Overview
The SN65HVD20DRG4 is a high-performance RS-485 transceiver from Texas Instruments, designed to exceed the requirements of the TIA/EIA-485-A standard. This device is part of the SN65HVD2x family, which offers enhanced features such as extended common-mode voltage range, high ESD protection, and low standby supply current. The SN65HVD20DRG4 is particularly suited for applications requiring high signaling rates and robust performance in severe electrical environments.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.5 | 5 | 5.5 | V |
| Voltage at any bus I/O terminal (A, B) | -20 | 25 | V | |
| Operating Free-Air Temperature (TA) | -40 | 85 | °C | |
| Junction Temperature (TJ) | -40 | 130 | °C | |
| Differential Output Propagation Delay (tPLH) | 6 | 10 | 20 | ns |
| Differential Output Rise Time (tr) | 2 | 6 | 12 | ns |
| High-Level Output Voltage (VOH) | 4 | V | ||
| Low-Level Output Voltage (VOL) | 0.4 | V | ||
| Standby Supply Current | 1 | µA |
Key Features
- Extended common-mode voltage range (-20 V to 25 V), more than doubling the TIA/EIA-485 requirement.
- Receiver equalization to extend cable length and improve signaling rate.
- High ESD protection to over 16-kV HBM.
- Failsafe receiver for open-circuit, short-circuit, and idle-bus conditions.
- Low standby supply current of 1 µA (maximum).
- More than 100 mV receiver hysteresis.
- Controlled driver output slew rate to reduce high-frequency noise emissions.
- Support for up to 64 nodes at high signaling rates (up to 25 Mbps).
Applications
- Long cable solutions in factory automation, security networks, and building HVAC systems.
- Severe electrical environments such as electrical power inverters, industrial drives, and avionics.
Q & A
- What is the operating temperature range of the SN65HVD20DRG4?
The operating free-air temperature range is from -40°C to 85°C.
- What is the maximum common-mode voltage range for the SN65HVD20DRG4?
The common-mode voltage range is from -20 V to 25 V.
- How many nodes can the SN65HVD20DRG4 support?
The SN65HVD20DRG4 can support up to 64 nodes at high signaling rates.
- What is the maximum signaling rate of the SN65HVD20DRG4?
The maximum signaling rate is up to 25 Mbps).
- Does the SN65HVD20DRG4 have ESD protection?
Yes, it has ESD protection to over 16-kV HBM).
- What is the standby supply current of the SN65HVD20DRG4?
The standby supply current is 1 µA (maximum)).
- Does the SN65HVD20DRG4 support receiver equalization?
No, the SN65HVD20 does not have receiver equalization, but other models in the SN65HVD2x family do).
- What is the typical high-level output voltage of the SN65HVD20DRG4?
The typical high-level output voltage (VOH) is 4 V).
- What is the typical low-level output voltage of the SN65HVD20DRG4?
The typical low-level output voltage (VOL) is 0.4 V).
- What are some typical applications for the SN65HVD20DRG4?
Typical applications include long cable solutions in factory automation, security networks, and severe electrical environments such as electrical power inverters and industrial drives).
