________Typical Operating Characteristics
(V
CC
= 5V, V
BATT
= 2.8V, no load, T
A
= +25°C, unless otherwise noted.)
MAX801L/M/N, MAX808L/M/N
8-Pin µP Supervisory Circuits
with ±1.5% Reset Accuracy
_______________________________________________________________________________________ 5
0
50Ω DRIVER
2
4
6
8
0 50 100
MAX808
CHIP-ENABLE PROPAGATION DELAY
vs. CE OUT LOAD CAPACITANCE
MAX801/808-04
C
LOAD
(pF)
PROPAGATION DELAY (ns)
4.70
4.65
4.60
4.55
4.50
4.45
4.40
-60 -20 60 140
RESET THRESHOLD
vs. TEMPERATURE
MAX801/808-07
TEMPERATURE (°C)
RESET THRESHOLD (V)
20 100-40 40 120080
MAX80_L
MAX80_N
MAX80_M
30
5
-60 -20 60 140
BATT
to OUT ON-RESISTANCE
vs. TEMPERATURE
10
25
MAX801/808-05
TEMPERATURE (°C)
V
BATT
TO V
OUT
ON-RESISTANCE (Ω)
20 100-40 40 120080
20
15
V
BATT
= 2.0V
V
BATT
= 2.8V
V
BATT
= 4.5V
V
CC
= 0V
I
OUT
= 10mA
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
-60 -20 60 140
V
CC
to OUT ON-RESISTANCE
vs. TEMPERATURE
MAX801/808-06
TEMPERATURE (°C)
V
CC
TO V
OUT
ON-RESISTANCE (Ω)
20 100-40 40 120080
I
OUT
= 250mA
280
260
240
220
200
180
160
140
-60 -20 60 140
RESET TIMEOUT PERIOD
vs. TEMPERATURE (V
CC
RISING)
MAX801/808-08
TEMPERATURE (°C)
RESET TIMEOUT PERIOD (ms)
20 100-40 40 120080
0
10
20
30
40
50
60
70
80
-60 -20 60 140
LOWLINE to RESET THRESHOLD
vs. TEMPERATURE (V
CC
FALLING)
MAX801/808-09
TEMPERATURE (°C)
LOWLINE TO RESET THRESHOLD (mV)
20 100-40 40 120080
____________________________Typical Operating Characteristics (continued)
(V
CC
= 5V, V
BATT
= 2.8V, no load, T
A
= +25°C, unless otherwise noted.)
4.75
4.80
4.70
4.65
4.60
4.55
4.50
4.45
4.40
-60 -20 60 140
LOWLINE THRESHOLD
vs. TEMPERATURE (V
CC
RISING)
MAX801/808-10
TEMPERATURE (°C)
LOWLINE THRESHOLD (V)
20 100-40 40 120080
MAX80_L
MAX80_N
MAX80_M
0
5
10
15
20
25
30
35
40
-60 -20 60 140
LOWLINE COMPARATOR PROPAGATION
DELAY vs. TEMPERATURE (V
CC
FALLING)
MAX801/808-11
TEMPERATURE (°C)
PROPAGATION DELAY (µs)
20 100-40 40 120080
V
CC
FALLING AT 1mV/µs
0
5
10
15
20
25
30
35
40
-60 -20 60 140
RESET COMPARATOR PROPAGATION
DELAY vs. TEMPERATURE (V
CC
FALLING)
MAX801/808-12
TEMPERATURE (°C)
PROPAGATION DELAY (µs)
20 100-40 40 120080
V
CC
FALLING AT 1mV/µs
MAX801L/M/N, MAX808L/M/N
8-Pin µP Supervisory Circuits
with ±1.5% Reset Accuracy
6 _______________________________________________________________________________________
0
2
4
6
8
10
12
14
16
2.5 2.6 2.7 2.8 2.9 3.0
BATTERY CURRENT
vs. INPUT SUPPLY VOLTAGE
MAX801/808-13
V
CC
(V)
BATTERY CURRENT (µA)
1000
100
10
1 10 100
BATT
to OUT VOLTAGE vs.
OUTPUT CURRENT
MAX801/808-14
I
OUT
(mA)
V
BATT
TO V
OUT
VOLTAGE (mV)
V
CC
= 0V
SLOPE = 12Ω
1000
100
10
1
1 10010 1000
MAXIMUM TRANSIENT DURATION vs.
RESET THRESHOLD OVERDRIVE
MAX801/808-16
RESET THRESHOLD OVERDRIVE (mV)
MAXIMUM TRANSIENT DURATION (µs)
RESET OCCURS
____________________________Typical Operating Characteristics (continued)
(V
CC
= 5V, V
BATT
= 2.8V, no load, T
A
= +25°C, unless otherwise noted.)
______________________________________________________________Pin Description
RESET
LOWLINE
V
CC
Active-Low Reset Output. RESET is triggered and stays low when V
CC
is below the reset
threshold (or during a watchdog timeout for the MAX801). It remains low 200ms after
V
CC
rises above the reset threshold (or 200ms after the watchdog timeout occurs).
RESET has a strong pull-down but a relatively weak pull-up, and can be wire-OR con-
nected to logic gates. Valid for V
CC
≥ 1V. RESET swings between V
CC
and GND.
33
NAME
Low-Line Comparator Output. This CMOS-logic output goes low when V
CC
falls to 52mV
above the reset threshold. Use LOWLINE to generate an NMI, initiating an orderly shut-
down routine when V
CC
is falling. LOWLINE swings between V
CC
and GND.
22
Input Supply Voltage, nominally +5V. Bypass with a 0.1µF capacitor to GND.11
MAX801 MAX808
FUNCTION
PIN
GND Ground44
P1-P3P4-P6P7-P9P10-P12

MAX801NCSA+

Mfr. #:
Buy MAX801NCSA+
Manufacturer:
Maxim Integrated
Description:
Supervisory Circuits 8-Pim uPower Supervisor
Lifecycle:
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