Datasheet
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
1 10010 1000
V
CC
to OUT VOLTAGE vs.
OUTPUT CURRENT
MAX801/808-15
I
OUT
(mA)
V
CC
TO V
OUT
VOLTAGE (mV)
SLOPE = 1.0Ω
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