Texas Instruments THVD1419/THVD1429 Half-Duplex RS-485 Transceivers
Texas Instruments THVD1419/THVD1429 Half-Duplex RS-485 Transceivers come with integrated surge protection. Surge protection is achieved by integrating transient voltage suppressor (TVS) diodes in the standard 8-pin SOIC package. This feature substantially increases reliability for better immunity to noise transients coupled with the data cable, eliminating the need for external protection components. Each Texas Instruments THVD1419/THVD1429 operates from a single 3.3V or 5.0V supply. The devices in this family feature a wide common-mode voltage range, making them suitable for multi-point applications over long cable runs.
Features
- Meets or exceeds the requirements of the TIA/EIA-485A Standard
- 3.3V to 5.0V supply voltage
- Bus I/O protection
- ±16kV HBM ESD
- ±8kV IEC 61000-4-2 contact discharge
- ±30kV IEC 61000-4-2 air-gap discharge
- ±4kV IEC 61000-4-4 electrical fast transient
- ±2.5kV IEC 61000-4-5 1.2/50µs surge
- Available in two-speed grades
- THVD1419: 250kbps
- THVD1429: 20Mbps
- Extended ambient temperature range of -40°C to 125°C
- ±12V extended operational common-mode range
- 30mV receiver hysteresis for noise rejection
- Low power consumption
- < 2µA standby supply current
- < 3mA current during operation
- Glitch-free power-up/down for hot plug-in capability
- Open, short, and idle bus failsafe
- 1/8 unit load (up to 256 bus nodes)
- Industry-standard 8-pin SOIC for drop-in compatibility
Applications
- Wireless infrastructure
- Building automation
- HVAC systems
- Factory automation and control
- Grid infrastructure
- Smart meters
- Process analytics
- Video surveillance
Functional Block Diagram
Related Development Tool
Texas Instruments RS485-HF-DPLX-EVM RS-485 Evaluation Module
Allows for the quick, easy, and accurate evaluation of TI's family of RS-485 products.
Published: 2019-03-12
| Updated: 2023-08-02