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Texas Instruments THVD1419DR
- Part No.:
- THVD1419DR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THVD1419DR.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,108
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Product details
Overview
THVD1419DR from Texas Instruments is a half-duplex RS-485 transceiver with integrated ±2.5-kV IEC 61000-4-5 surge protection, 250-kbps signaling rate, and 3.3-V to 5.5-V single-supply operation. It features ±12-V extended common-mode range, 30-mV receiver hysteresis, and <2 µA standby current - enabling robust industrial serial communication in factory automation and smart metering systems.
For engineers reviewing the THVD1419DR datasheet, THVD1419DR pinout, THVD1419DR application, or THVD1419DR equivalent, key selection considerations include its SOIC-8 package compatibility, failsafe receiver behavior under open/short/idle bus conditions, integrated TVS-based surge immunity eliminating external protection components, and thermal shutdown at 170°C for system-level reliability.
Technical Context
The THVD1419DR implements a half-duplex RS-485 interface with active-high driver enable (DE) and active-low receiver enable (RE), both featuring internal pull-down (2 MΩ) and pull-up (2 MΩ) resistors respectively. Its differential driver delivers ≥1.5 V differential output voltage into 54-Ω RS-485 loads, while the failsafe receiver guarantees high output during open, shorted, or idle bus states.
Surge protection is achieved via monolithically integrated transient voltage suppressor (TVS) diodes on A/B bus pins, validated per IEC 61000-4-5 (±2.5 kV, 1.2/50-μs), alongside ±8-kV IEC 61000-4-2 contact discharge and ±30-kV air-gap ESD immunity - all within the standard 8-pin SOIC (D) footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | 250 kbps - supports medium-speed industrial networks up to ~400 m at full jitter margin. |
| Supply Voltage Range | 3.0 V to 5.5 V - enables direct interfacing with 3.3-V microcontrollers and legacy 5-V systems without level-shifting. |
| Bus Surge Protection | ±2.5 kV per IEC 61000-4-5 - eliminates need for external TVS diodes or MOVs in harsh factory or grid environments. |
| Common-Mode Range | ±12 V - ensures reliable operation across long cable runs with ground potential differences. |
| Receiver Hysteresis | 30 mV - rejects noise-induced false transitions in electrically noisy industrial settings. |
| Standby Current | <2 µA - enables ultra-low-power sleep modes in battery-backed or energy-harvested remote nodes. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, outdoor metering, and high-ambient industrial enclosures. |
Pinout & Package
THVD1419DR is housed in an industry-standard 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, compatible with automated SMT assembly and legacy PCB footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| R | Digital output | Receiver data output - logic-high when VA – VB > VTH+ (≥ –20 mV), failsafe-high during open/short/idle bus. |
| DE | Digital input | Driver enable, active-high with 2-MΩ internal pull-down - defaults to disabled (high-Z) if left floating. |
| D | Digital input | Driver data input - internally pulled up to VCC; drives A high/B low when DE = high and D = high. |
| GND | Ground | Reference node for all logic and bus circuitry - must be connected to system signal ground. |
| A | Bus I/O | Differential bus terminal A - complementary to B; carries inverted RS-485 signal polarity. |
| B | Bus I/O | Differential bus terminal B - complementary to A; carries non-inverted RS-485 signal polarity. |
| RE | Digital input | Receiver enable, active-low with 2-MΩ internal pull-up - defaults to enabled (R active) if left floating. |
| VCC | Power | 3.3-V to 5.5-V supply - powers internal logic, driver, receiver, and integrated TVS protection circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated IEC 61000-4-5 surge protection | ±2.5 kV on A/B pins - removes external TVS components, reduces BOM count and PCB area by ≥3 parts. |
| Failsafe receiver | Guaranteed high output during open, shorted, or idle bus - prevents MCU lockup or undefined UART framing. |
| 1/8 unit load | Supports up to 256 nodes on one bus - enables large-scale distributed control networks without repeaters. |
| Glitch-free power-up/down | No bus contention or false edges during hot-plug events - critical for modular field equipment replacement. |
| Extended common-mode range | ±12 V - tolerates ground offsets across 1000+ meter cable runs in multi-node factory networks. |
Applications
| Factory Automation | Smart Metering |
|---|---|
Use Scenario: PLC-to-sensor network in manufacturing cell with long cable runs and motor-driven EMI sources. IC Role / Device Role / Timing Role: Half-duplex RS-485 transceiver handling Modbus RTU commands between controller and distributed I/O modules. Use Value: ±2.5-kV surge immunity prevents field failures during AC contactor switching; 30-mV hysteresis rejects motor-drive noise. |
Use Scenario: Two-way AMI communication between utility meter and concentrator over twisted-pair distribution lines. IC Role / Device Role / Timing Role: Robust physical-layer interface supporting 250-kbps burst transmission in outdoor, unshielded environments. Use Value: Integrated TVS eliminates need for discrete protection, reducing cost and failure points in high-volume meter production. |
| HVAC Systems | Grid Infrastructure Monitoring |
Use Scenario: Building management system connecting rooftop units, chillers, and VAV controllers over daisy-chained RS-485. IC Role / Device Role / Timing Role: Bus node transceiver enabling centralized monitoring and setpoint adjustment in commercial HVAC networks. Use Value: –40°C to +125°C rating ensures operation in rooftop enclosures; failsafe output prevents spurious alarms during bus disconnection. |
