ISO1176T 具有集成变压器驱动器的隔离式 ProfiBus 收发器 | 德州仪器

ISO1176T (正在供货)

具有集成变压器驱动器的隔离式 ProfiBus 收发器

具有集成变压器驱动器的隔离式 ProfiBus 收发器 - ISO1176T


  • ISO3086  -  Isolated 5V RS485 transceiver
  • ISO1176  -  Isolated Profibus RS-485 transceiver
  • ISO35  -  Isolated 3.3V RS-485 transceiver


The ISO1176T is an isolated differential line transceiver with integrated oscillator outputs that provide the primary voltage for an isolation transformer. The device is ideal for long transmission lines because the ground loop is broken to allow the device to operate with a much larger common-mode voltage range.

The symmetrical isolation barrier of each device is tested to provide 4242VPK of isolation per VDE for 60 seconds 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 whenever the driver is disabled or VCC2 = 0.

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 ISO1176T 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.


  • Meets or Exceeds the Requirements of EN 50170
    and TIA/EIA-485-A
  • Signaling Rates up to 40 Mbps
  • Easy Isolated Power Design with Integrated
    Transformer Driver
  • Typical Efficiency > 60% (ILOAD = 100 mA) - see
  • Differential Output exceeds 2.1 V (54-Ω Load)
  • Low Bus Capacitance 10 pF (Maximum)
  • Fail-safe Receiver for Bus Open, Short, or Idle
  • 50-kV/µs Typical Transient Immunity
  • Safety and Regulatory Approvals
    • 4242 VPK Basic Insulation per DIN V VDE V
      0884-10 and DIN EN 61010-1
    • 2500 VRMS Isolation for 1 minute per UL 1577
    • CSA Component Acceptance Notice 5A, IEC
      60950-1 and IEC 61010-1 Standards


参数 与其它产品相比 隔离式 RS-485 收发器

Isolation Rating (Vrms)
DIN V VDE V 0884-10 Transient Overvoltage Rating (Vpk)
Surge Voltage Rating (Vpk)
DIN V VDE V 0884-10 Working Voltage (Vpk)
CSA Isolation Rating (Vrms)
CSA 60950-1 Basic Working (Vrms)
CSA 61010-1 Basic Working (Vrms)
CSA 61010-1 Reinforced Working (Vrms)
Integrated Transformer Driver
Datarate (Mbps)
Number of Nodes
ESD (kV)
Fail Safe
Operating Temperature Range (C)
ISO1176T ISO3086T ISO35T
2500     2500     2500    
4242     4242     4242    
4000     4000     4000    
566     566     566    
3000     3000     3000    
760     760     760    
600     600     600    
150     150     150    
Yes     Yes     Yes    
Half     Full     Full    
40     20     1    
256     256     256    
10     11     16    
-40 to 85     -40 to 85     -40 to 85    
16SOIC     16SOIC     16SOIC