Overview
The SN65HVD74DGK is a 3.3-V full-duplex RS-485 transceiver produced by Texas Instruments. This device is part of the SN65HVD7x family, which extends the RS-485 portfolio with robust drivers and receivers, offering high levels of ESD protection. The SN65HVD74DGK operates from a single 3.3-V power supply and is designed for full-duplex bus communication, making it suitable for various industrial and commercial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (Nominal) | 3.3 | V |
| Signaling Rate (Maximum) | 20 | Mbps |
| Common Mode Range | -7 to 12 | V |
| ESD Protection (HBM) | > ±30 kV | kV |
| ESD Protection (IEC 61000-4-2 Contact) | > ±12 kV | kV |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | VSSOP (DGK) | |
| Number of Pins | 8 | |
| Maximum Standby Current | < 5 µA | µA |
| Number of Nodes on the Bus | 256 |
Key Features
- Full-duplex operation with separate input and output pins for driver and receiver.
- High ESD protection: > ±30 kV HBM and > ±12 kV IEC 61000-4-2 contact discharge.
- Large receiver hysteresis for immunity to conducted differential noise.
- Wide operating temperature range: -40°C to 125°C.
- Glitch-free power-up and power-down protection for hot-plugging applications.
- 5-V tolerant logic inputs compatible with 3.3-V or 5-V controllers.
- Available in standard SOIC and small-footprint MSOP packages.
Applications
- E-meters
- Industrial Automation
- Building Automation
- Security and Surveillance
- Encoders and Decoders
Q & A
- What is the nominal supply voltage for the SN65HVD74DGK?
The nominal supply voltage is 3.3 V.
- What is the maximum signaling rate of the SN65HVD74DGK?
The maximum signaling rate is 20 Mbps.
- What level of ESD protection does the SN65HVD74DGK offer?
The device offers > ±30 kV HBM and > ±12 kV IEC 61000-4-2 contact discharge ESD protection.
- What is the operating temperature range of the SN65HVD74DGK?
The operating temperature range is -40°C to 125°C.
- How many nodes can be connected on the bus using the SN65HVD74DGK?
Up to 256 nodes can be connected on the bus.
- What types of packages are available for the SN65HVD74DGK?
The device is available in standard SOIC and small-footprint MSOP (DGK) packages.
- Does the SN65HVD74DGK support full-duplex operation?
Yes, it supports full-duplex operation with separate input and output pins for driver and receiver.
- Is the SN65HVD74DGK suitable for hot-plugging applications?
Yes, it features glitch-free power-up and power-down protection for hot-plugging applications.
- What is the maximum standby current of the SN65HVD74DGK?
The maximum standby current is less than 5 µA.
- Are the logic inputs of the SN65HVD74DGK compatible with 5-V controllers?
Yes, the logic inputs are 5-V tolerant and compatible with 3.3-V or 5-V controllers.
