Overview
The SN65HVD485E, produced by Texas Instruments, is a half-duplex transceiver designed for RS-485 data bus networks. This device is powered by a 5-V supply and is fully compliant with the TIA/EIA-485A standard. It is suitable for data transmission up to 10 Mbps over long twisted-pair cables and operates with very low supply current, typically less than 2 mA, exclusive of the load. The SN65HVD485E features a wide common-mode range and high ESD protection levels, making it suitable for demanding applications such as electrical inverters, industrial automation networks, and telecommunications equipment.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | -0.5 to 7 | V |
| Voltage Range at A or B | -9 to 14 | V |
| Voltage Range at any Logic Pin | -0.3 to VCC + 0.3 | V |
| Receiver Output Current | -24 to 24 | mA |
| Signaling Rate | 0 to 10 | Mbps |
| Operating Free-Air Temperature | -40 to 85 | °C |
| Junction Temperature | -40 to 130 | °C |
| ESD Protection | ±15 kV | |
| Package Types | SOIC (8), VSSOP (8), PDIP (8) |
Key Features
- Bus-pin ESD protection up to 15 kV
- 1/2 Unit load: up to 64 nodes on a bus
- Bus-open-failsafe receiver
- Glitch-free power-up and power-down bus inputs and outputs
- Available in small VSSOP-8 package
- Meets or exceeds the requirements of the TIA/EIA-485A standard
- Industry-standard SN75176 footprint
- Internal biasing of the receiver input thresholds for open-circuit, bus-idle, or short-circuit failsafe conditions
- Thermal shutdown function to protect the device from damage due to system-fault conditions
Applications
- Motor control
- Power inverters
- Industrial automation
- Building automation networks
- Industrial process control
- Battery-powered applications
- Telecommunications equipment
- Cabled chassis interconnects
Q & A
- What is the SN65HVD485E used for?
The SN65HVD485E is a half-duplex transceiver designed for RS-485 data bus networks, suitable for various applications including motor control, power inverters, and industrial automation.
- What is the signaling rate of the SN65HVD485E?
The SN65HVD485E supports data transmission up to 10 Mbps.
- What is the ESD protection level of the SN65HVD485E?
The SN65HVD485E has bus-pin ESD protection up to 15 kV.
- How many nodes can be supported on a bus with the SN65HVD485E?
The device supports up to 64 nodes on a bus.
- What are the operating temperature ranges for the SN65HVD485E?
The device operates from -40°C to 85°C air temperature.
- What types of packages are available for the SN65HVD485E?
The device is available in SOIC (8), VSSOP (8), and PDIP (8) packages.
- Does the SN65HVD485E have thermal shutdown protection?
Yes, the device features a thermal shutdown function to protect it from damage due to system-fault conditions.
- How does the SN65HVD485E handle bus-open, bus-idle, or short-circuit conditions?
The device has internal biasing of the receiver input thresholds for open-circuit, bus-idle, or short-circuit failsafe conditions.
- Is the SN65HVD485E compliant with any industry standards?
Yes, it meets or exceeds the requirements of the TIA/EIA-485A standard.
- What is the typical supply current of the SN65HVD485E?
The typical supply current is less than 2 mA, exclusive of the load, and drops below 1 mA in the inactive shutdown mode.
