General Description

The MAX3406/MAX3407/MAX3408 are general-purpose

line-terminating networks designed to change the termi-

nation value of a line, depending on the state of a digi-

tal control line, allowing the connection to a coaxial

cable or a twisted pair wire. These devices are switch-

able between 75

Ω, 100Ω, and 120Ω. The MAX3406

can switch from 75

Ω to 100Ω, the MAX3407 can switch

from 75

Ω to 120Ω, and the MAX3408 can switch from

100

Ω to 120Ω termination. Termination resistance val-

ues are guaranteed to ±2.5% through -40°C to +85°C

and for signal levels of ±3.6V.

The MAX3406/MAX3407/MAX3408 consume only 50µA

supply current and are fully specified for operation from

a +4.5V to +5.5V power supply. These devices are avail-

able in a tiny 5-pin SOT23 package. All specifications

are guaranteed over the extended temperature range of

-40°C to +85°C.

Applications

Telecom E1/T1/J1 Coax/Twisted Pair Termination

Data Routers

Telecom Racks

Video Security

Industrial Networks

Ethernet Networks

Features

o Available in 5-Pin SOT Package

o ±2.5% Resistance Accuracy Over Extended

Temperature Range

o -3.6V to +3.6V Input Voltage Range

o 50µA Supply Current (max)

o Bipolar Input Range Off a Single Supply

o Switchable Termination

75

Ω or 100Ω (MAX3406)

75

Ω or 120Ω (MAX3407)

100

Ω or 120Ω (MAX3408)

75

Ω/100Ω/120Ω Switchable Termination

Networks

________________________________________________________________ Maxim Integrated Products

1

GND

B

ENABLE

15

A

MAX3406

MAX3407

MAX3408

SOT23-5

TOP VIEW

2

34

Pin Configuration

Ordering Information

19-2141; Rev 0; 8/01

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP.

RANGE

PIN-

PACKAGE

TOP

MARK

MAX3406EUK

-40

°C to +85°C

5 SOT23-5

ADSV

MAX3407EUK

-40

°C to +85°C

5 SOT23-5

ADSW

MAX3408EUK

-40

°C to +85°C

5 SOT23-5

ADSX

Selector Guide

TERMINATION

PART

ENABLE = 1

ENABLE = 0

MAX3406EUK

75

Ω

100

Ω

MAX3407EUK

75

Ω

120

Ω

MAX3408EUK

100

Ω

120

Ω