The MAX6340/MAX6421–MAX6426 low-power microprocessor
supervisor circuits monitor system voltages
from 1.6V to 5V. These devices perform a single function:
they assert a reset signal whenever the VCC supply voltage
falls below its reset threshold. The reset output
remains asserted for the reset timeout period after VCC
rises above the reset threshold. The reset timeout is externally
set by a capacitor to provide more flexibility.
The MAX6421/MAX6424 have an active-low, push-pull
reset output. The MAX6422 has an active-high,
push-pull reset output and the MAX6340/MAX6423/MAX6425/MAX6426 have an active-low, open-drain reset output. The MAX6421/MAX6422/MAX6423 are
offered in 4-pin SC70 or SOT143 packages. The
MAX6340/MAX6424/MAX6425/MAX6426 are available
in 5-pin SOT23-5 packages.
Key Features
Applications/Uses
Monitor System Voltages from 1.6V to 5V
Capacitor-Adjustable Reset Timeout Period
Low Quiescent Current (1.6µA typ)
Three RESET Output Options
Push-Pull Active-Low RESET
Push-Pull RESET
Open-Drain Active-Low RESET
Guaranteed Reset Valid to VCC = 1V
Immune to Short VCC Transients
Small 4-Pin SC70, 4-Pin SOT143, and 5-Pin SOT23
Packages
MAX6340 Pin Compatible with LP3470
MAX6424/MAX6425 Pin Compatible with
NCP300–NCP303, MC33464/MC33465,
S807/S808/S809, and RN5VD
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