ZHCSQ45A january 2023 – july 2023 THVD1454
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Pin Configuration and Functions
-
6 Specifications
- 6.1 Absolute Maximum Ratings
- 6.2 ESD Ratings
- 6.3 ESD Ratings [IEC]
- 6.4 Recommended Operating Conditions
- 6.5 Thermal Information
- 6.6 Power Dissipation
- 6.7 Electrical Characteristics
- 6.8 Switching Characteristics_500 kbps
- 6.9 Switching Characteristics_20 Mbps
- 6.10 Switching Characteristics_Termination resistor
- 6.11 Typical Characteristics
- 7 Parameter Measurement Information
- 8 Detailed Description
- 9 Application Information Disclaimer
- 10Device and Documentation Support
- 11Mechanical, Packaging, and Orderable Information
9.2 Typical Application
An RS-485 bus consists of multiple transceivers connecting in parallel to a bus cable. To eliminate line reflections, each cable end is terminated with a termination resistor, RT, whose value matches the characteristic impedance, Z0, of the cable. This method, known as parallel termination, allows for higher data rates over longer cable length. Figure 9-1 shows two end nodes terminated, while remaining nodes unterminated. THVD1454 can be designed in all node designs. TERM pin allows configuring the nodes for end nodes and middle nodes in the network.
Figure 9-1 Typical
Half Duplex RS-485 Network With all Nodes Using THVD1454