Overview
The SN65HVD1477DGK is a 3.3-V full-duplex RS-485 transceiver from Texas Instruments, part of the SN65HVD147x family. This device is renowned for its high ESD protection, robust 3.3-V drivers and receivers, and wide operating temperature range. It is available in a small-footprint MSOP package, making it suitable for applications requiring compact design. The SN65HVD1477DGK supports up to 256 nodes on the bus and features glitch-free power-up and power-down protection, making it ideal for hot-plugging applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 3 to 3.6 | V |
| Input Voltage at Bus Pins | -7 to 12 | V |
| High-Level Input Voltage (VIH) | 2 to VCC | V |
| Low-Level Input Voltage (VIL) | 0 to 0.8 | V |
| Differential Input Voltage (VID) | -12 to 12 | V |
| Output Current, Driver (IO) | -60 to 60 | mA |
| Output Current, Receiver (IO) | -8 to 8 | mA |
| Differential Load Resistance (RL) | 54 to 60 | Ω |
| Differential Load Capacitance (CL) | 50 | pF |
| Signaling Rate | Up to 50 Mbps | |
| Operating Temperature Range | -40 to 125 | °C |
| Junction Temperature (TJ) | -40 to 125 | °C |
| Package Type | MSOP-8 |
Key Features
- High ESD protection: ±16-kV IEC61000-4-2 contact discharge and > ±30-kV HBM ESD protection.
- Up to 256 nodes on the bus.
- 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.
- Signaling rate options optimized for 50 Mbps.
- No external enabling pins required for SN65HVD1477.
Applications
- Industrial Automation
- Encoders and Decoders
- Building Automation
- Security and Surveillance Networks
- Telecommunications
Q & A
- What is the operating voltage range of the SN65HVD1477DGK? The operating voltage range is 3 to 3.6 V.
- What is the maximum signaling rate supported by the SN65HVD1477DGK? The maximum signaling rate is up to 50 Mbps.
- What is the temperature range for the SN65HVD1477DGK? The operating temperature range is -40°C to 125°C.
- Does the SN65HVD1477DGK require external enabling pins? No, the SN65HVD1477 does not require external enabling pins.
- What is the ESD protection level of the SN65HVD1477DGK? It offers ±16-kV IEC61000-4-2 contact discharge and > ±30-kV HBM ESD protection.
- What is the typical standby current of the SN65HVD1477DGK? The typical standby current is 10 nA, with a maximum of < 5 µA.
- Is the SN65HVD1477DGK compatible with 5-V logic inputs? Yes, it is 5-V tolerant.
- How many nodes can be supported on the bus with the SN65HVD1477DGK? Up to 256 nodes can be supported.
- What package types are available for the SN65HVD1477? It is available in an MSOP-8 package.
- What is the differential load resistance range for the SN65HVD1477DGK? The differential load resistance range is 54 to 60 Ω.
