Texas Instruments' THVD1429 half-duplex RS-485 transceiver features integrated surge protection achieved by integrating transient voltage suppressor (TVS) diodes in a standard 8-pin SOIC (D) package. This feature provides a substantial increase in reliability for better immunity to noise transients coupled to the data cable eliminating the need for external protection components.
The device operates from a single 3.3 V or 5 V supply. The THVD1429 features a wide common-mode voltage range making it suitable for multi-point applications over long cable runs.
The THVD1429 device is available in the industry-standard SOIC package for easy drop-in without any PCB changes. The transceiver is characterized over ambient free-air temperatures from -40°C to +125°C.
Features
- Meets or exceeds the requirements of the TAI/EIA-485A standard
- Supply voltage: 3 V to 5.5 V
- Bus I/O protection:
- ±16 kV HBM ESD
- ±8 kV IEC 61000-4-2 contact discharge
- ±30 kV IEC 61000-4-2 air-gap discharge
- ±4 kV IEC 61000-4-4 electrical fast transient
- ±2.5 kV IEC 61000-4-5 1.2/50 µs surge
- Speed grade: 20 Mbps
- Extended ambient temperature range: -40°C to +125°C
- Extended operational common-mode range: ±12 V
- Receiver hysteresis for noise rejection: 30 mV
- Low power consumption:
- Standby supply current: <2 µA
- Current during operation: <3 mA
- Glitch-free power-up/power-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 controls
- Grid infrastructure
- Smart meters
- Process analytics
- Video surveillance
