Overview
The THVD1451DRBR is a 3.3-V to 5-V RS-485 transceiver designed by Texas Instruments, specifically tailored for rugged industrial environments. This device is part of the THVD14xx family, which is known for its noise-immune RS-485/RS-422 transceivers. The THVD1451DRBR operates from a single supply voltage between 3 V and 5.5 V and features an extended common-mode voltage range, making it suitable for multi-point applications over long cable runs. It is available in a small VSON (DRB) package with 8 pins, which saves board space and offers drop-in compatibility with SOIC packages.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VSON (DRB) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage | 3 V to 5.5 V | V |
| Supply Current (Max) | 2.8 mA | mA |
| Signaling Rate | 500 kbps and 50 Mbps | - |
| ESD Protection | ±30 kV HBM, ±18 kV IEC 61000-4-2 Contact Discharge, ±25 kV IEC 61000-4-2 Air-Gap Discharge, ±4 kV IEC 61000-4-4 Fast Transient Burst | kV |
| Common-mode Voltage Range | ±15 V | V |
| Standby Supply Current | < 1 µA | µA |
| Receiver Hysteresis | Large for noise rejection | - |
| Bus Failsafe | Open, Short, and Idle | - |
| Unit Load | 1/8 (Up to 256 bus nodes) | - |
Key Features
- Meets or exceeds the requirements of the TIA/EIA-485A standard
- Differential output exceeds 2.1 V for PROFIBUS compatibility with 5-V supply
- Bus I/O ESD protection: ±30 kV HBM, ±18 kV IEC 61000-4-2 Contact Discharge, ±25 kV IEC 61000-4-2 Air-Gap Discharge, ±4 kV IEC 61000-4-4 Fast Transient Burst
- Extended operational common-mode range: ±15 V
- Low EMI with 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 and VSSOP packages save board space or SOIC for drop-in compatibility
Applications
- Motor Drives
- Factory Automation & Control
- Grid Infrastructure
- Building Automation
- HVAC Systems
- Video Surveillance
- Process Analytics
- Wireless Infrastructure
Q & A
- What is the operating voltage range of the THVD1451DRBR?
The THVD1451DRBR operates from a single supply voltage between 3 V and 5.5 V.
- What is the maximum ESD protection level for the THVD1451DRBR?
The device offers ±30 kV HBM, ±18 kV IEC 61000-4-2 Contact Discharge, ±25 kV IEC 61000-4-2 Air-Gap Discharge, and ±4 kV IEC 61000-4-4 Fast Transient Burst ESD protection.
- What are the signaling rates supported by the THVD1451DRBR?
The device supports signaling rates of 500 kbps and 50 Mbps.
- What is the common-mode voltage range of the THVD1451DRBR?
The common-mode voltage range is ±15 V.
- How much current does the THVD1451DRBR consume in standby mode?
The standby supply current is less than 1 µA.
- What is the maximum operating temperature of the THVD1451DRBR?
The device operates over an ambient temperature range of –40°C to 125°C.
- Does the THVD1451DRBR support hot plug-in capability?
Yes, it features glitch-free power-up/down for hot plug-in capability.
- What type of bus failsafe does the THVD1451DRBR have?
The device has open, short, and idle bus failsafe.
- How many bus nodes can the THVD1451DRBR support?
It supports up to 256 bus nodes as a 1/8 unit load.
- In what packages is the THVD1451DRBR available?
The device is available in VSON (DRB), VSSOP, and SOIC packages.
