Overview
The SN65LBC179QD, 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 monolithic integrated circuits are optimized for bidirectional data communication and are compatible with industry standards such as ANSI RS-485 and ISO 8482:1987(E). The SN65LBC179QD combines a differential line driver and a differential line receiver, operating from a single 5-V supply. It features TI’s proprietary LinBiCMOS™ technology, which integrates the low power consumption of CMOS and the precision and robustness of bipolar transistors.
Key Specifications
| Parameter | Min | Typ | 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 |
| Common-Mode Voltage Range | -7 | - | 12 | V |
| High-Level Output Current, IOH | -60 | - | - | mA |
| Low-Level Output Current, IOL | 60 | - | - | mA |
| Propagation Delay Time (tPHL) | 15 | 30 | - | ns |
| Propagation Delay Time (tPLH) | 15 | 30 | - | ns |
| Pulse Skew (tsk(p)) | 3 | 6 | - | ns |
| Transition Time (tt) | 3 | 5 | - | ns |
| Junction Temperature, TJ | - | - | 172 | °C |
| Operating Free-Air Temperature, TA | -40 | - | 125 | °C |
Key Features
- Designed for high-speed multipoint data transmission over long cables 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).
- 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 differential outputs and receiver differential inputs.
- Bus-pin ESD protection exceeds 12 kV HBM.
Applications
The SN65LBC179QD 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 systems requiring robust and reliable data communication.
- Telecommunications and networking equipment.
- Any application requiring compliance with ANSI RS-485 and ISO 8482:1987(E) standards.
Q & A
- What is the primary function of the SN65LBC179QD?
The SN65LBC179QD is a differential line driver and receiver pair designed for high-speed multipoint data transmission over long cables.
- What are the operating temperature ranges for the SN65LBC179QD?
The SN65LBC179QD operates over an extended industrial or automotive temperature range of -40°C to 125°C.
- What is the maximum supply current of the SN65LBC179QD?
The maximum supply current is 5 mA.
- Does the SN65LBC179QD meet industry standards for data communication?
Yes, it meets or exceeds the requirements of ANSI RS-485 and ISO 8482:1987(E).
- What is the common-mode voltage range of the SN65LBC179QD?
The common-mode voltage range is -7 V to 12 V.
- What protection features does the SN65LBC179QD have?
The device features positive- and negative-output current limiting and driver thermal shutdown protection.
- Is the SN65LBC179QD pin compatible with other devices?
Yes, it is pin compatible with the SN75179B.
- What is the significance of LinBiCMOS™ technology in the SN65LBC179QD?
LinBiCMOS™ technology combines the low power consumption of CMOS with the precision and robustness of bipolar transistors.
- What is the maximum junction temperature for the SN65LBC179QD?
The maximum junction temperature is approximately 172°C.
- What type of ESD protection does the SN65LBC179QD offer?
The device offers bus-pin ESD protection that exceeds 12 kV HBM.
- In what types of packages is the SN65LBC179QD available?
The device is available in 8-pin dual-in-line and small-outline packages.
