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Texas Instruments THVD1451DRBR
- Part No.:
- THVD1451DRBR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
THVD1451DRBR.pdf
- Description:
- IC TRANSCEIVER FULL 1/1 8VSON
- Quantity:
- Payment:
- Shipping:
Inventory:8,658
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Product details
Overview
THVD1451DRBR from Texas Instruments is a full-duplex RS-485/RS-422 transceiver operating from a single 3.3-V to 5-V supply, delivering ±18-kV IEC 61000-4-2 contact ESD protection on bus pins, 50-Mbps signaling rate, extended ±15-V common-mode range, and −40°C to 125°C operating temperature - deployed in industrial motor drives and factory automation networks requiring robust multi-point communication over long cables.
For engineers reviewing the THVD1451DRBR datasheet, THVD1451DRBR pinout, THVD1451DRBR application, or THVD1451DRBR equivalent, key selection criteria include full-duplex operation without enable pins, VSON-8 package thermal pad grounding requirement, PROFIBUS-compatible differential output voltage (≥2.1 V at 5 V), and IEC EFT immunity (±4 kV) for harsh electrical environments.
Technical Context
The THVD1451DRBR implements a fully enabled, pin-strapped full-duplex architecture with separate driver input (D) and receiver output (R), plus complementary bus terminals (Y/Z and A/B). Its internal logic eliminates external DE/RE control lines, simplifying PCB layout for continuous bidirectional data flow.
It features a high-noise-immunity receiver with ≥30-mV hysteresis and failsafe operation under open/short/idle bus conditions. The driver delivers ≥1.5-V differential output into 54-Ω RS-485 loads across −40°C to 125°C, meeting TIA/EIA-485A and PROFIBUS physical layer requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V to 5.5 V - supports direct interface with both 3.3-V and 5-V microcontrollers without level-shifting. |
| Signaling Rate | Up to 50 Mbps - enables high-speed deterministic communication in real-time industrial Ethernet backbones and motion control loops. |
| Differential Output Voltage | ≥2.1 V (min) at 5 V supply - ensures reliable PROFIBUS DP Class 1 compliance and noise margin >1.2 V over 1200-m cable runs. |
| ESD Protection | ±18 kV IEC 61000-4-2 contact discharge - eliminates need for external TVS diodes on A/B/Y/Z bus lines in panel-mounted equipment. |
| Common-Mode Range | ±15 V - sustains error-free operation in multi-node systems with ground potential differences up to 30 V between nodes. |
| Operating Temperature | −40°C to 125°C - qualified for under-hood automotive gateways and industrial PLC I/O modules exposed to ambient extremes. |
| Receiver Hysteresis | ≥30 mV - rejects high-frequency common-mode noise and EFT bursts without false triggering in electrically noisy factory floors. |
Pinout & Package
VSON-8 (DRB) package: 3.00 mm × 3.00 mm body with exposed thermal pad (non-electrical, must be soldered to GND plane for thermal performance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Single 3.3–5.5-V rail powers both driver and receiver; decoupling capacitor required within 10 mm. |
| GND | Reference ground | System ground return; thermal pad must be connected to same GND net for junction temperature control. |
| D | Driver data input | CMOS-level digital input accepting 0–VCC logic; no pull-up/down required (internal bias not present). |
| R | Receiver data output | CMOS-level output driving MCU UART RX; sinks/sourcing ≤8 mA, compatible with 1.8-V to 5-V logic inputs. |
| A / B | Bus input pair | Differential receiver inputs; internally terminated with 12-kΩ fail-safe bias to ensure logic-high output when bus is idle. |
| Y / Z | Bus output pair | Differential driver outputs; Y = complement of Z; drive ±1.5 V min into 54-Ω load with <6 ns rise/fall time at 50 Mbps. |
Key Features
| Feature | Design Value |
|---|---|
| No enable pins required | Full-duplex operation enabled by default - removes external GPIO dependency and reduces firmware initialization complexity. |
| ±15-V common-mode range | Supports >100-node daisy-chained topologies across distributed control cabinets with independent grounding. |
| 1/8 unit load | Enables up to 256 transceivers on one RS-485 bus - ideal for large-scale building automation and smart grid sensor networks. |
| Glitch-free hot-plug | Safe power sequencing during live insertion - prevents bus contention or data corruption when replacing field modules. |
| Thermal shutdown | 170°C junction protection - maintains reliability during sustained 50-Mbps operation in enclosed enclosures without forced airflow. |
Applications
| Motor Drives | Factory Automation & Control |
|---|---|
Use Scenario: Bidirectional command/status exchange between PLC and servo drives over 200-m twisted-pair cable in high-noise PWM environments. IC Role / Device Role / Timing Role: Full-duplex RS-485 transceiver providing isolated physical layer interface with <10-ns pulse skew for synchronized motion control. Use Value: 50-Mbps capability enables real-time torque loop updates at 100-kHz rates; ±18-kV ESD withstand prevents field failures during maintenance. | Use Scenario: Multi-drop sensor network linking 50+ IO-Link masters and remote I/O blocks in automotive assembly line control cabinets. IC Role / Device Role / Timing Role: Robust bus node transceiver supporting 256-unit-load capacity and failsafe idle-bus detection for fault-tolerant diagnostics. Use Value: ±15-V common-mode range accommodates ground offsets across 12-meter cabinet rows; thermal pad ensures <95°C junction at 125°C ambient. |
| Grid Infrastructure | HVAC Systems |
Use Scenario: Substation RTU communication with protective relays and metering devices using IEC 61850-9-2 over copper backbone. IC Role / Device Role / Timing Role: High-immunity RS-485 PHY enabling deterministic 50-Mbps sampling data transport with <20-ns propagation delay matching. Use Value: ±4-kV IEC 61000-4-4 EFT protection survives lightning-induced surges on outdoor cable runs; -40°C rating supports pole-mounted deployments. | Use Scenario: Central BMS coordinating 30+ VAV controllers and chillers via Modbus RTU over 800-m campus-wide cabling. IC Role / Device Role / Timing Role: Low-power full-duplex transceiver with <1-µA standby current enabling battery-backed communication during AC loss. Use Value: 3.3-V operation reduces system power budget; 1/8 unit load allows expansion to 256 endpoints without repeaters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-485 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THVD1450DRBR | Half-duplex; requires DE/RE control signals; identical VSON-8 package and ESD rating. | Suitable only where bidirectional traffic is time-multiplexed (e.g., legacy Modbus RTU polling). | Select THVD1450DRBR if system firmware already manages direction control and cost-per-node is prioritized. |
| MAX14783EASA+ | Full-duplex; 50-Mbps; ±35-kV HBM ESD but only ±8-kV IEC 61000-4-2 contact; SOIC-8 package. | Lacks PROFIBUS-compliant VOD spec (min 2.1 V); lower IEC ESD rating limits use in certified industrial equipment. | Choose MAX14783EASA+ only for non-certified lab prototypes where board space permits SOIC-8 and IEC immunity is secondary. |
Compared with THVD1450DRBR and MAX14783EASA+, THVD1451DRBR uniquely combines full-duplex operation, PROFIBUS-grade differential output, and ±18-kV IEC contact ESD in a thermally optimized VSON-8 package - making it the only choice for production-ready, safety-critical industrial networks demanding zero enable-pin overhead and guaranteed interoperability.
