IL3585
Isoloop® is a registered trademark of NVE Corporation.
*U.S. Patent number 5,831,426; 6,300,617 and others.
ISB-DS-001-IL612-A, January 20, 2005
NVE Corp., 11409 Valley View Road, Eden Prairie, MN 55344-3617, U.S.A.
Telephone: 952-829-9217, Fax 952-829-9189, www.isoloop.com
© 2005 NVE Corporation
PROFIBUS Compatible Isolated RS485 Interface
Functional Diagram
VID (A-B)
DE
RE
R
D
Mode
≥ 200 mV
L
L
H
X
Receive
≤ -200 mV
L
L
L
X
Receive
≥1.5 V
H
L
H
H
Drive
≤ -1.5 V
H
L
L
L
Drive
X
X
H
Z
X
Hi Z R
Features
• 3.3 / 5 V Input Supply Compatible
• 2500 VRMS Isolation (1 min)
• 20 ns Propagation Delay
• 40 Mbps Data Rate
• 5 ns Pulse Skew
• 20 kV/us Transient Immunity
• Thermal Shutdown Protection
• -40°C to +85°C Temperature Range
• PROFIBUS Compliant
• 16 Pin SOIC Package
• UL1577 Approval Pending
• IEC 61010-1 Approval Pending
Applications
• Security Networks
• ProfiBus DP and FMS Networks
• Building Environmental Controls
• Industrial Control Networks
• Gaming Systems
• Factory Automation
Description
The IL3585 is a galvanically isolated, high-speed differential bus
transceiver, designed for bi-directional data communication on
balanced transmission lines. Isolation is achieved through patented*
Isoloop® technology. The IL3585 offers an exceptional 2.5 V
differential output into a 54
Ωload, which translates to better data
integrity over longer cable lengths, even at data rates as high as 40
Mbps. The device is also compatible with 3.3V input supplies,
allowing interface to standard microcontrollers without the need for
additional level shifting components.
The IL3585 has current limiting and thermal shutdown features to
protect against output short circuits and bus contention situations
which may cause excessive power dissipation.
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