SN65HVD1176中文资料PROFIBUS RS-485 收发器数据手册TI规格书

描述 Description

The SNx5HVD1176 devices are half-duplex differential transceivers with characteristics optimized for use in PROFIBUS (EN 50170) applications. The driver output differential voltage exceeds the PROFIBUS requirements of 2.1 V with a 54-Ω load. A signaling rate of up to 40 Mbps allows technology growth to high data-transfer speeds. The low bus capacitance provides low signal distortion.The SN65HVD1176 and SN75HVD1176 devices meet or exceed the requirements of ANSI standard TIA/EIA-485-A (RS-485) for differential data transmission across twisted-pair networks. The driver outputs and receiver inputs are tied together to form a half-duplex bus port with one-fifth unit load, which allows up to 160 nodes on a single bus. The receiver output stays at logic high when the bus lines are shorted, left open, or when no driver is active. The driver outputs are in high impedance when the supply voltage is below 2.5 V to prevent bus disturbance during power cycling or during live insertion to the bus. An internal current limit protects the transceiver bus pins in short-circuit fault conditions by limiting the output current to a constant value. Thermal shutdown circuitry protects the device against damage due to excessive power dissipation caused by faulty loading and drive conditions.The SN75HVD1176 device is characterized for operation at temperatures from 0°C to 70°C. The SN65HVD1176 device is characterized for operation at temperatures from –40°C to 85°C.For an isolated version of this device, see the ISO1176 device (SLLS897) with integrated digital isolators.

The SNx5HVD1176 devices are half-duplex differential transceivers with characteristics optimized for use in PROFIBUS (EN 50170) applications. The driver output differential voltage exceeds the PROFIBUS requirements of 2.1 V with a 54-Ω load. A signaling rate of up to 40 Mbps allows technology growth to high data-transfer speeds. The low bus capacitance provides low signal distortion.The SN65HVD1176 and SN75HVD1176 devices meet or exceed the requirements of ANSI standard TIA/EIA-485-A (RS-485) for differential data transmission across twisted-pair networks. The driver outputs and receiver inputs are tied together to form a half-duplex bus port with one-fifth unit load, which allows up to 160 nodes on a single bus. The receiver output stays at logic high when the bus lines are shorted, left open, or when no driver is active. The driver outputs are in high impedance when the supply voltage is below 2.5 V to prevent bus disturbance during power cycling or during live insertion to the bus. An internal current limit protects the transceiver bus pins in short-circuit fault conditions by limiting the output current to a constant value. Thermal shutdown circuitry protects the device against damage due to excessive power dissipation caused by faulty loading and drive conditions.The SN75HVD1176 device is characterized for operation at temperatures from 0°C to 70°C. The SN65HVD1176 device is characterized for operation at temperatures from –40°C to 85°C.For an isolated version of this device, see the ISO1176 device (SLLS897) with integrated digital isolators.

特性 Features

• Optimized for PROFIBUS Networks
• Signaling Rates up to 40 Mbps
• Differential Output Exceeds 2.1 V (54-Ω Load)
• Low Bus Capacitance of 10 pF (Max)

• Meets the Requirements of TIA/EIA-485-A
• ESD Protection Exceeds ±10-kV HBM
• Fail-Safe Receiver for Bus Open, Short, Idle
• Up to 160 Transceivers on a Bus
• Low Skew During Output Transitions and Driver Enabling and Disabling
• Common-Mode Rejection up to 50 MHz
• Short-Circuit Current Limit
• Hot Swap Capable
• Thermal Shutdown Protection

简介

SN65HVD1176属于集成电路（IC）的驱动器接收器收发器。由TI制造生产的SN65HVD1176驱动器，接收器，收发器该系列产品的主要功能是提供必需的硬件资源，以通过延长电缆或印制线进行通信。确切的功能会因所采用的通信协议而异，可能包括诸如瞬态抑制之类的功能，这些功能对于通信用途可能并非绝对必要，但对于可能的使用环境却是明智之选。