SN75176BDR Characteristics, Working Principle and Applications
15 January 2024
Ⅱ. Specifications of SN75176BDR
Ⅲ. What are the characteristics of SN75176BDR?
Ⅳ. Symbol, footprint and pin configuration of SN75176BDR
Ⅴ. Simplified schematic of SN75176BDR
Ⅶ. What are the applications of SN75176BDR?
The SN75176BDR is a differential bus transceiver designed for bidirectional data communication on multipoint bus transmission lines. They are designed for balanced transmission lines and comply with ANSI standards TIA/EIA-422-B and TIA/EIA-485-A and ITU recommendations V.11 and X.27. The SN75176B device combines a three-state differential line driver and a differential input line receiver, both operating from a single 5V supply. The driver and receiver have active high and active low enable signals respectively, which can be connected together externally for use as direction control. The driver differential outputs and receiver differential inputs are internally connected to form differential input/output (I/O) bus ports that are designed to provide minimum loading to the bus when the driver is disabled or VCC=0.
Alternatives and equivalents:
• SN75176BDR is manufactured by Texas Instruments.
• Its data rate is 10 Mb/s.
• Its operating temperature is 0°C to 70°C.
• Its installation method is SMD or SMT.
• Its power supply voltage is 4.75 V to 5.25 V.
• It has 8 pins and comes in SOIC-8 package and Tape and Reel packaging.
• Its length is 4.9 mm, width is 3.91 mm and height is 1.58 mm.
• High-speed data transmission: The chip supports high-speed data transmission, with a maximum transmission rate of up to 10Mbps.
• Compatible with multiple protocols: SN75176BDR is compatible with RS-422 and RS-485 communication standards. It not only has high-speed data transmission capabilities, but also supports long-distance data transmission. At the same time, it also has low power consumption and strong anti-interference ability, and can maintain stable working status in complex electromagnetic environment.
• Two-way communication: SN75176BDR supports full-duplex and half-duplex communication modes and can transmit data in both directions simultaneously.
• Easy to use: The chip has a simple and easy-to-use interface that can be easily connected to other devices or systems.
• Good reliability and stability: The chip has good reliability, stability and scalability, which can help developers maintain an advantage in the ever-changing market competition.
• Suitable for a variety of working environments: SN75176BDR offers distinct application advantages in various working environments. For instance, RS-485 communication surpasses RS-422 in settings with substantial electromagnetic fields or inductive coupling noise. On the other hand, RS-422 communication proves more suitable for high-speed, multi-node, and multi-master communication networks.
The above figure shows the symbol, footprint and pin configuration of SN75176BDR, which has eight pins with the following names and descriptions:
Pin 1 (R): Logic data output from RS-485 receiver
Pin 2 (RE'): Receive enable (active low)
Pin 3 (DE): Driver enable (active high)
Pin 4 (D): Logic data input to RS-485 driver
Pin 5 (GND): Device ground pin
Pin 6 (A): RS-422 or RS-485 data line
Pin 7 (B): RS-422 or RS-485 data line
Pin 8 (Vcc): Power input. Connect to 5-V power source
The SN75176BDR is a commonly used RS-485/RS-422 transceiver chip. RS-485 is a differential signaling standard that uses two lines for communication, the non-inverting (A) and inverting (B) lines. The signals on these two lines are reversed, which helps improve immunity to interference and signal quality.
The transmitter side of the SN75176BDR receives logic level signals from the control circuit and then converts them to differential level signals and sends them to the A and B lines. The chip contains an internal differential transmitter, which is responsible for converting the logic level to the appropriate voltage difference. The receiver is responsible for receiving differential signals from lines A and B and converting them to logic level signals. The SN75176BDR contains internal differential receivers for improved immunity to interference and for recognizing signals from remote transmitters. In addition, the SN75176BDR is designed with a common-mode rejection circuit that resists effects from environmental noise and other electromagnetic interference. This helps ensure reliable data transmission in industrial environments. The chip also typically includes overvoltage and overcurrent protection circuits to protect the chip from damage caused by external electrical interference.
Because of its powerful features, the SN75176BDR is widely used in a variety of fields.
• Vehicle bus systems: In automobiles and industrial vehicles, the SN75176BDR can be used to communicate between various subsystems within the vehicle. For example, it can realize data transmission between engine control units, sensors and instrument panels. At the same time, it can also be used for information sharing between various subsystems, thus making vehicle traveling safer and more efficient.
• Communication equipment: In network equipment and communication equipment, the chip can be used for differential signal transmission, thus improving anti-interference ability and communication distance.
• Instrumentation: In environments with significant electromagnetic interference, conventional signal transmission methods are prone to disruption, leading to signal distortion or error codes. The SN75176BDR's differential signal transmission method exhibits robust resistance to interference, ensuring precise signal transmission in such conditions. Furthermore, the SN75176BDR offers high reliability, facilitating accurate data transmission in diverse complex environments and thereby ensuring the stable operation of the entire system.
• Industrial control system: SN75176BDR is usually used to connect the communication link between sensors, actuators and controllers to realize reliable data transmission in industrial control systems.
• Power system communication: In power systems, the SN75176BDR can be used for communication between data acquisition, monitoring and protection devices to ensure stable operation of the power system.
• Automation system: The chip can also be applied to establish communication links between devices. By using the SN75176BDR, different devices or nodes can exchange information quickly and accurately to collaborate on various automation tasks.
Frequently Asked Questions
1. What is the operating temperature range of SN75176BDR?
The operating temperature of SN75176BDR ranges from 0°C to 70°C.
2. How does SN75176BDR handle short-circuit conditions?
The SN75176BDR is designed to withstand and recover from short-circuit conditions on the bus lines.
3. What is the SN75176BDR used for?
The SN75176BDR is an RS-485 transceiver, commonly used for communication in industrial and long-distance data transmission applications.
4. What is the difference between RS-485 and RS232?
RS232 is more than able to perform for a short distance and low data speed requirements. RS232 has a transmission speed of 1Mb/s up to 15M. However, RS485 has a data transmission speed of up to 10Mb/s for a distance of 15M. At the maximum of 1200M, RS485 transmits at 100Kb/s.
