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ISO1176_1

更新时间： 2024-11-07 05:39:47
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德州仪器 - TI /
页数 文件大小 规格书
25页 824K
描述
ISOLATED RS-485 PROFIBUS TRANSCEIVER

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ISO1176_1 数据手册

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ISO1176  
www.ti.com .................................................................................................................................................. SLLS897C–MARCH 2008–REVISED OCTOBER 2008  
ISOLATED RS-485 PROFIBUS TRANSCEIVER  
1
FEATURES  
•
•
•
50 kV/µs Typical Transient Immunity  
Failsafe Receiver for Bus Open, Short, Idle  
3.3-V Inputs are 5-V Tolerant  
•
4000-VPEAK Isolation  
•
Bus-Pin ESD Protection  
–
–
16 kV HBM Between Bus Pins and GND2  
6 kV HBM Between Bus Pins and GND1  
APPLICATIONS  
•
•
•
•
•
•
Profibus  
Factory Automation  
Networked Sensors  
Motor/Motion Control  
HVA and Building Automation Networks  
Networked Security Stations  
•
Meets or Exceeds the Requirements of  
EN 50170 and TIA/EIA-485  
•
•
•
Signaling Rates up to 40 Mbps  
Differential Output Exceeds 2.1 V (54 Ω Load)  
Low Bus Capacitance – 10 pF (MAX)  
DESCRIPTION  
The ISO1176 is an isolated differential line transceiver designed for use in PROFIBUS applications. The device  
is ideal for long transmission lines since 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 Vrms of  
isolation between the line transceiver and the logic level interface.  
The galvanically isolated differential bus transceiver is an integrated circuit designed for bi-directional 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 the device information section.  
Any cabled I/O can be subjected to electrical noise transients from various sources. These noise transients can  
cause damage to the transceiver and/or near-by sensitive circuitry if they are of sufficient magnitude and  
duration. The ISO1176 can significantly reduce the risk of data corruption and damage to expensive control  
circuits.  
The device is characterized for operation over the ambient temperature range of –40°C to 85°C.  
DW PACKAGE  
(TOP VIEW)  
ISO1176  
function diagram  
VCC2  
VCC1  
GND 1  
R
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
13  
12  
GND 2  
NC  
B
A
3
4
R
RE  
RE  
B
6
7
5
D
PV  
DE  
DE  
D
A
NC  
11  
10  
9
10  
PV  
ISODE  
GND 2  
ISODE  
GND 1  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2008, Texas Instruments Incorporated  
1234567...25

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