Overview
The SN75179BPSR, 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 is characterized for operation from 0°C to 70°C, making it suitable for a wide range of industrial and commercial applications.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.75 | 5 | 5.25 | V |
| Bus Voltage Range | -7 | 12 | V | |
| Driver Output Current | 60 | mA | ||
| Receiver Input Impedance | 12 | kΩ | ||
| Receiver Input Sensitivity | ±200 | mV | ||
| Receiver Input Hysteresis | 50 | mV | ||
| Propagation Delay Time (Low to High) | 19 | 35 | 40 | ns |
| Propagation Delay Time (High to Low) | 30 | 40 | ns | |
| Operating Temperature Range | 0 | 70 | °C |
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 for driver output.
- Driver thermal-shutdown protection at approximately 150°C junction temperature.
- High input impedance and input hysteresis for increased noise immunity in the receiver.
- Input sensitivity of ±200 mV over a common-mode input voltage range.
- Operates from a single 5-V supply with low power requirements.
- Capable of driving current loads up to 60 mA maximum.
Applications
The SN75179BPSR is suitable for various applications requiring reliable and high-performance differential data transmission, including:
- Industrial control systems.
- Remote sensors and actuators.
- Building automation systems.
- Point-of-sale terminals and other commercial equipment.
- Long-distance data communication networks.
Q & A
- What are the primary standards that the SN75179BPSR complies with?
The SN75179BPSR 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 for the SN75179BPSR?
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 current output of the driver?
The driver can output up to 60 mA maximum.
- What is the input impedance of the receiver?
The receiver input impedance is at least 12 kΩ.
- What is the input sensitivity of the receiver?
The receiver has an input sensitivity of ±200 mV.
- What is the purpose of the thermal shutdown feature in the driver?
The thermal shutdown feature protects the device from line fault conditions by shutting down at a junction temperature of approximately 150°C.
- What is the operating temperature range for the SN75179BPSR?
The device is characterized for operation from 0°C to 70°C.
- What types of packages are available for the SN75179BPSR?
The device is available in SOIC (D), PDIP (P), and SOP (PS) packages.
- What are some common applications for the SN75179BPSR?
Common applications include industrial control systems, remote sensors and actuators, building automation systems, and long-distance data communication networks.
- How does the SN75179BPSR enhance noise immunity?
The device features high input impedance and input hysteresis in the receiver to enhance noise immunity.
