Texas Instruments' THVD1451 is a noise-immune RS-485 transceiver that is designed to operate in rugged industrial environments. The bus pins of this device are robust to high levels of IEC electrical fast transients (EFT) and IEC electrostatic discharge (ESD) events, eliminating the need for additional system-level protection components.
The transceiver operates from a single supply between 3 V and 5.5 V. The THVD1451 features an extended common-mode voltage range making it suitable for multi-point applications over long cable runs.
The THVD1451 transceiver is available in small VSON package for space-constrained applications. The device is characterized over the ambient free-air temperature range of -40°C to +125°C.
Features
- Meets/exceeds the requirements of the TIA/EIA-485A standard
- Supply voltage range: 3 V to 5.5 V
- Differential output exceeds 2.1 V for PROFIBUS compatibility with 5 V supply
- Bus I/O ESD protection:
- HBM: ±30 kV
- Contact discharge: ±18 kV IEC 61000-4-2
- Air-gap discharge: ±25 kV IEC 61000-4-2
- Fast transient burst: ±4 kV IEC 61000-4-4
- Extended operational common-mode range: ±15 V
- Low EMI 500 kbps and 50 Mbps data rates
- Large receiver hysteresis for noise rejection
- Low power consumption:
- Standby supply current: <1 µA
- Current during operation: <3 mA
- Extended ambient temperature range: -40°C to +125°C
- 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)
- Small-size VSON package saves board space
Applications
- Motor drives
- Factory automation and controls
- Grid infrastructure
- Building automation
- HVAC systems
- Video surveillance
- Process analytics
- Wireless infrastructure
