ST485BD High-Performance Half-Duplex RS422/RS485 Transceiver | STMicroelectronics
ST485BD: High-Performance Half-Duplex RS422/RS485 Transceiver by STMicroelectronics
The ST485BD from STMicroelectronics is a highly reliable and robust half-duplex transceiver designed for industrial communication applications requiring RS422 and RS485 protocols. This integrated circuit (IC) is part of the Interface - Drivers, Receivers, Transceivers category within the broader classification of Integrated Circuits (ICs). Although marked as obsolete by the manufacturer, the ST485BD remains a popular choice for legacy systems due to its durability, performance, and compatibility with older designs.
In this comprehensive guide, we will delve into the key features, specifications, applications, and benefits of the ST485BD to help you understand why it continues to be a preferred choice in various industries.
Product Overview
Manufacturer and Part Number
- Manufacturer: STMicroelectronics
- Part Number: ST485BD
STMicroelectronics is a globally recognized leader in semiconductor innovation, known for producing high-quality ICs that cater to diverse application needs. The ST485BD exemplifies their commitment to providing reliable solutions for data transmission over long distances.
Key Features and Specifications
1. Type and Protocol
- Type: Transceiver
- Protocol: RS422, RS485
The ST485BD supports both RS422 and RS485 communication standards, making it versatile for multi-point bus architectures commonly found in industrial automation, process control, and instrumentation systems. These protocols ensure noise immunity and high-speed data transfer over extended cables.
2. Number of Drivers/Receivers
- Drivers/Receivers: 1/1
This configuration indicates that the device has one driver and one receiver, enabling efficient point-to-point or multi-drop communication setups.
3. Duplex Mode
- Duplex: Half
Operating in half-duplex mode allows the ST485BD to alternate between transmitting and receiving data on the same line, reducing the number of wires required and simplifying system design.
4. Receiver Hysteresis
- Hysteresis: 70 mV
The built-in hysteresis ensures stable operation even under noisy conditions, preventing false triggering and enhancing overall reliability.
5. Data Rate
- Data Rate: 2.5 Mbps
With a maximum data rate of 2.5 Mbps, the ST485BD delivers fast and accurate data communication suitable for demanding applications such as factory automation, building management systems, and telecommunications.
6. Voltage Supply
- Supply Voltage: 4.75V ~ 5.25V
Designed to operate within a narrow voltage range of 4.75V to 5.25V, the ST485BD ensures consistent performance while minimizing power consumption.
7. Operating Temperature
- Temperature Range: -40 C ~ 85 C
Its wide operating temperature range makes the ST485BD ideal for deployment in harsh environments, including outdoor installations, industrial facilities, and automotive applications.
8. Mounting Type
- Mounting Type: Surface Mount
Surface mount technology (SMT) enables compact and lightweight PCB designs, improving manufacturing efficiency and reducing costs associated with through-hole components.
9. Package/Case
- Package: 8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package: 8-SOIC
The small-outline integrated circuit (SOIC) package offers excellent thermal dissipation and mechanical stability, further contributing to the longevity and reliability of the ST485BD.
Applications
The ST485BD's combination of robustness, speed, and versatility makes it well-suited for a variety of applications, including:
- Industrial Automation Systems
- Process Control Equipment
- Data Acquisition Modules
- Telecommunication Networks
- Building Management Systems
- Automotive Electronics
Why Choose the ST485BD?
Despite being marked as obsolete, the ST485BD retains significant value for engineers working on legacy projects or maintaining existing infrastructure. Its proven track record, ease of integration, and compatibility with industry-standard protocols make it an attractive option for those who prioritize reliability and cost-effectiveness.
By choosing our ST485BD offering, you gain access to a trusted solution backed by expert technical support and competitive pricing. Whether you're upgrading an older system or designing new equipment, this transceiver provides the performance and flexibility needed to meet your project requirements.
Conclusion
The ST485BD from STMicroelectronics stands out as a dependable half-duplex RS422/RS485 transceiver tailored for demanding industrial environments. With its impressive data rate, robust receiver hysteresis, and broad operating temperature range, it continues to serve as a cornerstone component in countless applications worldwide.
For customers seeking reliable and affordable solutions for their communication needs, the ST485BD represents an excellent investment. Order now and experience the quality and performance that have made STMicroelectronics a household name in the semiconductor industry!
If you have any questions about the ST485BD or need assistance selecting the right product for your application, please don't hesitate to contact us. We look forward to helping you bring your ideas to life!