Overview
The SN75179BDE4, produced by Texas Instruments, is a differential driver and receiver pair designed for balanced transmission-line applications. It meets or exceeds the requirements of TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11. This device is optimized to enhance the performance of full-duplex data communications over long bus lines. It operates from a single 5-V supply and has low power requirements, making it suitable for a variety of industrial and communication systems.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.75 | 5 | 5.25 | V |
| High-Level Input Voltage (VIH) - Driver | - | - | 2 | V |
| Low-Level Input Voltage (VIL) - Driver | 0.8 | - | - | V |
| Common-Mode Input Voltage (VIC) | -7 | - | 12 | V |
| Differential Input Voltage (VID) | -12 | - | 12 | V |
| High-Level Output Current (IOH) - Driver | -60 | - | - | mA |
| Low-Level Output Current (IOL) - Driver | 60 | - | - | mA |
| Operating Free-Air Temperature (TA) | 0 | - | 70 | °C |
| Differential Output Delay Time (td(OD)) | 15 | 22 | - | ns |
| Differential Output Transition Time (tt(OD)) | 20 | 30 | - | ns |
Key Features
- Meets or exceeds the requirements of TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11.
- Bus voltage range: –7 V to 12 V.
- Positive- and negative-current limiting.
- Driver output capability: up to 60 mA maximum.
- Driver thermal-shutdown protection at approximately 150°C junction temperature.
- Receiver input impedance: minimum 12 kΩ.
- Receiver input sensitivity: ±200 mV.
- Receiver input hysteresis: 50 mV typical.
- Operates from a single 5-V supply.
- Low power requirements.
Applications
The SN75179BDE4 is suitable for various applications requiring reliable and high-performance differential signaling, including:
- Industrial control systems.
- Long-distance data communication systems.
- RS-422 and RS-485 interfaces.
- Full-duplex data communications over long bus lines.
Q & A
- What are the key standards that the SN75179BDE4 complies with?
The SN75179BDE4 meets or exceeds the requirements of TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11.
- What is the operating voltage range of the SN75179BDE4?
The device operates from a single 5-V supply with a voltage range of 4.75 V to 5.25 V.
- What is the maximum output current of the driver?
The driver can handle up to 60 mA maximum output current.
- What is the thermal shutdown protection feature?
The driver has thermal-shutdown protection designed to occur at a junction temperature of approximately 150°C.
- What is the input impedance of the receiver?
The receiver input impedance is a minimum of 12 kΩ.
- What is the input sensitivity of the receiver?
The receiver has an input sensitivity of ±200 mV.
- What is the common-mode input voltage range?
The common-mode input voltage range is –7 V to 12 V.
- What are the typical operating temperatures for the SN75179BDE4?
The device is characterized for operation from 0°C to 70°C.
- What are some common applications of the SN75179BDE4?
Common applications include industrial control systems, long-distance data communication systems, and RS-422 and RS-485 interfaces.
- Is the SN75179BDE4 RoHS compliant?
Yes, the SN75179BDE4 is RoHS compliant and available in various packages that meet green and Pb-Free standards.
