Overview
The SN65HVD485E device, produced by Texas Instruments, is a half-duplex transceiver specifically 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 transceiver is suitable for data transmission rates up to 10 Mbps over long twisted-pair cables and is characterized by its low supply current, typically less than 2 mA, exclusive of the load. The device features a high degree of ESD protection and low standby current consumption, making it ideal for various demanding applications.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 5 V |
| Data Transmission Rate | Up to 10 Mbps |
| Number of Nodes on Bus | Up to 64 |
| ESD Protection | ±15 kV Human Body Model (HBM) |
| Supply Current (Active) | Typically less than 2 mA |
| Supply Current (Shutdown) | Below 1 mA |
| Operating Temperature | –40°C to 85°C |
| Package Options | SOIC (8), VSSOP (8), PDIP (8) |
| Package Size (VSSOP) | 3.00 mm × 3.00 mm |
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
- Typical hysteresis of 30 mV to improve noise immunity
- Thermal-shutdown function for protection against system-fault conditions
Applications
- Motor control
- Power inverters
- Industrial automation
- Building automation networks
- Industrial process control
- Battery-powered applications
- Telecommunications equipment
- Electrical inverters
- Status/command signals across telecom racks
- Cabled chassis interconnects
Q & A
- What is the SN65HVD485E device used for? The SN65HVD485E is a half-duplex transceiver designed for RS-485 data bus networks.
- What is the maximum data transmission rate of the SN65HVD485E? The device supports data transmission rates up to 10 Mbps.
- How many nodes can be connected on a bus using the SN65HVD485E? Up to 64 nodes can be connected on a bus.
- What level of ESD protection does the SN65HVD485E offer? The device offers ±15 kV Human Body Model (HBM) ESD protection.
- What are the operating temperature ranges for the SN65HVD485E? The device operates from –40°C to 85°C.
- What are the available package options for the SN65HVD485E? The device is available in SOIC (8), VSSOP (8), and PDIP (8) packages.
- Does the SN65HVD485E have any thermal protection features? Yes, it features a thermal-shutdown function to protect against system-fault 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 in active mode? The typical supply current is less than 2 mA, exclusive of the load.
- What is the standby current consumption of the SN65HVD485E in shutdown mode? The standby current drops below 1 mA in shutdown mode.
