1

®

FN6060.2

ISL4486, ISL81486

5V, Ultra High Speed, PROFIBUS®,

RS-485/RS-422 Transceivers

The Intersil ISL4486 and ISL81486 are BiCMOS, 5V

powered, single transceivers that meet both the RS-485 and

RS-422 standards for balanced communication, and feature

the larger output voltage and higher data rate - up to

40Mbps - required by high speed PROFIBUS applications.

Unlike

competitive products, these Intersil devices are

specified for 10% tolerance supplies (4.5V to 5.5V) and

deliver at least a 2.3V differential output voltage over this

supply range. At the 5% tolerance specified by many

competitors, the ISL4486 delivers an unsurpassed 2.5V

differential signal into a 54

Ω total load. This translates into

longer reach, or better data integrity, at the exceptional

40Mbps data rate.

SCSI applications benefit from the ISL4486’s low receiver

and transmitter part-to-part skews, which make it perfect for

high speed parallel applications where large numbers of bits

must be simultaneously captured. The low bit-to-bit skew

eases the timing constraints on the data latching signal.

These devices present a “0.6 unit load” to the RS-485 bus,

which allows up to 50 transceivers on the network.

Receiver (Rx) inputs feature a “fail-safe if open” design,

which ensures a logic high Rx output if Rx inputs are floating.

Driver (Tx) outputs are short circuit protected, even for

voltages exceeding the power supply voltage. Additionally,

on-chip thermal shutdown circuitry disables the Tx outputs to

prevent damage if power dissipation becomes excessive.

Features

• Specified for 10% Tolerance Supplies

• High Data Rates

ISL4486 . . . . . . . . . . . . . . . . . . . . . . . . . . up to 40Mbps

ISL81486 . . . . . . . . . . . . . . . . . . . . . . . . . up to 30Mbps

• Large Differential Output Voltage . . . . . . . . . . 3V into 54

Ω

• Low Bit-to-Bit (Part-to-Part) Skew for Parallel Applications

• 0.6 Unit Load Allows up to 50 Devices on the Bus

• ISL81486 is a Drop-In Replacement for the ADM1486

• -7V to +12V Common Mode Input Voltage Range

• Three-State Rx and Tx Outputs

• 14ns (Max) Propagation Delays, 2ns (Max) Skew

• Operates from a Single +5V Supply (10% Tolerance)

• Current Limiting and Thermal Shutdown for driver

Overload Protection

• Pb-free available

Applications

• SCSI “Fast 40” Drivers and Receivers

• PROFIBUS DP and FMS Networks

• Factory Automation

• Field Bus Networks

• Security Networks

• Building Environmental Control Systems

• Industrial/Process Control Networks

Ordering Information

PART NO. (BRAND)

TEMP.

RANGE (°C)

PACKAGE

PKG.

DWG. #

ISL4486IB (4486IB)

-40 to 85

8 Ld SOIC

M8.15

ISL4486IBZ (4486IB)

(See Note)

-40 to 85

8 Ld SOIC

(Pb-free)

M8.15

ISL4486IU (4486)

-40 to 85

8 Ld MSOP

M8.118

ISL4486IUZ (4486)

(See Note)

-40 to 85

8 Ld MSOP

(Pb-free)

M8.118

ISL81486IB (81486IB)

-40 to 85

8 Ld SOIC

M8.15

ISL81486IBZ

(81486IB) (See Note)

-40 to 85

8 Ld SOIC

(Pb-free)

M8.15

ISL81486IU (1486)

-40 to 85

8 Ld MSOP

M8.118

ISL81486IUZ (1486)

(See Note)

-40 to 85

8 Ld MSOP

(Pb-free)

M8.118

*Add “-T” suffix to part number for tape and reel packaging.

NOTE: Intersil Pb-free products employ special Pb-free material sets; molding

compounds/die attach materials and 100% matte tin plate termination finish, which

is compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free

products are MSL classified at Pb-free peak reflow temperatures that meet or

exceed the Pb-free requirements of IPC/JEDEC J Std-020B.

Pinout

ISL4486, ISL81486 (SOIC, MSOP)

TOP VIEW

RO

RE

DE

DI

1

2

3

4

8

7

6

5

B/Z

A/Y

GND

D

R

Data Sheet

August 2004

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143

Copyright © Intersil Americas Inc. 2004. All Rights Reserved

All other trademarks mentioned are the property of their respective owners.