Overview
The SN65HVD3082ED is a low-power RS-485 transceiver designed by Texas Instruments. It is part of the SNx5HVD308xE family, which includes half-duplex transceivers optimized for RS-485 data bus networks. These devices are powered by a 5-V supply and are fully compliant with the TIA/EIA-485A standard. They are suitable for transmitting data over long twisted-pair cables due to their controlled transition times.
The SN65HVD3082ED is particularly optimized for signaling rates up to 200 kbps, making it ideal for applications requiring reliable and efficient data transmission. The device operates with very low supply current, typically 0.3 mA, and drops to a few nanoamps in shutdown mode, which is beneficial for power-sensitive applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.5 | 5.5 | 5.5 | V |
| Input Voltage at Any Bus Terminal (VI) | -7 | 12 | 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 | |
| Output Current (IO) - Driver | -60 | 60 | mA | |
| Output Current (IO) - Receiver | -8 | 8 | mA | |
| Signaling Rate | 0.2 | Mbps | ||
| Operating Free-Air Temperature (TA) | -40 | 85 | °C | |
| Junction Temperature (TJ) | -40 | 130 | °C |
Key Features
- Meets or exceeds the requirements of the TIA/EIA-485A standard.
- Low quiescent power: 0.3 mA in active mode and 1 nA in shutdown mode.
- 1/8 unit load, allowing up to 256 nodes on a bus.
- Bus-pin ESD protection up to 15 kV.
- Industry-standard SN75176 footprint.
- Fail-safe receiver (bus open, bus shorted, bus idle).
- Glitch-free power-up and power-down bus inputs and outputs.
- Power-on reset circuits keep outputs in a high-impedance state until supply voltage stabilizes.
- Thermal shutdown function to protect the device from system fault conditions.
Applications
- Energy meter networks.
- Motor control.
- Power inverters.
- Industrial automation.
- Building automation networks.
- Battery-powered applications.
- Telecommunications equipment.
- Cabled chassis interconnects.
Q & A
- What is the primary function of the SN65HVD3082ED?
The SN65HVD3082ED is a half-duplex RS-485 transceiver designed for RS-485 data bus networks.
- What is the signaling rate of the SN65HVD3082ED?
The SN65HVD3082ED is optimized for signaling rates up to 200 kbps.
- What is the typical supply current of the SN65HVD3082ED in active mode?
The typical supply current is 0.3 mA in active mode.
- What is the supply current in shutdown mode?
The supply current drops to a few nanoamps in shutdown mode.
- What is the operating temperature range for the SN65HVD3082ED?
The operating temperature range is from -40°C to 85°C.
- What kind of ESD protection does the SN65HVD3082ED offer?
The device offers bus-pin ESD protection up to 15 kV.
- Is the SN65HVD3082ED compatible with the TIA/EIA-485A standard?
Yes, it meets or exceeds the requirements of the TIA/EIA-485A standard.
- What is the maximum number of nodes that can be connected to the bus using the SN65HVD3082ED?
Up to 256 nodes can be connected to the bus.
- What are some common applications for the SN65HVD3082ED?
Common applications include energy meter networks, motor control, power inverters, industrial automation, and telecommunications equipment.
- Does the SN65HVD3082ED have any thermal protection features?
Yes, it has a thermal shutdown function to protect the device from system fault conditions.
