Overview
The SN65LBC179AD is a low-power differential line driver and receiver pair designed by Texas Instruments. This integrated circuit is optimized for high-speed data communication over long cables, making it suitable for various industrial and commercial applications. The device operates from a single 5-V supply and is compatible with ANSI standard TIA/EIA-485-A and ISO 8482:1987(E). It features high-speed LinBiCMOS™ circuitry, enabling signaling rates up to 30 Mbps, and includes several protection mechanisms such as bus-pin ESD protection and thermal shutdown.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.75 | 5 | 5.25 | V |
| High-Level Input Voltage (VIH) | 2 | - | VCC | V |
| Low-Level Input Voltage (VIL) | 0 | - | 0.8 | V |
| Differential Input Voltage (VID) | -12 | - | 12 | V |
| Voltage at Any Bus Terminal (VO) | -7 | - | 12 | V |
| High-Level Output Current (IOH) | -60 | - | -8 | mA |
| Low-Level Output Current (IOL) | 8 | - | 60 | mA |
| Operating Free-Air Temperature (TA) | -40 | - | 85 | °C |
| Supply Current (ICC) | 8.5 | - | 15 | mA |
Key Features
- High-speed low-power LinBiCMOS™ circuitry designed for signaling rates up to 30 Mbps.
- Bus-pin ESD protection exceeds 12 kV HBM.
- Very low disabled supply-current requirements: 700 μA Max.
- Common-mode voltage range of –7 V to 12 V.
- Low supply current: 15 mA Max.
- Compatible with ANSI standard TIA/EIA-485-A and ISO 8482:1987(E).
- Positive and negative output current limiting.
- Driver thermal shutdown protection.
Applications
The SN65LBC179AD 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.
- Telecommunications equipment.
- Automotive systems requiring robust data communication.
Q & A
- What is the operating voltage range of the SN65LBC179AD?
The SN65LBC179AD operates from a single 5-V supply, with a voltage range of 4.75 V to 5.25 V.
- What are the signaling rates supported by the SN65LBC179AD?
The device supports signaling rates up to 30 Mbps.
- What is the ESD protection level of the SN65LBC179AD?
The bus-pin ESD protection exceeds 12 kV HBM.
- What are the operating temperature ranges for the SN65LBC179AD?
The SN65LBC179AD is characterized over the industrial temperature range of –40°C to 85°C.
- Is the SN65LBC179AD compatible with any industry standards?
Yes, it is compatible with ANSI standard TIA/EIA-485-A and ISO 8482:1987(E).
- What protection mechanisms are built into the SN65LBC179AD?
The device includes positive and negative output current limiting and driver thermal shutdown protection.
- What is the typical supply current of the SN65LBC179AD?
The typical supply current is 8.5 mA, with a maximum of 15 mA.
- Can the SN65LBC179AD be used in multipoint data bus applications?
Yes, it is suitable for both point-to-point and multipoint data bus applications.
- What is the common-mode voltage range of the SN65LBC179AD?
The common-mode voltage range is –7 V to 12 V.
- How does the SN65LBC179AD handle line fault conditions?
The device provides positive- and negative-current limiting and thermal shutdown for protection from line fault conditions.
