THVD1429DR

The THVD1419 and THVD1429 are half-duplex RS-485 transceivers with integrated surge protection. Surge protection is achieved by integrating transient voltage suppressor (TVS) diodes within the standard 8-pin SOIC(D) package. This feature significantly improves reliability against noise transients coupled onto data cables, eliminating the need for external protection components. Each device operates from a single 3.3V or 5V supply. The wide common-mode voltage range of devices in this family makes them well suited for long-cable applications. The THVD1419 and THVD1429 devices are available in industry-standard SOIC packages, enabling easy drop-in replacement without PCB modifications. These devices are rated for operation from −40°C to 125°C in still-air environments.

Applications

• Wireless infrastructure
• Building automation
• HVAC systems
• Factory automation and control
• Power grid infrastructure
• Smart metering
• Process analysis
• Video surveillance

Key features

• Meets or exceeds TIA/EIA-485A standard requirements
• 3V to 5.5V 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
• Two speed grades:
• THVD1419: 250kbps
• THVD1429: 20Mbps
• Extended ambient temperature range: -40°C to 125°C
• Extended operating common-mode range: ±12V
• Receiver hysteresis for noise suppression: 30mV
• Low power consumption:
• Standby supply current: <2μA
• Operating current: <3mA
• Glitch-free power-up/power-down for hot-plug capability
• Open, short, and idle bus failsafe protection
• 1/8 unit load (up to 256 bus nodes)
• Industry-standard 8-pin SOIC package for drop-in compatibility