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MAX6340, MAX6421, MAX6422, MAX6423, MAX6424, MAX6425, MAX6426
Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
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Status
Active: In Production.
Description
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.
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Data Sheet
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Key Features
- 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
- MAX6426 Pin Compatible with PST92XX
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Applications/Uses
- Automotive
- Battery-Powered Computers/Controllers
- Computers
- Critical µP Monitoring
- Embedded Controllers
- Intelligent Instruments
- Medical Equipment
- Portable Equipment
- Set-Top Boxes
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Diagram
 Typical Operating Circuit
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-2440
Rev 4;
2006-12-05
This page last modified: 2008-03-13
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