Use Scenario: Substation telemetry unit collecting breaker status and fault current data across 500-m underground runs. IC Role / Device Role / Timing Role: Isolated RS-485 interface (with external isolator) transmitting SCADA data in high-noise, lightning-prone substations. Use Value: ±12-V common-mode range accommodates ground potential differences between remote pads; 250-kbps rate suffices for periodic status polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-485 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65HVD1478DR | Same SOIC-8 package, 250-kbps rate, but only ±1-kV IEC 61000-4-5 surge rating; no integrated TVS - requires external protection. | Suitable for lower-risk indoor environments where external TVS is acceptable and cost-per-node is less constrained. | Select SN65HVD1478DR only if system-level surge testing confirms <±1-kV threat level and layout allows space for external TVS. |
| MAX13487EESA+ | SOIC-8, 250-kbps, ±15-kV HBM ESD, but no IEC 61000-4-5 surge rating; includes slew-rate limiting for reduced EMI. | Better for EMI-sensitive medical or lab equipment; unsuitable for outdoor or industrial surge-prone deployments without added protection. | Choose MAX13487EESA+ when EMI reduction is prioritized over surge immunity and external protection can be added. |
Compared with SN65HVD1478DR and MAX13487EESA+, THVD1419DR uniquely delivers certified ±2.5-kV IEC 61000-4-5 surge protection in a drop-in SOIC-8 package - reducing design risk, BOM cost, and validation effort for industrial field deployments.
Availability
THVD1419DR is available at Aetrix Electronics and suitable for factory automation, smart metering, and HVAC control applications requiring stable component supply, long-term lifecycle support, and guaranteed surge-immunity compliance.
Supply support for THVD1419DR 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 delivering analog and embedded processing solutions, with decades of RS-485 product expertise and AEC-Q100-qualified portfolio breadth.
The THVD14x9 family was designed specifically for industrial RS-485 networks demanding integrated surge resilience, wide temperature operation, and drop-in compatibility - targeting factory, grid, and building infrastructure applications.
FAQ
What is the maximum cable length supported by THVD1419DR at its rated 250-kbps signaling rate?
At 250 kbps, THVD1419DR supports up to approximately 400 meters on standard 120-Ω twisted-pair cable with proper termination, based on RS-485 signal integrity limits and its specified 30-mV receiver hysteresis. Longer distances are achievable at reduced data rates or with controlled-jitter tolerance per Figure 24 in the THVD1419DR datasheet.
Does THVD1419DR require external TVS diodes for IEC 61000-4-5 compliance?
No. THVD1419DR integrates monolithic TVS structures on its A and B bus pins, achieving ±2.5-kV immunity per IEC 61000-4-5 (1.2/50-μs) without any external components - a key differentiator confirmed in Section 9.3.3 and Table 7.3 of the THVD1419DR datasheet.
How does the failsafe receiver in THVD1419DR behave during an open-circuit bus condition?
During an open-circuit bus, the THVD1419DR receiver outputs a logic-high state due to internal biasing - ensuring deterministic UART framing and preventing MCU lockup. This behavior is guaranteed across –40°C to +125°C and is documented in Table 2 (Receiver Function Table) of the THVD1419DR datasheet.
Can THVD1419DR operate from a 3.3-V supply while driving a standard 54-Ω RS-485 load?
Yes. THVD1419DR is fully specified from 3.0 V to 5.5 V and delivers ≥1.5 V differential output voltage into a 54-Ω load at VCC = 3.3 V (see Section 7.7, Driver |VOD| parameter), meeting RS-485 electrical requirements for unit-load drivers.
What is the thermal shutdown threshold of THVD1419DR, and how does it recover?
THVD1419DR activates thermal shutdown at TJ = 170°C (Section 7.7) and automatically recovers once junction temperature falls below the hysteresis threshold (~155°C). This protects against sustained overloads and ensures safe operation in enclosed industrial enclosures without external thermal management.
THVD1419DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- RS485
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Half
- Receiver Hysteresis:
- 30 mV
- Data Rate:
- 250kbps
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
THVD1419DR FAQ
1.How can I place an order for THVD1419DR through Aetrix?
Please submit a Request for Quotation (RFQ) for THVD1419DR 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 THVD1419DR reliable?
The price and inventory of THVD1419DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THVD1419DR is usually 5 days.
3.What payment methods are accepted for THVD1419DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THVD1419DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THVD1419DR?
THVD1419DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THVD1419DR 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 THVD1419DR?
For technical support, including THVD1419DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THVD1419DR requirements.
6.How does Aetrix verify that THVD1419DR is sourced from the original manufacturer or authorized distributors?
All THVD1419DR 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 THVD1419DR meets industry standards.
7.What is the process for return or replacement of THVD1419DR?
All THVD1419DR units undergo pre-shipment inspection (PSI). If there is an issue with THVD1419DR, 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 THVD1419DR part is unused and in its original packaging.
Return procedure for THVD1419DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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