MAX6467XS17D3-T 查看數據表（PDF） - Maxim Integrated

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MAX6467XS17D3-T

Microprocessor Supervisory Reset Circuits with Edge-Triggered, One-Shot Manual Reset

Maxim Integrated 

MAX6467/MAX6468

Microprocessor Supervisory Reset Circuits

with Edge-Triggered, One-Shot Manual Reset

General Description

The MAX6467/MAX6468 microprocessor (µP) supervisory

circuits monitor single power-supply voltages from +1.8V

to +5.0V and assert a reset if the supply voltage drops

below its preset threshold. An edge-triggered, one-shot

manual reset function ensures that the µP enters the reset

mode for a fixed timeout period only, even in the event

of a continuously asserted manual reset. The MAX6467/

MAX6468 significantly improve system reliability compared

to traditional manual reset supervisory circuits.

A variety of factory-trimmed threshold options accommodate

different supply voltages and tolerances, eliminating

external components. The factory-set thresholds range

from +1.575V to +4.625V to monitor +5.0V, +3.3V, +3.0V,

+2.5V, and +1.8V supplies with various tolerances. Reset

timeout periods of 150ms (min) and 1200ms (min) are

available to accommodate different µP platforms.

A single, active-low RESET output asserts when VCC

drops below its threshold or if the edge-triggered MR

asserts low. RESET remains low for the reset time-

out period after VCC rises above its threshold and for

a fixed, one-shot timeout period after a manual reset

input falling edge. RESET remains valid as long as VCC

remains above +1V. Open-drain (MAX6467) and push-

pull (MAX6468) output options provide additional flexibility

in the system design.

The MAX6467/MAX6468 are offered in the space-saving

4-pin SOT143 package and the ultra-small 4-pin SC70

package and are specified over the automotive (-40°C to

+125°C) temperature range.

Applications

●● Cell Phones/PDAs

●● Embedded Control Systems

●● Industrial Equipment

●● Automotive Products

●● Portable/Battery-Powered Equipment

●● Medical Devices

●● DSL Modems

●● MP3 Players

●● GPS Systems

●● Digital Cameras

Features

●● Precision Factory-Set Reset Threshold Voltages for

+5.0V, +3.3V, +3.0V, +2.5V, and +1.8V Supplies

●● Edge-Triggered Manual Reset Input with One-Shot

Pulsed Reset Output

●● Two Reset Timeout Period Options (150ms or

1200ms min)

●● Immune to Short Voltage Transients

●● Low Supply Current (3µA at VCC = +1.8V)

●● RESET Valid to VCC = +1V

●● Active-Low Open-Drain and Push-Pull RESET

Output Options

●● -40°C to +125°C Operating Temperature Range

●● Small 4-Pin SC70 and SOT143 Packages

●● No External Components Required

●● Pin Compatible with MAX811, MAX6315, MAX6384,

and MAX6386

●● AEC-Q100 Qualified, Refer to Ordering Information

for Specific /V Parts

Ordering Information appears at end of data sheet.

Typical Operating Circuit

+1.0V TO +5.5V

VCC

MAX6467

MAX6468

MR

RESET

VCC

RESET µP

INPUT

GND

GND

19-2523; Rev 6; 3/18

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