Overview
The SN65LBC179QDG4, produced by Texas Instruments, is a low-power differential line driver and receiver pair designed for high-speed multipoint data transmission over long cables. These devices are part of the SN65LBC179 family and are characterized for operation over the extended industrial or automotive temperature range of −40°C to 125°C. They are monolithic integrated circuits that combine a differential line driver and differential line receiver, operating from a single 5-V supply. The SN65LBC179QDG4 is built using TI’s proprietary LinBiCMOS™ technology, which combines the low power consumption of CMOS with the precision and robustness of bipolar transistors.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.75 | 5 | 5.25 | V |
| High-Level Input Voltage (VIH) | - | - | 2 | V |
| Low-Level Input Voltage (VIL) | - | - | 0.8 | V |
| Differential Input Voltage (VID) | -6 | - | 6 | V |
| Voltage at Any Bus Terminal | -7 | - | 12 | V |
| High-Level Output Current (IOH) | -60 | - | - | mA |
| Low-Level Output Current (IOL) | 60 | - | - | mA |
| Junction Temperature (TJ) | - | - | 140 | °C |
| Operating Free-Air Temperature (TA) | -40 | - | 125 | °C |
| Propagation Delay Time (tPHL, tPLH) | 15 | 30 | - | ns |
| Pulse Skew (|tPHL - tPLH|) | 3 | 6 | - | ns |
Key Features
- Designed for high-speed multipoint data transmission over long cables.
- Operates with pulse widths as low as 30 ns.
- Low supply current: 5 mA max.
- Meets or exceeds the standard requirements of ANSI RS-485 and ISO 8482:1987(E).
- Wide common-mode voltage range of −7 V to 12 V.
- Positive- and negative-output current limiting.
- Driver thermal shutdown protection at approximately 172°C junction temperature.
- Pin compatible with the SN75179B.
- Full-duplex operation with separate terminals for driver and receiver.
- Bus-pin ESD protection exceeds 12 kV HBM.
Applications
The SN65LBC179QDG4 is suitable for various applications requiring high-speed data transmission over long cables, including:
- Point-to-point and multipoint data bus systems.
- Industrial automation and control systems.
- Automotive communication systems.
- Telecommunications equipment.
- Network interfaces and data communication equipment.
Q & A
- What is the operating temperature range of the SN65LBC179QDG4?
The SN65LBC179QDG4 operates over the extended industrial or automotive temperature range of −40°C to 125°C. - What is the supply voltage for the SN65LBC179QDG4?
The supply voltage is 4.75 V to 5.25 V. - What is the maximum pulse width the SN65LBC179QDG4 can handle?
The device can operate with pulse widths as low as 30 ns. - Does the SN65LBC179QDG4 meet industry standards for differential communication?
Yes, it meets or exceeds the requirements of ANSI RS-485 and ISO 8482:1987(E). - What kind of protection does the SN65LBC179QDG4 offer against line faults?
The device provides positive- and negative-output current limiting and thermal shutdown protection. - What is the common-mode voltage range of the SN65LBC179QDG4?
The common-mode voltage range is −7 V to 12 V. - Is the SN65LBC179QDG4 pin compatible with other devices?
Yes, it is pin compatible with the SN75179B. - What type of ESD protection does the SN65LBC179QDG4 have?
The device has bus-pin ESD protection that exceeds 12 kV HBM. - What is the maximum junction temperature for the SN65LBC179QDG4?
The maximum junction temperature is approximately 172°C. - What are the typical propagation delay times for the SN65LBC179QDG4?
The propagation delay times (tPHL, tPLH) are typically 30 ns.
