Overview
The SN65HVD78DGKR is a low-power, half-duplex RS-485 transceiver produced by Texas Instruments. This device is part of the SN65HVD7x family, which is designed for high-speed data transmission up to 50 Mbps. It operates from a single 3.3-V power supply and is suitable for demanding industrial applications due to its robust ESD protection and wide ambient temperature range from –40°C to 125°C. The transceiver features internal ESD protection circuits, large receiver hysteresis for noise rejection, and low power consumption, making it an ideal choice for various industrial and telecommunications applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Signaling Rate | Up to 50 Mbps | - |
| Supply Voltage | 3.3 V to 3.6 V | V |
| Package Type | VSSOP (8-pin) | - |
| Body Size | 3.00 mm × 3.00 mm | mm |
| Operating Temperature Range | –40°C to 125°C | °C |
| ESD Protection | ±12 kV (Human-Body Model), ±4 kV (IEC 61000-4-4 Fast Transient Burst) | kV |
| Receiver Hysteresis | 80 mV | mV |
| Quiescent Supply Current | < 1 mA | mA |
| Standby Supply Current | < 2 µA | µA |
| Driver Differential Output Rise/Fall Time | 1 ns to 6 ns | ns |
| Receiver Propagation Delay Time | 60 ns to 70 ns | ns |
Key Features
- Robust 3.3-V drivers and receivers with high ESD protection (±12 kV Human-Body Model, ±4 kV IEC 61000-4-4 Fast Transient Burst)
- Extended industrial temperature range from –40°C to 125°C
- Large receiver hysteresis (80 mV) for noise rejection
- Low unit-loading allows over 200 connected nodes
- Low power consumption with quiescent supply current < 1 mA and standby supply current < 2 µA
- 5-V tolerant logic inputs compatible with 3.3-V or 5-V controllers
- Glitch-free power-up and power-down bus inputs and outputs
- Internal biasing of receiver input thresholds with large input threshold hysteresis
Applications
- Factory Automation
- Telecommunications Infrastructure
- Motion Control
- Multi-point applications over long cable runs
Q & A
- What is the maximum signaling rate of the SN65HVD78DGKR?
The SN65HVD78DGKR supports signaling rates up to 50 Mbps.
- What is the operating temperature range of the SN65HVD78DGKR?
The device operates over a temperature range from –40°C to 125°C.
- What type of ESD protection does the SN65HVD78DGKR offer?
The device offers ±12 kV Human-Body Model and ±4 kV IEC 61000-4-4 Fast Transient Burst ESD protection.
- How many nodes can be connected using the SN65HVD78DGKR?
The device allows over 200 connected nodes due to its low unit-loading.
- What is the quiescent supply current of the SN65HVD78DGKR?
The quiescent supply current is less than 1 mA.
- Is the SN65HVD78DGKR compatible with 5-V logic controllers?
- What is the receiver hysteresis of the SN65HVD78DGKR?
The receiver hysteresis is 80 mV.
- Does the SN65HVD78DGKR have glitch-free power-up and power-down?
- What are the typical applications of the SN65HVD78DGKR?
The device is typically used in factory automation, telecommunications infrastructure, motion control, and multi-point applications over long cable runs.
- What is the package type of the SN65HVD78DGKR?
The device is available in an 8-pin VSSOP package.
