Overview
The SN65LBC179QDR is a low-power differential line driver and receiver pair designed by Texas Instruments. This integrated circuit is optimized for high-speed multipoint data transmission over long cables, making it suitable for various industrial and automotive applications. The device operates using Texas Instruments’ proprietary LinBiCMOS™ technology, combining the low power consumption of CMOS with the precision and robustness of bipolar transistors. It is fully compliant with industry standards such as ANSI RS-485 and ISO 8482:1987(E), ensuring reliable and efficient data communication.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 4.75 to 5.25 | V |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | 8-SOIC (0.154", 3.90mm Width) | |
| Number of Drivers/Receivers | 1/1 | |
| Duplex Mode | Full | |
| Receiver Hysteresis | 45 mV | |
| Supply Current (No Load) | 4.2 to 7 mA | |
| Propagation Delay Time (High-to-Low, Low-to-High) | 15 to 30 ns | |
| Pulse Skew | 3 to 6 ns | |
| Transition Time | 3 to 5 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 for SN65LBC179 and SN75LBC179, 7 mA max for SN65LBC179Q.
- 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.
- Pin compatible with the SN75179B.
- Full-duplex operation with separate terminals for driver and receiver.
- Wide common-mode voltage range suitable for point-to-point or multipoint data bus applications.
Applications
The SN65LBC179QDR is suitable for a variety of applications, including:
- Industrial automation and control systems.
- Automotive systems requiring reliable data communication.
- Point-to-point and multipoint data bus systems.
- High-speed data transmission over long cables.
- Systems requiring compliance with ANSI RS-485 and ISO 8482:1987(E) standards.
Q & A
- What is the primary function of the SN65LBC179QDR?
The SN65LBC179QDR is a low-power differential line driver and receiver pair designed for high-speed multipoint data transmission over long cables.
- What are the operating temperature ranges for the SN65LBC179QDR?
The operating temperature range for the SN65LBC179QDR is -40°C to 125°C.
- What is the supply voltage range for the SN65LBC179QDR?
The supply voltage range is 4.75 V to 5.25 V.
- Is the SN65LBC179QDR compliant with industry standards?
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 SN65LBC179QDR?
The common-mode voltage range is −7 V to 12 V.
- Does the SN65LBC179QDR have thermal shutdown protection?
Yes, the driver has thermal shutdown protection at a junction temperature of approximately 172°C.
- What is the maximum supply current for the SN65LBC179QDR?
The maximum supply current is 7 mA for the SN65LBC179QDR.
- What is the propagation delay time for the SN65LBC179QDR?
The propagation delay time is 15 to 30 ns for both high-to-low and low-to-high transitions.
- Is the SN65LBC179QDR suitable for full-duplex operation?
Yes, it supports full-duplex operation with separate terminals for the driver and receiver.
- What package types are available for the SN65LBC179QDR?
The SN65LBC179QDR is available in an 8-pin SOIC package.
