MAX801 Просмотр технического описания (PDF) - Maxim Integrated
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MAX801 Datasheet PDF : 12 Pages
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8-Pin µP Supervisory Circuits
with ±1.5% Reset Accuracy
____________________________Typical Operating Characteristics (continued)
(VCC = 5V, VBATT = 2.8V, no load, TA = +25°C, unless otherwise noted.)
BATTERY CURRENT
vs. INPUT SUPPLY VOLTAGE
16
14
12
10
8
6
4
2
0
2.5
2.6
2.7
2.8 2.9
3.0
VCC (V)
VCC to OUT VOLTAGE vs.
OUTPUT CURRENT
1000
SLOPE = 1.0Ω
BATT to OUT VOLTAGE vs.
OUTPUT CURRENT
1000
VCC = 0V
SLOPE = 12Ω
100
10
1
10
100
IOUT (mA)
MAXIMUM TRANSIENT DURATION vs.
RESET THRESHOLD OVERDRIVE
1000
RESET OCCURS
100
100
10
10
1
1
10
100
1000
IOUT (mA)
1
1
10
100
1000
RESET THRESHOLD OVERDRIVE (mV)
______________________________________________________________Pin Description
PIN
MAX801 MAX808
1
1
2
2
3
3
4
4
NAME
VCC
LOWLINE
RESET
GND
FUNCTION
Input Supply Voltage, nominally +5V. Bypass with a 0.1µF capacitor to GND.
Low-Line Comparator Output. This CMOS-logic output goes low when VCC falls to 52mV
above the reset threshold. Use LOWLINE to generate an NMI, initiating an orderly shut-
down routine when VCC is falling. LOWLINE swings between VCC and GND.
Active-Low Reset Output. RESET is triggered and stays low when VCC is below the reset
threshold (or during a watchdog timeout for the MAX801). It remains low 200ms after
VCC 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 VCC ≥ 1V. RESET swings between VCC and GND.
Ground
6 _______________________________________________________________________________________
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