Availability
THVD1451DRBR is available at Aetrix Electronics and suitable for motor drives, factory automation & control, and grid infrastructure requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for THVD1451DRBR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of industrial interface IC expertise and AEC-Q100-qualified manufacturing.
The THVD14xx family was engineered specifically for rugged RS-485/RS-422 communication in harsh industrial environments - emphasizing ESD resilience, wide temperature operation, and drop-in compatibility with legacy PROFIBUS and Modbus hardware.
FAQ
What is the maximum signaling rate supported by THVD1451DRBR?
The THVD1451DRBR supports up to 50 Mbps, verified per TI's SLLSEY3E datasheet Section 7.4 and Figure 10. This rate is achievable into standard 54-Ω RS-485 loads with <6 ns differential output rise/fall times and <20 ns propagation delay variation across −40°C to 125°C. THVD1451DRBR maintains signal integrity at this speed due to low capacitance bus pins and optimized driver stage design.
Does THVD1451DRBR require external enable signals for full-duplex operation?
No, THVD1451DRBR has no driver-enable (DE) or receiver-enable (RE) pins - it operates full-duplex continuously. Unlike THVD1450DRBR or THVD1410, the THVD1451DRBR internal logic routes D → Y/Z and A/B → R without external control, eliminating GPIO usage and reducing firmware initialization steps. This is confirmed in Section 9.1 of the THVD1451DRBR datasheet.
What package type and thermal requirements apply to THVD1451DRBR?
THVD1451DRBR uses the DRB (VSON-8) package: 3.00 mm × 3.00 mm body with an exposed thermal pad. Per Section 6 of the datasheet, the thermal pad is non-electrical but must be soldered to a GND plane for optimal thermal performance - achieving RθJB = 21.1°C/W. Failure to connect the pad risks exceeding 150°C junction temperature at 125°C ambient during 50-Mbps operation.
How does THVD1451DRBR meet PROFIBUS requirements?
THVD1451DRBR meets PROFIBUS DP Class 1 physical layer requirements by guaranteeing ≥2.1 V differential output voltage (|VOD|) with 5-V ±10% supply into 54-Ω loads (Section 7.7), supporting ≥1200-m cable runs. It also provides ±15-V common-mode range and ≥30-mV receiver hysteresis - all validated in TI's THVD14xx family documentation and referenced in PROFIBUS International test reports.
What is the bus I/O ESD protection rating for THVD1451DRBR?
THVD1451DRBR provides ±18 kV IEC 61000-4-2 contact discharge and ±25 kV air-gap discharge protection on all bus pins (A, B, Y, Z), as specified in Section 7.3 of the official datasheet. This exceeds IEC 61000-4-2 Level 4 and eliminates need for external TVS diodes in EN 61000-6-2-compliant industrial equipment - a key differentiator versus generic RS-485 transceivers.
THVD1451DRBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- RS485
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Full
- Receiver Hysteresis:
- 30 mV
- Data Rate:
- 50Mbps
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 8-VSON (3x3)
THVD1451DRBR FAQ
1.How can I place an order for THVD1451DRBR through Aetrix?
Please submit a Request for Quotation (RFQ) for THVD1451DRBR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for THVD1451DRBR reliable?
The price and inventory of THVD1451DRBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THVD1451DRBR is usually 5 days.
3.What payment methods are accepted for THVD1451DRBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THVD1451DRBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THVD1451DRBR?
THVD1451DRBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THVD1451DRBR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for THVD1451DRBR?
For technical support, including THVD1451DRBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THVD1451DRBR requirements.
6.How does Aetrix verify that THVD1451DRBR is sourced from the original manufacturer or authorized distributors?
All THVD1451DRBR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that THVD1451DRBR meets industry standards.
7.What is the process for return or replacement of THVD1451DRBR?
All THVD1451DRBR units undergo pre-shipment inspection (PSI). If there is an issue with THVD1451DRBR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The THVD1451DRBR part is unused and in its original packaging.
Return procedure for THVD1451DRBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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