Overview
The THVD1426DRLR is a robust half-duplex RS-485 transceiver designed by Texas Instruments for industrial applications. This device is part of the THVD14x6 series, which includes the THVD1406 and THVD1426 models. The THVD1426DRLR operates within a 3-V to 5.5-V supply voltage range and supports data transmission rates up to 12 Mbps, making it suitable for high-speed data communication needs. It features auto-direction control using the data input pin, reducing the reliance on separate pins for driver-enable and receiver-enable functionality. This design simplifies the control logic and reduces the number of isolation channels or GPIO pins required.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 3-V to 5.5-V | V |
| Data Rate | Up to 12 Mbps | Mbps |
| ESD Protection | ±16-kV HBM, ±12-kV IEC 61000-4-2 Contact Discharge, ±15-kV IEC 61000-4-2 Air Gap Discharge, ±4-kV IEC 61000-4-4 Fast Transient Burst | kV |
| Bus Fault Protection | ±16-V | V |
| Operating Temperature | -40°C to 125°C | °C |
| Package Options | SOIC (8-pin), SOT (8-pin) | - |
| Package Size (SOT) | 2.1 mm x 1.2 mm | mm |
| Standby Supply Current | 3µA (typ) | µA |
| Quiescent Current during Operation | 1.7 mA (typ) | mA |
Key Features
- Meets or exceeds the requirements of the TIA/EIA-485A standard
- Auto-direction control using the data input pin
- Half-duplex RS-422/RS-485 operation
- High ESD protection: ±16-kV HBM, ±12-kV IEC 61000-4-2 Contact Discharge, ±15-kV IEC 61000-4-2 Air Gap Discharge, ±4-kV IEC 61000-4-4 Fast Transient Burst
- ±16-V bus fault protection
- Small, space-saving 8-Pin SOT package option (2.1 mm x 1.2 mm)
- Extended industrial temperature range: -40°C to 125°C
- Large receiver hysteresis for noise rejection
- Low power consumption with low standby supply current and quiescent current during operation
- Glitch-free power-up, power-down for hot plug-in capability
- Open, short, and idle bus fail-safe
- 1/8 Unit load (Up to 256 bus nodes)
Applications
- Factory automation and control
- Building automation
- HVAC systems
- Video surveillance
- Smart meters
Q & A
- What is the data transmission rate of the THVD1426DRLR?
The THVD1426DRLR supports data transmission rates up to 12 Mbps.
- What is the operating supply voltage range of the THVD1426DRLR?
The device operates within a 3-V to 5.5-V supply voltage range.
- What kind of ESD protection does the THVD1426DRLR offer?
The device offers ±16-kV HBM, ±12-kV IEC 61000-4-2 Contact Discharge, ±15-kV IEC 61000-4-2 Air Gap Discharge, and ±4-kV IEC 61000-4-4 Fast Transient Burst ESD protection.
- What are the package options available for the THVD1426DRLR?
The device is available in SOIC (8-pin) and SOT (8-pin) packages.
- What is the operating temperature range of the THVD1426DRLR?
The device operates over an ambient temperature range of -40°C to 125°C.
- Does the THVD1426DRLR support hot plug-in capability?
- What is the standby supply current of the THVD1426DRLR?
The standby supply current is typically 3µA.
- How many bus nodes can the THVD1426DRLR support?
The device can support up to 256 bus nodes as a 1/8 unit load.
- What are some common applications of the THVD1426DRLR?
- Does the THVD1426DRLR have built-in fail-safe mechanisms?
