Overview
The THVD1500D, produced by Texas Instruments, is a robust half-duplex RS-485 transceiver designed for industrial applications. This device meets or exceeds the requirements of the TIA/EIA-485A standard and the State Grid Corporation of China (SGCC) Part 11 Serial Communication Protocol RS-485 standard. It operates from a single 5-V supply and is characterized over an extended industrial temperature range of -40°C to 125°C. The THVD1500D is packaged in an industry-standard 8-pin SOIC package, ensuring drop-in compatibility. Its wide common-mode voltage range and low input leakage on bus pins make it suitable for multi-point applications over long cable runs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.5 | 5.5 | 5.5 | V |
| Bus Voltage Range | -18 | 18 | V | |
| Input Voltage Range (Logic Pins) | -0.3 | 5.7 | V | |
| Operating Ambient Temperature (TA) | -40 | 125 | °C | |
| Junction Temperature (TJ) | -40 | 150 | °C | |
| Signaling Rate | 500 | kbps | ||
| ESD Protection (IEC 61000-4-2 Contact Discharge) | ±8 kV | |||
| ESD Protection (IEC 61000-4-2 Air Gap Discharge) | ±10 kV | |||
| ESD Protection (IEC 61000-4-4 Fast Transient Burst) | ±2 kV | |||
| Quiescent Supply Current (Driver and Receiver Enabled) | 440 | 660 | µA | |
| Standby Supply Current | 0.1 | 1 | µA |
Key Features
- Meets or exceeds the requirements of the TIA/EIA-485A standard and the State Grid Corporation of China (SGCC) Part 11 Serial Communication Protocol RS-485 standard.
- Operates from a single 5-V supply.
- Half-duplex RS-422/RS-485 transceiver.
- Bus I/O protection: ±16 kV HBM ESD, ±8 kV IEC 61000-4-2 Contact Discharge, ±10 kV IEC 61000-4-2 Air Gap Discharge, and ±2 kV IEC 61000-4-4 Fast Transient Burst.
- Extended industrial temperature range: -40°C to 125°C.
- Large receiver hysteresis for noise rejection.
- Low power consumption: Low standby supply current (< 1 µA) and quiescent during operation (< 660 µA).
- Glitch-free power-up/down for hot plug-in capability.
- Open, short, and idle bus failsafe.
- 1/8 unit load options (up to 256 bus nodes).
- Low EMI at 500 kbps.
Applications
- Electricity meters (E-Meters).
- Inverters.
- HVAC systems.
- Video surveillance systems.
Q & A
- What is the operating supply voltage range of the THVD1500D?
The THVD1500D operates from a supply voltage range of 4.5 V to 5.5 V.
- What are the ESD protection levels of the THVD1500D?
The device offers ±16 kV HBM ESD, ±8 kV IEC 61000-4-2 Contact Discharge, ±10 kV IEC 61000-4-2 Air Gap Discharge, and ±2 kV IEC 61000-4-4 Fast Transient Burst ESD protection.
- What is the signaling rate of the THVD1500D?
The signaling rate of the THVD1500D is up to 500 kbps.
- What is the operating temperature range of the THVD1500D?
The device operates over an extended industrial temperature range of -40°C to 125°C.
- What type of package is the THVD1500D available in?
The THVD1500D is available in an 8-pin SOIC package.
- Does the THVD1500D support hot plug-in capability?
Yes, the THVD1500D has glitch-free power-up/down for hot plug-in capability.
- What are some common applications of the THVD1500D?
Common applications include electricity meters, inverters, HVAC systems, and video surveillance systems.
- How many bus nodes can the THVD1500D support?
The device supports up to 256 bus nodes with 1/8 unit load options.
- Does the THVD1500D have built-in failsafe mechanisms?
Yes, the device has open, short, and idle bus failsafe mechanisms.
- What is the quiescent supply current of the THVD1500D when both the driver and receiver are enabled?
The quiescent supply current is less than 660 µA when both the driver and receiver are enabled.
