Overview
The SN75179BDR is a differential driver and receiver pair designed by Texas Instruments for balanced transmission-line applications. This component meets or exceeds the requirements of TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11. It is engineered to enhance the performance of full-duplex data communications over long bus lines. The SN75179BDR operates from a single 5-V supply and has low power requirements, making it efficient for various communication systems.
Key Specifications
| Specification | Value |
|---|---|
| Bus Voltage Range | –7 V to 12 V |
| Driver Output Capability | 60 mA Max |
| Driver Thermal-Shutdown Protection | Junction temperature of approximately 150°C |
| Receiver Input Impedance | 12 kΩ Min |
| Receiver Input Sensitivity | ±200 mV |
| Receiver Input Hysteresis | 50 mV Typ |
| Supply Voltage | 4.75 V to 5.25 V |
| Operating Temperature Range | 0°C to 70°C |
| Package Type | 8-SOIC (0.154", 3.90mm Width) |
Key Features
- Meets or exceeds the requirements of TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11.
- Positive- and negative-current limiting for driver output.
- Driver thermal-shutdown protection at a junction temperature of approximately 150°C.
- High receiver input impedance (12 kΩ Min) and input hysteresis for increased noise immunity.
- Input sensitivity of ±200 mV over a common-mode input voltage range of –7 V to 12 V.
- Operates from a single 5-V supply with low power requirements.
Applications
The SN75179BDR is suitable for various applications requiring reliable and efficient full-duplex data communication over long bus lines. These include:
- Industrial control systems.
- Telecommunications equipment.
- Point-of-sale terminals.
- Remote sensors and data acquisition systems.
- Any system requiring RS-422 or RS-485 communication interfaces.
Q & A
- What are the main standards that the SN75179BDR complies with?
The SN75179BDR meets or exceeds the requirements of TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11.
- What is the bus voltage range of the SN75179BDR?
The bus voltage range is –7 V to 12 V.
- What is the maximum driver output current of the SN75179BDR?
The maximum driver output current is 60 mA.
- What is the thermal shutdown protection feature of the SN75179BDR?
The driver provides thermal shutdown protection at a junction temperature of approximately 150°C.
- What is the input impedance of the receiver in the SN75179BDR?
The receiver input impedance is 12 kΩ Min.
- What is the input sensitivity of the receiver in the SN75179BDR?
The receiver input sensitivity is ±200 mV.
- What is the operating temperature range of the SN75179BDR?
The operating temperature range is 0°C to 70°C.
- What type of package is the SN75179BDR available in?
The SN75179BDR is available in an 8-SOIC package.
- Does the SN75179BDR operate from a single supply voltage?
- What are some common applications of the SN75179BDR?
