Datasheet

NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: [phone] Fax: [phone] Internet: www.isoloop.com
Functional Diagram
Features
· 2500 V
RMS
Isolation (1 min)
· 25 ns Propagation Delay
· 25 MBaud Data Rate
· 1 ns Pulse Skew (typ)
·
±60 mA Driver Output Capability
·
Thermal Shutdown Protection
·
Meets or Exceeds EIA 422-B, EIA 485-A and
ITU Recommendation V11
·
-40°C to +85°C Temperature Range
·
16 Pin SOIC Package
·
PROFIBUS International Component Recognition
·
UL 1577 Approval (pending)
·
IEC 61010-1 Approval (pending)
Applications
Multi-point or Multi-drop Transmission on Long Bus Lines
in Noisy Environments
Description
The IL422 is a galvanically isolated, high speed differential
driver and receiver pair, designed for bidirectional data
communication on balanced transmission lines. Isolation is
achieved through patented
*
Isoloop
®
technology. The IL422 is
the first isolated RS-422 interface available in a standard 16 pin
SOIC package, which meets the ANSI Standards EIA/TIA-422-B
and RS485.
The IL422 has current limiting and thermal shutdown features to
protect against output short circuits and bus contention situations
where these may cause excessive power dissipation.
Isolated RS422/RS485 Interface
Function Table
V
ID
1
V
ID
2
(Y-Z) (A-B) DE RE ISODE R D MODE
X
≥ 0.2V X L X H X Receive
X
≤
−0.2V
X
L
X
L X Receive
-7
<
V
ID
1
<12
-7
<
V
ID
2
<12
X H X Z X Receive/Drive
≥ 1.5
X
H L H H H Drive
≤
−1.5
X
H L H L L Drive
Open L L L H X Receive
H= High Level, L= Low Level,
X= Irrelevant, Z= High Impedance
Isoloop
®
is a registered trademark of NVE Corporation
* US Patent number 5,831,426; 6,300,617 and others
Ordering Information
IL422 Standard Part Number
IL422E Lead Free
IL422TR Tape and Reel
IL422ETR Lead Free/Tape and Reel
IL422
ISOLOOP
®