Overview
The SN65HVD30DR is a 3.3-V full-duplex RS-485 driver and receiver integrated circuit produced by Texas Instruments. This device is designed for high-speed data transmission over long cable lengths, up to 1500 meters, and is suitable for various industrial and commercial applications. It operates with a 3.3-V power supply and features separate input and output pins for full-duplex bus communication designs. The SN65HVD30DR is part of the SN65HVD3x family, which includes several variants with different signaling rates and enable options.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 3 to 3.6 | V |
| Signaling Rate | 26 Mbps | Mbps |
| Differential Load Resistance | 54 to 60 | Ω |
| High-Level Input Voltage | 2 to VCC | V |
| Low-Level Input Voltage | 0 to 0.8 | V |
| Differential Input Voltage | -12 to 12 | V |
| High-Level Output Current (Driver) | -60 | mA |
| Low-Level Output Current (Driver) | 60 | mA |
| Junction Temperature | -40 to 150 | °C |
| Package Type | SOIC-8 | |
| Package Size | 4.90 mm × 3.91 mm |
Key Features
- 1/8 Unit-load option available, supporting up to 256 nodes on the bus
- Bus-pin ESD protection exceeds 15-kV HBM
- Optional driver output transition times for signaling rates of 1 Mbps, 5 Mbps, and 26 Mbps
- Low-current standby mode: less than 1 µA
- Glitch-free power-up and power-down protection for hot-plugging applications
- 5-V Tolerant inputs
- Bus idle, open, and short-circuit failsafe
- Driver current limiting and thermal shutdown
- Designed for RS-422 and RS-485 networks
Applications
- Utility meters
- DTE and DCE interfaces
- Industrial, process, and building automation
- Point-of-sale (POS) pins and networks
Q & A
- What is the primary function of the SN65HVD30DR?
The SN65HVD30DR is a 3.3-V full-duplex RS-485 driver and receiver, designed for high-speed data transmission over long cable lengths. - What is the maximum signaling rate of the SN65HVD30DR?
The maximum signaling rate is 26 Mbps. - What is the operating temperature range of the SN65HVD30DR?
The operating temperature range is from -40°C to 85°C. - Does the SN65HVD30DR have built-in ESD protection?
Yes, it has bus-pin ESD protection that exceeds 15-kV HBM. - What is the standby current of the SN65HVD30DR when disabled?
The standby current is less than 1 µA when both the driver and receiver are disabled. - Is the SN65HVD30DR suitable for hot-plugging applications?
Yes, it features glitch-free power-up and power-down protection. - What types of networks is the SN65HVD30DR designed for?
The device is designed for RS-422 and RS-485 networks. - How many nodes can be supported on the bus with the SN65HVD30DR?
Up to 256 nodes can be supported with the 1/8 unit-load option. - What is the package type and size of the SN65HVD30DR?
The package type is SOIC-8, and the size is 4.90 mm × 3.91 mm. - What are some common applications of the SN65HVD30DR?
Common applications include utility meters, DTE and DCE interfaces, industrial automation, and point-of-sale networks.
