Overview
The SN65HVD77DGKR is a 3.3-V full-duplex RS-485 transceiver produced by Texas Instruments. This device is part of the SN65HVD7x family, which is designed to provide robust and reliable communication in harsh operating environments. The SN65HVD77DGKR combines a differential driver and a differential receiver, operating from a single 3.3-V power supply, and is fully enabled with no external enabling pins. It features high levels of ESD protection, including > ±30-kV HBM and > ±12-kV IEC61000-4-2 contact discharge, making it suitable for a wide range of industrial and commercial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VSSOP (DGK) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage | 3.3 V | V |
| Data Rate | Up to 50 Mbps | - |
| ESD Protection | > ±30-kV HBM, > ±12-kV IEC61000-4-2 contact discharge | - |
| Quiescent Current | < 1.1 mA | mA |
| Standby Supply Current | 10 nA (typical), < 5 µA (maximum) | A |
| Receiver Hysteresis | 70 mV | mV |
Key Features
- Full-duplex operation with separate input and output pins for driver and receiver.
- 1/8 unit-load options available, supporting up to 256 nodes on the bus.
- High levels of ESD protection: > ±30-kV HBM and > ±12-kV IEC61000-4-2 contact discharge.
- Extended industrial temperature range: –40°C to 125°C.
- Large receiver hysteresis (70 mV) for noise rejection.
- Low power consumption: < 1.1-mA quiescent current during operation.
- Low standby supply current: 10 nA (typical), < 5 µA (maximum).
- 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.
Applications
The SN65HVD77DGKR is suitable for various applications requiring reliable and high-speed serial communication, including:
- Industrial automation and control systems.
- Building automation and control systems.
- Medical devices and equipment.
- Automotive systems, especially those requiring robust ESD protection.
- Multi-point applications over long cable runs.
Q & A
- What is the operating temperature range of the SN65HVD77DGKR?
The operating temperature range is from –40°C to 125°C.
- What is the data rate capability of the SN65HVD77DGKR?
The device can operate at data rates up to 50 Mbps.
- What level of ESD protection does the SN65HVD77DGKR offer?
The device offers > ±30-kV HBM and > ±12-kV IEC61000-4-2 contact discharge ESD protection.
- How many nodes can be supported on the bus with the SN65HVD77DGKR?
Up to 256 nodes can be supported on the bus.
- What is the quiescent current of the SN65HVD77DGKR during operation?
The quiescent current is less than 1.1 mA.
- Does the SN65HVD77DGKR require external enabling pins?
No, the SN65HVD77DGKR is fully enabled with no external enabling pins.
- What is the receiver hysteresis of the SN65HVD77DGKR?
The receiver hysteresis is 70 mV.
- Is the SN65HVD77DGKR compatible with 5-V logic inputs?
- What is the standby supply current of the SN65HVD77DGKR?
The standby supply current is 10 nA (typical), < 5 µA (maximum).
- Does the SN65HVD77DGKR support hot-plugging applications?
