Nanopower µP Supervisory Circuits with
Manual Reset and Watchdog Timer
Typical Operating Characteristics (continued)
(VCC = +2.5V, TA = +25°C, unless otherwise noted.)
0.30
0.25
0.20
0.15
0.10
0.05
0
0
OUTPUT LOW VOLTAGE
vs. SINK CURRENT
VCC = 1.8V
VCC = 2.5V
VCC = 3.3V
1000 2000 3000 4000 5000
ISINK (µA)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
0
OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
VCC = 2.5V
VCC = 1.8V
VCC = 3.3V
200 400 600 800 1000
ISOURCE (µA)
SUPPLY CURRENT vs. WATCHDOG
SWITCHING FREQUENCY
100
VCC = 2.5V
10
1
0.1
10 100 1k 10k 100k 1M 10M
WATCHDOG SWITCHING FREQUENCY (Hz)
VCC TO RESET DELAY
MAX6854 toc11
1.7V
VCC
200mV/div
VTH = 1.575V
1.5V
tRD
RESET
1V/div
0
10µs/div
MANUAL RESET DELAY
MAX6854 toc12
MR
tMRD
1V/div
200ns/div
RESET
1V/div
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