ISO1176_15 Datasheet, PDF (1/37 Pages) Texas Instruments – Isolated RS-485 Profibus Transceiver

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ISO1176
SLLS897E – MARCH 2008 – REVISED JUNE 2015
ISO1176 Isolated RS-485 Profibus Transceiver
1 Features
•1 Meets or Exceeds the Requirements of
EN 50170 and TIA/EIA-485-A
• Signaling Rates up to 40 Mbps
• Differential Output Exceeds 2.1 V (54-Ω Load)
• Low Bus Capacitance – 10 pF (Maximum)
• Up to 160 Transceivers on a Bus
• 50 kV/μs Typical Transient Immunity
• Fail-Safe Receiver for Bus Open, Short, Idle
• 3.3-V Inputs are 5-V Tolerant
• Bus-Pin ESD Protection
– 16-kV HBM Between Bus Pins and GND2
– 6-kV HBM Between Bus Pins and GND1
• Safety and Regulatory Approvals
– 4000-V_PK Isolation, 560-V_PK V_IORM per DIN V
VDE V 0884-10 (VDE V 0884-10): 2006-12
and DIN EN 61010-1
– 2500 V_RMS Isolation Rating per UL 1577
– 4000 V_PK Isolation Rating per CSA CA5A and
IEC 60950-1
2 Applications
• Profibus
• Factory Automation
• Networked Sensors
• Motor and Motion Control
• HVA and Building Automation Networks
• Networked Security Stations
3 Description
The ISO1176 device is an isolated differential line
transceiver designed for use in PROFIBUS
applications. The device is ideal for long transmission
lines because the ground loop is broken to provide for
operation with a much larger common-mode voltage
range. The symmetrical isolation barrier of each
device is tested to provide 2500 V_RMS of isolation per
UL between the line transceiver and the logic level
interface.
The galvanically isolated differential bus transceiver is
an integrated circuit designed for bidirectional data
communication on multipoint bus-transmission lines.
The transceiver combines a galvanically isolated
differential line driver and differential input line
receiver. The driver has an active-high enable with
isolated enable-state output on the ISODE pin (pin
10) to facilitate direction control. The driver differential
outputs and the receiver differential inputs connect
internally to form a differential input/output (I/O) bus
port that is designed to offer minimum loading to the
bus allowing up to 160 nodes.
The PV pin (pin 7) is provided as a full-chip enable
option. All device outputs become high impedance
when a logic low is applied to the PV pin. For more
information, see the function tables in Device
Functional Modes.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ISO1176
SOIC (16)
10.30 mm × 7.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
ISO1176
Function Diagram
R3
RE ⁴
6
D
7
PV
DE ⁵
13 _B
12
A
10
ISODE
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.