THVD1439DR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The THVD1439DR is a robust RS-485 line transceiver operating from 3 V to 5.5 V supply, featuring 4 kV surge protection and 1.8 V VIO compatibility for low-voltage logic interfaces. It is available in an 8-pin SOIC package with worldwide distribution and fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- THVD1439DR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.4400(MOQ 62)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4 kV surge protection on RS-485 bus pins for reliable operation in electrically noisy industrial environments
- Wide supply range of 3 V to 5.5 V with 1.8 V VIO capability enabling direct interfacing to low-voltage MCUs
- Differential Schmitt trigger receiver input for superior noise immunity on long RS-485 cable runs
Applications
The THVD1439DR is designed for RS-485 and RS-422 communication networks in industrial automation, building control systems, and smart metering where transient surge protection is essential. Its 1.8 V VIO capability makes it directly compatible with modern low-power microcontrollers and FPGAs operating at 1.8 V logic levels without level-shifting. The 4 kV surge rating protects the bus interface against lightning-induced transients and electrostatic discharge events common in long-distance fieldbus installations.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Differential Output | YES |
| Driver Number of Bits | 1 |
| High Level Input Current-Max | 0.000005A |
| Input Characteristics | DIFFERENTIAL SCHMITT TRIGGER |
| Interface IC Type | LINE TRANSCEIVER |
| Interface Standard | EIA-485-A; TIA-485-A |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Out Swing-Min | 1.5V |
| Output Characteristics | DIFFERENTIAL |
| Output Low Current-Max | 0.008A |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Receive Delay-Max | 110ns |
| Receiver Number of Bits | 1 |
| Supply Current-Max | 5mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 3.6V |
| Supply Voltage1-Max | 5.5V |
| Supply Voltage1-Min | 3V |
| Supply Voltage1-Nom | 3.3V |
| Surface Mount | YES |
| Technology | BICMOS |
| Terminal Finish | Nickel/Palladium/Gold/Silver (Ni/Pd/Au/Ag) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Transmit Delay-Max | 650ns |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How much surge protection does the THVD1439DR provide and why does it matter for industrial RS-485 networks?
The THVD1439DR integrates 4 kV surge protection on its RS-485 bus pins, guarding against transient overvoltage events caused by lightning coupling or electrostatic discharge on long cable runs. This built-in protection eliminates the need for external TVS diodes in many industrial installations, reducing BOM cost and board space while maintaining EIA-485-A compliance.
Can THVD1439DR interface directly with a 1.8 V microcontroller logic level without an external level shifter?
Yes, the THVD1439DR includes a dedicated 1.8 V VIO pin that sets the logic threshold for the driver input and receiver output independently from the RS-485 supply, which operates at 3 V to 5.5 V. This eliminates external level-shifting circuitry when connecting to 1.8 V ARM Cortex or RISC-V microcontrollers.
What differential receiver sensitivity does the THVD1439DR achieve and how does it compare on long cable runs?
The THVD1439DR uses a differential Schmitt trigger receiver that provides hysteresis for reliable data recovery in noisy environments. RS-485 bus inputs as low as 200 mV differential are correctly interpreted, which is important on cable runs of 1200 meters or more where signal attenuation reduces the differential amplitude seen at the receiver.
What package does the THVD1439DR use and how does it compare to larger RS-485 transceiver packages?
The THVD1439DR comes in an 8-pin SOIC package, one of the smallest standard form factors for single-channel RS-485 transceivers, which helps minimize PCB area in space-constrained I/O modules. The 8-pin count reflects its single-driver, single-receiver architecture, compared to multi-channel transceivers in 16-pin or larger packages that add complexity when only 1 bus channel is needed.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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Integrated Circuit
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 62+ | $3.2419 | $201.00 |
| 80+ | $3.1338 | $250.70 |
| 100+ | $2.6614 | $266.14 |
| 250+ | $2.5264 | $631.61 |
| 500+ | $2.5168 | $1258.42 |
| 1000+ | $2.4400 | $2440.00 |
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