Overview
The THVD1429DT is a 3.3-V to 5-V RS-485 transceiver with integrated surge protection, designed and manufactured by Texas Instruments. This half-duplex transceiver is part of the THVD14x9 family and is known for its robust protection features and wide operational range. It operates from a single 3.3 V or 5 V supply and is packaged in an industry-standard 8-pin SOIC (D) package, ensuring easy drop-in compatibility without any PCB changes. The device is characterized over an ambient temperature range of -40°C to 125°C, making it suitable for various industrial and commercial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 3 V to 5.5 V | V |
| Data Rate | 20 Mbps | bps |
| Ambient Temperature Range | -40°C to 125°C | °C |
| Common-Mode Range | ± 12 V | V |
| Driver Differential Output Voltage | 1.5 V to 3.5 V | V |
| Propagation Delay | 12 ns to 25 ns | ns |
| Output Rise/Fall Time | 9 ns to 16 ns | ns |
| Standby Supply Current | < 2 µA | µA |
| Operating Supply Current | < 3 mA | mA |
| ESD Protection | ± 16 kV HBM, ± 8 kV IEC 61000-4-2 Contact Discharge, ± 30 kV IEC 61000-4-2 Air-Gap Discharge | kV |
| Surge Protection | ± 2.5 kV IEC 61000-4-5 1.2/50-µs Surge | kV |
Key Features
- Meets or exceeds the requirements of the TIA/EIA-485A standard
- Integrated surge protection using transient voltage suppressor (TVS) diodes
- Bus I/O protection against ESD and surge transients
- 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 current < 2 µA, operating current < 3 mA
- 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 package for drop-in compatibility
Applications
- Wireless Infrastructure
- Building Automation
- HVAC Systems
- Factory Automation & Control
- Grid Infrastructure
- Smart Meters
- Process Analytics
- Video Surveillance
Q & A
- What is the supply voltage range for the THVD1429DT?
The supply voltage range is 3 V to 5.5 V. - What is the maximum data rate of the THVD1429DT?
The maximum data rate is 20 Mbps. - What is the ambient temperature range for the THVD1429DT?
The ambient temperature range is -40°C to 125°C. - What kind of ESD protection does the THVD1429DT offer?
The device offers ± 16 kV HBM ESD protection, ± 8 kV IEC 61000-4-2 contact discharge, and ± 30 kV IEC 61000-4-2 air-gap discharge. - Does the THVD1429DT have surge protection?
Yes, it has ± 2.5 kV IEC 61000-4-5 1.2/50-µs surge protection. - What is the standby supply current of the THVD1429DT?
The standby supply current is less than 2 µA. - What is the operating supply current of the THVD1429DT?
The operating supply current is less than 3 mA. - Is the THVD1429DT compatible with existing PCB designs?
Yes, it is packaged in an industry-standard 8-pin SOIC (D) package for easy drop-in compatibility. - What are some common applications for the THVD1429DT?
Common applications include wireless infrastructure, building automation, HVAC systems, factory automation, grid infrastructure, smart meters, process analytics, and video surveillance. - Does the THVD1429DT support hot plug-in capability?
Yes, it has glitch-free power-up/down for hot plug-in capability.
