MAX9940 Maxim Integrated Products, MAX9940 Datasheet

MAX9940

Manufacturer Part Number

MAX9940

Description

Signal-Line Overvoltage Protector

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX9940.pdf (9 pages)

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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

afford standard means of fault protection, such as large

series resistors or large line capacitances.

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.

19-4168; Rev 0; 2/09

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

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Notebook Computers

Portable Devices

Industrial Equipment

MICROCONTROLLER

= 3.3V

ENABLE

________________________________________________________________ Maxim Integrated Products

DATA

General Description

2kΩ

INT

Signal-Line Overvoltage Protector

Applications

that cannot

NOTEBOOK

Block Diagram/Typical Application Circuit

for Low-Voltage Devices

PROTECTION

LOAD

CIRCUIT

♦ 28V Protection on EXT

♦ Extended ESD Protection

♦ +2.2V to +5.5V Supply Voltage Range

♦ 13µA Quiescent Supply Current

♦ 60ns Fault Reaction Time

♦ Small, 5-Pin SC70

♦ -40°C to +125°C Temperature Range

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

MAX9940AXK+

MAX9940

GND

±4kV IEC 61000-4 Contact on EXT

PART

EXT

NOTEBOOK

CHARGER

BATTERY

-40°C to +125°C

TEMP RANGE

Ordering Information

PACKAGE

DEVICE

1-Wire

5 SC70

PIN-

ADAPTER

Features

20V

MARK

TOP

ATC

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