Texas Instruments THVD24x9 Half-Duplex RS-485 Transceivers
Texas Instruments THVD24x9 Half-Duplex RS-485 Transceivers come with integrated surge protection, achieved by integrating transient voltage suppressor (TVS) diodes in the standard 8-pin SOIC and the small 10-pin VSON package. This feature increases reliability by providing better immunity to noise transients coupled to the data cable, eliminating the need for external protection components.
Texas Instruments THVD2419 is in the standard pin-out SOIC package and operates from a single 3.3V or 5V supply. In addition, THVD2429 comes in a 10-pin VSON package to support an additional VIO supply to operate the IOs from as low as 1.65V supply level. Each device has a wide common-mode voltage range, making it suitable for multi-point applications over long cable runs.
Features
- Meets or exceeds the requirements of the TIA/EIA-485A standard
- 3V to 5.5V supply voltage
- A small surge-integrated RS-485 device in a 9mm2 package
- Bus I/O protection
- ±3kV/42Ω IEC 61000-4-5 1.2/50µs surge (SOIC)
- ±1.5kV/42Ω IEC 61000-4-5 1.2/50µs surge (VSON)
- ±8kV IEC 61000-4-2 contact discharge
- ±4kV IEC 61000-4-4 electrical fast transient
- ±15kV HBM ESD
- ±42V DC bus fault
- Available in two-speed grades
- THVD2419: 250kbps
- THVD2429: 20Mbps
- VIO support from 1.65V to VCC supply level
- -40°C to 125°C extended ambient temperature range
- ±25V extended operational common-mode range
- Large receiver hysteresis for noise rejection
- < 5µA low power consumption in shutdown mode
- Glitch-free power-up and 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
- Small surge-integrated RS-485 device in 3mm x 3mm leadless (VSON) package
Applications
- Wireless infrastructure
- Factory automation
- Motor drives
- Building automation
- HVAC
- Grid infrastructure
Additional Resources
Block Diagrams
Inilathala: 2024-09-18
| Na-update: 2025-04-10