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MAX6421：Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay

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 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

MAX6340, MAX6421, MAX6422, MAX6423, MAX6424, MAX6425, MAX6426: Typical Operating Circuit Applications/Uses Automotive Battery-Powered Computers/Controllers Computers Critical µP Monitoring Embedded Controllers Intelligent Instruments Medical Equipment Portable Equipment Set-Top Boxes

DataSheet

Parametrics

Quality and Environmental Data

• MAX6421.pdf

Related Products

• MAX6420：Low-Power, Single/Dual-Voltage µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
• MAX6412：Low-Power, Single/Dual-Voltage µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
• MAX6381：SC70/µDFN, Single/Dual Low-Voltage, Low-Power µP Reset Circuits
• MAX6303：+5V, Low-Power, µP Supervisory Circuits with Adjustable Reset/Watchdog
• MAX6304：+5V, Low-Power, µP Supervisory Circuits with Adjustable Reset/Watchdog
• MAX6301：+5V, Low-Power, µP Supervisory Circuits with Adjustable Reset/Watchdog
• MAX6302：+5V, Low-Power, µP Supervisory Circuits with Adjustable Reset/Watchdog

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