SN65HVD21集成电路（IC）的驱动器接收器收发器规格书PDF中文资料

SN65HVD21属于集成电路（IC）的驱动器接收器收发器。由德州仪器制造生产的SN65HVD21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。

1 Features

• Common-mode voltage range (–20 V to 25 V)

more than doubles TIA/EIA-485 requirement

• Receiver equalization extends cable length,

signaling rate (SN65HVD2[3,4])

• Reduced unit-load for up to 256 nodes

• Bus I/O protection to over 16-kV HBM

• Failsafe receiver for open-circuit, short-circuit, and

idle-bus conditions

• Low standby supply current 1 μA (maximum)

• More than 100 mV receiver hysteresis

2 Applications

• Long cable solutions

– Factory automation

– Security networks

– Building HVAC

• Severe electrical environments

– Electrical power inverters

– Industrial drives

– Avionics

3 Description

The transceivers in the SN65HVD2x family offer

performance far exceeding typical RS-485 devices.

In addition to meeting all requirements of the

TIA/EIA‑485-A standard. The SN65HVD2x family

operates over an extended range of common-mode

voltages and has features such as high ESD

protection, wide receiver hysteresis, and failsafe

operation. This family of devices is designed for longcable

networks, and other applications where the

environment is too harsh for ordinary transceivers.

These devices are designed for bidirectional data

transmission on multipoint twisted-pair cables.

Example applications are digital motor controllers,

remote sensors and terminals, industrial process

control, security stations, and environmental control

systems.

These devices combine a 3-state differential driver

and a differential receiver that operate from a single

5-V power supply. The driver differential outputs and

the receiver differential inputs are connected internally

to form a differential bus port that offers minimum

loading to the bus. This port features an extended

common-mode voltage range, making the device

suitable for multipoint applications over long cable

runs.