Overview
The SN65HVD485E, produced by Texas Instruments, is a half-duplex RS-485 transceiver designed for use in 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 | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | -0.5 | 5 | 7 | V |
| Operating Temperature (TA) | -40 | 85 | °C | |
| Junction Temperature (TJ) | -40 | 130 | °C | |
| Signaling Rate | 0 | 10 | Mbps | |
| Differential Input Voltage (VID) | -12 | 12 | V | |
| Differential Load Resistance (RL) | 54 | 60 | Ω | |
| Driver Output Current (IO) | -60 | 60 | mA | |
| Receiver Output Current (IO) | -8 | 8 | mA | |
| ESD Protection | ±15 kV | |||
| Supply Current (ICC) | 2 | mA |
Key Features
- Bus-pin ESD protection up to ±15 kV
- Half-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
- Thermal shutdown function to protect the device from system-fault conditions
- Internal biasing of the receiver input thresholds for open-circuit, bus-idle, or short-circuit failsafe conditions
Applications
- Motor control
- Power inverters
- Industrial automation
- Building automation networks
- Industrial process control
- Battery-powered applications
- Telecommunications equipment
Q & A
- What is the SN65HVD485E used for?
The SN65HVD485E is a half-duplex RS-485 transceiver used for asynchronous data transmissions in RS-485 data bus networks. - What is the maximum signaling rate of the SN65HVD485E?
The maximum signaling rate is 10 Mbps. - What is the operating temperature range of the SN65HVD485E?
The operating temperature range is from -40°C to 85°C. - How many nodes can be connected to the bus using the SN65HVD485E?
Up to 64 nodes can be connected to the bus. - What is the ESD protection level of the SN65HVD485E?
The ESD protection level is up to ±15 kV. - 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, it features a thermal shutdown function to protect the device from system-fault conditions. - How does the receiver failsafe mechanism work in the SN65HVD485E?
The receiver outputs a failsafe logic-high state in cases of open bus, shorted bus, or idle bus conditions. - What is the typical supply current of the SN65HVD485E?
The typical supply current is less than 2 mA. - Is the SN65HVD485E compliant with industry standards?
Yes, it meets or exceeds the requirements of the TIA/EIA-485A standard.
