PTHVD1406DR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Half-duplex RS-485 transceiver operating from 3.3V to 5V supplies at up to 500 kbps with automatic direction control. Offers ±8 kV IEC ESD protection and a differential Schmitt-trigger input in an 8-pin SOIC package for robust industrial communications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- PTHVD1406DR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Automatic direction control eliminates the need for a dedicated enable signal, simplifying half-duplex RS-485 firmware and PCB routing
- ±8 kV IEC 61000-4-2 ESD protection on bus pins guards transceiver nodes in harsh industrial cable environments
- Operates from 3.3V or 5V single supply with 500 kbps maximum data rate, compatible with both legacy 5V and modern 3.3V MCU interfaces
- Differential Schmitt-trigger receiver input improves noise immunity on long cable runs with common-mode voltages from -7V to +12V
- Compact 8-pin SOIC (SOIC-8) footprint with low 0.1 mA high-level input current reduces drive requirements on microcontroller GPIO lines
Applications
The PTHVD1406DR is designed for industrial networks, building automation, and RS-485 multi-drop bus systems where half-duplex communication at up to 500 kbps over twisted-pair cable is required. Its auto-direction control and ±8 kV ESD protection make it ideal for field instrument nodes, HVAC control panels, and energy meters that must withstand electrical surges from long cable runs in noisy factory environments.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Differential Output | YES |
| Driver Number of Bits | 1 |
| High Level Input Current-Max | 0.0001A |
| 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 | 0.004A |
| 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 | 3mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 5V |
| Supply Voltage1-Max | 5.5V |
| Supply Voltage1-Min | 3V |
| Supply Voltage1-Nom | 5V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Transmit Delay-Max | 500ns |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PTHVD1406DR:
Frequently Asked Questions
How does the PTHVD1406DR's auto-direction control work and what microcontroller resources does it save?
The PTHVD1406DR automatically switches the RS-485 bus between transmit and receive modes based on the driver input state, removing the need for a separate RTS GPIO pin from the microcontroller. This simplifies firmware on UART-only MCU peripherals and reduces PCB routing on 500 kbps half-duplex networks with up to 32 nodes.
What ESD protection level does the PTHVD1406DR provide and which industrial standards does it meet?
The PTHVD1406DR provides ±8 kV ESD protection on its bus pins, conforming to IEC 61000-4-2 contact discharge requirements. This level of protection is suitable for RS-485 nodes in industrial panel wiring, where cable lengths of 100 m or more can accumulate static charges that would damage standard ±2 kV transceivers.
Can the PTHVD1406DR operate from a 3.3V supply in a system using a 5V RS-485 bus?
Yes, the PTHVD1406DR accepts a supply voltage from 3.3V to 5V while maintaining RS-485 compliant differential output levels across the full range. A 3.3V-powered device can drive a 5V bus because the differential output voltage exceeds the 1.5V minimum required by EIA-485-A, enabling direct mixed-voltage network operation without level translators.
What is the maximum data rate supported by PTHVD1406DR and how far can it communicate at that rate?
The PTHVD1406DR supports up to 500 kbps on a standard twisted-pair cable. At 500 kbps, reliable communication is typically achievable over cable runs up to approximately 400 m using 24 AWG shielded cable with termination resistors of 120 ohms at each end, meeting TIA-485-A bus loading requirements for up to 32 unit loads.
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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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