Overview
The SN65LBC179DRG4, produced by Texas Instruments, is a low-power differential line driver and receiver pair designed for high-speed multipoint data transmission over long cables. This integrated circuit is part of the SN65LBC179 family, which includes the SN65LBC179, SN65LBC179Q, and SN75LBC179. These devices are monolithic, balanced, or differential, voltage mode ICs that meet or exceed the requirements of industry standards ANSI RS-485 and ISO 8482:1987(E). They are fabricated using TI’s proprietary LinBiCMOS™ technology, combining the low power consumption of CMOS with the precision and robustness of bipolar transistors.
The SN65LBC179DRG4 operates from a single 5-V supply and is available in 8-pin SOIC and PDIP packages. It features a wide common-mode voltage range, making it suitable for point-to-point or multipoint data bus applications. The device includes positive and negative current limiting and thermal shutdown protection, enhancing its reliability in various operating conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage Range | -0.3 | 7 | V | |
| Operating Temperature Range (SN65LBC179DRG4) | -40 | 125 | °C | |
| Junction Temperature | 140 | °C | ||
| Differential Output Voltage (RL = 54 Ω) | 1.1 | 2.2 | 5 | V |
| Supply Current (No Load) | 4.2 | 7 | mA | |
| Differential-Output Delay Time (RL = 54 Ω) | 7 | 18 | ns | |
| Propagation Delay Time (High-to-Low, Low-to-High) | 15 | 30 | 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.
- Pin compatible with the SN75179B.
- Available in 8-pin SOIC and PDIP packages.
Applications
The SN65LBC179DRG4 is suitable for a variety of applications, including:
- Point-to-point and multipoint data bus systems.
- Industrial control systems.
- Automotive systems (for the SN65LBC179Q variant).
- Telecommunications equipment.
- Any environment requiring reliable, high-speed data transmission over long cables.
Q & A
- What is the primary function of the SN65LBC179DRG4?
The SN65LBC179DRG4 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 SN65LBC179DRG4?
The SN65LBC179DRG4 operates over an extended industrial or automotive temperature range of −40°C to 125°C.
- What is the supply voltage range for the SN65LBC179DRG4?
The supply voltage range is from -0.3 V to 7 V.
- What is the maximum supply current for the SN65LBC179DRG4?
The maximum supply current is 7 mA.
- Does the SN65LBC179DRG4 meet industry standards for RS-485?
Yes, it meets or exceeds the standard requirements of ANSI RS-485 and ISO 8482:1987(E).
- What is the common-mode voltage range of the SN65LBC179DRG4?
The common-mode voltage range is from −7 V to 12 V.
- What kind of protection does the SN65LBC179DRG4 have?
The device features positive and negative output current limiting and thermal shutdown protection.
- In what packages is the SN65LBC179DRG4 available?
The device is available in 8-pin SOIC and PDIP packages.
- What is the minimum pulse width the SN65LBC179DRG4 can operate with?
The device can operate with pulse widths as low as 30 ns.
- Is the SN65LBC179DRG4 pin compatible with other devices?
Yes, it is pin compatible with the SN75179B.
