Overview
The SN75LBC180DRG4 is a low-power RS-485 line driver and receiver pair produced by Texas Instruments. This monolithic integrated circuit is designed for bidirectional data communication over long cables, adhering to the characteristics of transmission lines. It is a balanced, or differential, voltage mode device that meets or exceeds the requirements of industry standards ANSI RS-485 and ISO 8482:1987(E). The device utilizes TI's proprietary LinBiCMOS™ technology, combining the low-power consumption of CMOS with the precision and robustness of bipolar transistors.
Key Specifications
| Parameter | Minimum | Typical | Maximum | 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 (VO, VI, or VIC) | -7 | 12 | V | |
| High-Level Output Current (IOH) | -60 | mA | ||
| Low-Level Output Current (IOL) | 60 | mA | ||
| Operating Free-Air Temperature (TA) | 0 | 70 | °C | |
| Differential Output Delay Time (td(OD)) | 7 | 12 | 18 | ns |
| Differential Output Transition Time (tt(OD)) | 5 | 10 | 20 | ns |
Key Features
- Designed for high-speed multipoint data transmission over long cables.
- Operates with pulse durations as low as 30 ns.
- Low supply current: 5 mA maximum.
- Meets or exceeds the requirements of ANSI standard RS-485 and ISO 8482:1987(E).
- 3-State outputs for party-line buses.
- Common-mode voltage range of –7 V to 12 V.
- Thermal shutdown protection prevents driver damage from bus contention.
- Positive and negative output current limiting.
- Pin compatible with the SN75ALS180.
- Operates from a single 5-V supply.
- Active-high and active-low enables for direction control.
Applications
- Point-to-point or multipoint data-bus applications.
- Industrial automation and control systems.
- Remote sensors and data acquisition systems.
- Building automation and control systems.
- Any application requiring reliable, high-speed data transmission over long distances.
Q & A
- What is the primary function of the SN75LBC180DRG4?
The SN75LBC180DRG4 is a low-power RS-485 line driver and receiver pair designed for bidirectional data communication over long cables.
- What are the operating temperature ranges for the SN75LBC180DRG4?
The SN75LBC180DRG4 is characterized for operation over the commercial temperature range of 0°C to 70°C.
- What is the maximum supply current of the SN75LBC180DRG4?
The maximum supply current is 5 mA.
- Does the SN75LBC180DRG4 meet industry standards for RS-485 communication?
Yes, it meets or exceeds the requirements of ANSI standard RS-485 and ISO 8482:1987(E).
- What is the common-mode voltage range of the SN75LBC180DRG4?
The common-mode voltage range is –7 V to 12 V.
- Does the SN75LBC180DRG4 have thermal shutdown protection?
Yes, it has thermal shutdown protection to prevent driver damage from bus contention.
- What is the differential output delay time of the SN75LBC180DRG4?
The differential output delay time is between 7 ns and 18 ns.
- Is the SN75LBC180DRG4 pin compatible with other devices?
Yes, it is pin compatible with the SN75ALS180.
- How does the SN75LBC180DRG4 handle direction control?
The device has active-high and active-low enables that can be externally connected to function as a direction control.
- What are the typical applications of the SN75LBC180DRG4?
Typical applications include point-to-point or multipoint data-bus systems, industrial automation, remote sensors, and building automation.
