MAX9940

更新时间： 2024-11-15 11:14:07

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
9页	230K
描述
Signal-Line Overvoltage Protector for Low-Voltage Devices

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MAX9940 数据手册

19-4168; Rev 0; 2/09

Signal-Line Overvoltage Protector

for Low-Voltage Devices

MAX940

General Description

Features

The MAX9940 signal-line overvoltage protector for low-

voltage digital communication ports provides protection

against high-voltage faults and ESD strikes. The

MAX9940 is especially useful for sensitive communica-

tion protocols such as Maxim 1-Wire^®that cannot

afford standard means of fault protection, such as large

series resistors or large line capacitances.

♦ 28V Protection on EXT

♦ Extended ESD Protection

±±4V ꢀEꢁ ꢂ61110± ꢁontꢃct on EXT

♦ +2.2V to +5.5V Supply Voltꢃge Rꢃnge

♦ 63µA Quiescent Supply ꢁurrent

♦ ꢂ1ns Fꢃult Reꢃction Time

The MAX9940 operates from a single supply voltage of

+2.2V to +5.5V and consumes only 13µA of quiescent

supply current. The EXT port is protected up to 28V.

The device features a reaction time of 60ns for fast

action during fault conditions and operates over the

-40°C to +125°C automotive temperature range.

♦ Smꢃll, 50Pin Sꢁ71

♦ 0±1°ꢁ to +625°ꢁ Temperꢃture Rꢃnge

Applications

Ordering Information

Notebook Computers

Portable Devices

PꢀN0

PAꢁKAGE

TOP

MARK

PART

TEMP RANGE

MAX9940AXK+ -40°C to +125°C

5 SC70

ATC

Industrial Equipment

+Denotes a lead(Pb)-free/RoHS-compliant package.

1-Wire is a registered trademark of Maxim Integrated Products, Inc.

Block Diagram/Typical Application Circuit

ADAPTER

NOTEBOOK

= 3.3V

LOAD

NOTEBOOK

BATTERY

CHARGER

ENABLE

MAX9940

MICROCONTROLLER

2kΩ

PROTECTION

CIRCUIT

20V

1-Wire

DEVICE

DATA

EXT

INT

GND

________________________________________________________________ Mꢃxim ꢀntegrꢃted Products

For pricing, delivery, ꢃnd ordering informꢃtion, pleꢃse contꢃct Mꢃxim Direct ꢃt 608880ꢂ290±ꢂ±2,

or visit Mꢃxim’s website ꢃt www.mꢃxim0ic.com.

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