ISO1176
Function Diagram
DE
6
D
5
R
3
4
RE
ISODE
10
B
A
13
12
PV
7
GALVANIC ISOLATION
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ISO1176
SLLS897E –MARCH 2008–REVISED JUNE 2015
ISO1176 Isolated RS-485 Profibus Transceiver
1 Features 3 Description
The ISO1176 device is an isolated differential line
1
• Meets or Exceeds the Requirements of
transceiver designed for use in PROFIBUS
EN 50170 and TIA/EIA-485-A
applications. The device is ideal for long transmission
• Signaling Rates up to 40 Mbps
lines because the ground loop is broken to provide for
• Differential Output Exceeds 2.1 V (54-Ω Load)
operation with a much larger common-mode voltage
range. The symmetrical isolation barrier of each
• Low Bus Capacitance – 10 pF (Maximum)
device is tested to provide 2500 V
RMS
of isolation per
• Up to 160 Transceivers on a Bus
UL between the line transceiver and the logic level
• 50 kV/μs Typical Transient Immunity
interface.
• Fail-Safe Receiver for Bus Open, Short, Idle
The galvanically isolated differential bus transceiver is
• 3.3-V Inputs are 5-V Tolerant
an integrated circuit designed for bidirectional data
communication on multipoint bus-transmission lines.
• Bus-Pin ESD Protection
The transceiver combines a galvanically isolated
– 16-kV HBM Between Bus Pins and GND2
differential line driver and differential input line
– 6-kV HBM Between Bus Pins and GND1
receiver. The driver has an active-high enable with
isolated enable-state output on the ISODE pin (pin
• Safety and Regulatory Approvals
10) to facilitate direction control. The driver differential
– 4000-V
PK
Isolation, 560-V
PK
V
IORM
per DIN V
outputs and the receiver differential inputs connect
VDE V 0884-10 (VDE V 0884-10): 2006-12
internally to form a differential input/output (I/O) bus
and DIN EN 61010-1
port that is designed to offer minimum loading to the
– 2500 V
RMS
Isolation Rating per UL 1577
bus allowing up to 160 nodes.
– 4000 V
PK
Isolation Rating per CSA CA5A and
The PV pin (pin 7) is provided as a full-chip enable
IEC 60950-1
option. All device outputs become high impedance
when a logic low is applied to the PV pin. For more
2 Applications
information, see the function tables in Device
Functional Modes.
• Profibus
• Factory Automation
Device Information
(1)
• Networked Sensors
PART NUMBER PACKAGE BODY SIZE (NOM)
• Motor and Motion Control
ISO1176 SOIC (16) 10.30 mm × 7.50 mm
• HVA and Building Automation Networks
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
• Networked Security Stations
Simplified Schematic
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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