Overview
The SN65HVD485E, produced by Texas Instruments, is a half-duplex transceiver designed for RS-485 data bus networks. It operates on a 5-V supply and is fully compliant with the TIA/EIA-485A standard. This device is suitable for data transmission up to 10 Mbps over long twisted-pair cables and is characterized by 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. The device is available in various packages, including SOIC, VSSOP, and PDIP, and matches the industry-standard footprint of the SN75176 device.
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 | |
| Number of Nodes on a Bus | Up to 64 |
Key Features
- Bus-pin ESD protection up to 15 kV
- Half-unit load, supporting 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, SOIC-8, and PDIP-8 packages
- 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 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.
- How many nodes can be supported on a bus by the SN65HVD485E?
The device supports up to 64 nodes on a bus.
- What is the operating temperature range of the SN65HVD485E?
The device operates from –40°C to 85°C air temperature.
- What level of ESD protection does the SN65HVD485E offer?
The device offers bus-pin ESD protection up to 15 kV.
- What packages is the SN65HVD485E available in?
The device is available in SOIC-8, VSSOP-8, and PDIP-8 packages.
- Does the SN65HVD485E meet 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.
- Does the SN65HVD485E have any failsafe features?
Yes, it features a bus-open-failsafe receiver and internal biasing of the receiver input thresholds for failsafe conditions.
- Is the SN65HVD485E protected against thermal faults?
Yes, it includes a thermal shutdown function to protect the device from system-fault conditions.
