1

®

FN6365.2

ISL3179E, ISL3180E

High ESD Protected, +125°C, 40Mbps,

3.3V, Full Fail-Safe, RS-485/RS-422

Transceivers

Intersil’s ISL3179E and ISL3180E are high ESD Protected

(see Table 1 below), 3.3V powered, single transceivers that

meet both the RS-485 and RS-422 standards for balanced

communication. Each device has low bus currents

(+220µA/-150µA), so it presents a “1/5 unit load” to the

RS-485 bus. This allows up to 160 transceivers on the

network without violating the RS-485 specification’s 32 unit

load maximum, and without using repeaters.

Receiver (Rx) inputs feature a “Full Fail-Safe” design, which

ensures a logic high Rx output if Rx inputs are floating,

shorted, or terminated but undriven.

The ISL3180E is configured for full duplex applications. The

ISL3179E half duplex version multiplexes the Rx inputs and

Tx outputs to allow a transceiver with an output disable

function in 8 Ld packages.

Hot Plug circuitry ensures that the Tx and Rx outputs remain

in a high impedance state while the power supply stabilizes.

Features

• High ESD Protection on RS-485 I/O Pins

- ISL3179E . . . . . . . . . . . . . . . . . . . . . ±16.5kV IEC61000

- ISL3180E . . . . . . . . . . . . . . . . . . . . . . . . . . ±12kV HBM

- Class 3 HBM ESD Level on all Other Pins . . . . . . . >9kV

• Specified for +125°C Operation

• High Data Rates . . . . . . . . . . . . . . . . . . . . . . up to 40Mbps

• 5V Tolerant Logic Inputs

• 1/5 Unit Load Allows up to 160 Devices on the Bus

• Full Fail-Safe (Open, Shorted, Terminated/Undriven)

Receiver

• Hot Plug - Tx and Rx Outputs Remain Three-State During

Power-Up

• Low Quiescent Current . . . . . . . . . . . . . . . . . . 4mA (Max)

• Low Current Shutdown Mode. . . . . . . . . . . . . . 1µA (Max)

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

• Three-State Rx and Tx Outputs

• 16/16.5ns (Max) Tx/Rx Propagation Delays; 1.5ns (Max)

Skew

• Operates from a Single +3.3V Supply (10% Tolerance)

• Current Limiting and Thermal Shutdown for driver

Overload Protection

• Pb-Free (RoHS Compliant)

Applications

• Motor Controller/Position Encoder Systems

• Factory Automation

• Field Bus Networks

• Security Networks

• Building Environmental Control Systems

• Industrial/Process Control Networks

Ordering Information

PART

NUMBER

(Note)

PART

MARKING #

TEMP.

RANGE

(°C)

PACKAGE

(Pb-Free)

PKG.

DWG. #

ISL3179EFBZ* 3179 EFBZ

-40 to +125 8 Ld SOIC

M8.15

ISL3179EFUZ* 179FZ

-40 to +125 8 Ld MSOP

M8.118

ISL3179EFRZ* 79FZ

-40 to +125 10 Ld DFN

L10.3x3C

ISL3179EIBZ*

3179 EIBZ

-40 to +85 8 Ld SOIC

M8.15

ISL3179EIUZ*

179IZ

-40 to +85 8 Ld MSOP

M8.118

ISL3179EIRZ*

79IZ

-40 to +85 10 Ld DFN

L10.3x3C

ISL3180EIBZ*

ISL3180 EIBZ

-40 to +85 14 Ld SOIC

M14.15

*Add “-T” suffix for tape and reel. Please refer to TB347 for details on

reel specifications

NOTE: These Intersil Pb-free plastic packaged products employ special

Pb-free material sets; molding compounds/die attach materials and

100% matte tin plate PLUS ANNEAL - e3 termination finish, which is

RoHS compliant and 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-020.

TABLE 1. SUMMARY OF FEATURES

PART

NUMBER

HALF/FULL

DUPLEX

DATA RATE

(Mbps)

RS-485 PIN

ESD LEVEL

HOT

PLUG?

RX/TX

ENABLE?

QUIESCENT

LOW POWER

SHUTDOWN?

PIN

COUNT

ISL3179E

HALF

40

16.5kV IEC61000

YES

YES

2.6

YES

8, 10

ISL3180E

FULL

40

12kV HBM

YES

YES

2.6

YES

14

Data Sheet

April 22, 2008

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

1-888-INTERSIL or 1-888-468-3774

Copyright Intersil Americas Inc. 2007, 2008. All Rights Reserved

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