IL422

Isoloop is a registered trademark of NVE Corporation.

*U.S. Patent number 5,831,426; 6,300,617 and others.

REV. S

NVE Corporation

11409 Valley View Road, Eden Prairie, MN 55344-3617

Phone: (952) 829-9217

www.nve.com

youtube.com/NveCorporation

iso-apps@nve.com

Isolated RS422/RS485 Interface

Functional Diagram

ISODE

A

B

Z

DE

D

R

RE

Y

IL422

IL422 Receiver

RE

R

V(A−B)

H

Z

X

L

H

≥

200 mV

L

L

≤

−200 mV

L

I

Open

IL422 Driver

DE

D

V(Y−Z)

L

X

Z

H

H

≥

1.5 V

H

L

≤

−1.5 V

Features

•

3.3 V Input Supply Compatible

•

25 ns Maximum Propagation Delay

•

25 Mbps Data Rate

•

1 ns Pulse Skew (typ.)

•

±60 mA Driver Output Capability

•

Thermal Shutdown Protection

•

Meets or Exceeds ANSI 422-B, EIA 485-A and

ITU Recommended V11

•

Low EMC Footprint

•

−40 °C to +85 °C Operating Temperature

•

PROFIBUS Compliant

•

2500 Vrms Isolation

•

IEC 60747-17 (VDE 0884-17):2021-10 certified; UL 1577 recognized

•

16-pin Wide-Body SOIC Package

Applications

Multi-point or multi-drop transmission on long bus lines in noisy

environments.

Description

The IL422 is a galvanically isolated, high-speed differential bus

transceiver, designed for bidirectional data communication on

balanced transmission lines. The devices use NVE’s patented*

spintronic Giant Magnetoresistance (GMR) technology. The IL422

was the first isolated RS-422 interface in a standard

16-pin SOIC package to meet the ANSI Standards EIA/TIA-422-B

and RS-485.

The IL422 has current limiting and thermal shutdown features to

protect against output short circuits and bus contention situations that

could cause excessive power dissipation.

H = High Level, L = Low Level

I = Indeterminate, X = Irrelevant, Z = High Impedance