SN65HVD51DR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN65HVD51 is a full-duplex RS-485/TIA-485-A line transceiver operating at up to 5 Mbps signaling rate. It features a differential Schmitt trigger input for improved noise immunity and operates from a 3.3 V or 5 V supply. Packaged in an 8-pin SOIC, it suits industrial fieldbus networks and multi-drop serial communication links.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- SN65HVD51DR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN65HVD51DR?
- Full-duplex RS-485/TIA-485-A transceiver in a single 8-pin SOIC package
- 5 Mbps maximum signaling rate for high-speed serial communication
- Differential Schmitt trigger receiver input for enhanced noise immunity
- Single 3.3 V or 5 V supply operation
- EIA-485-A and TIA-485-A compliant driver and receiver
- RoHS compliant lead-free packaging (JESD-609 e4)
What is SN65HVD51DR used for?
The SN65HVD51 is used in industrial automation fieldbus networks, including RS-485 multi-drop buses connecting PLCs, sensors, and actuators over cable runs up to 1200 m. It is also employed in building automation systems, motor drive communications, and multi-node serial interfaces in factory automation equipment. Its 5 Mbps data rate makes it suitable for high-throughput data acquisition and process control networks.
What are the specifications of SN65HVD51DR?
| YTEOL | 0 |
| Additional Feature | SIGNALING RATE 5 MBPS |
| 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 | 1.7V |
| Output Characteristics | 3-STATE |
| Output Low Current-Max | 0.008A |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Receive Delay-Max | 60ns |
| Receiver Number of Bits | 1 |
| Supply Current-Max | 8mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 5V |
| Supply Voltage1-Max | 5.5V |
| Supply Voltage1-Min | 4.5V |
| Supply Voltage1-Nom | 5V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Transmit Delay-Max | 46ns |
| 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 |
| Country of Origin | Malaysia |
Where can I find the SN65HVD51DR datasheet?
SN65HVD51DR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN65HVD51DR?
Compatible alternatives and drop-in replacements for SN65HVD51DR:
Frequently Asked Questions
What is the maximum data rate supported by the SN65HVD51 RS-485 transceiver?
The SN65HVD51 supports a maximum signaling rate of 5 Mbps, making it suitable for high-speed RS-485 serial communication. At this rate, it can drive a full-duplex differential bus carrying time-sensitive data across multi-drop networks with up to 32 unit loads. For longer cable runs or lower EMI requirements, the device can also operate at reduced data rates such as 1 Mbps or 100 kbps.
How far can a network using the SN65HVD51 communicate reliably?
RS-485 networks using the SN65HVD51 can reach cable lengths up to 1200 m at lower data rates such as 100 kbps or less, with cable capacitance and termination impedance being the main limiting factors. At 5 Mbps, practical cable lengths typically drop to under 10 m to maintain signal integrity. Proper 120 Ω termination resistors at each end of the bus are required to minimize reflections.
Can the SN65HVD51 operate from a 3.3 V supply in a mixed-voltage system?
Yes, the SN65HVD51 is designed to operate from a 3.3 V supply rail, making it compatible with modern low-voltage microcontroller systems. It supports logic-level inputs that are compatible with 3.3 V CMOS logic standards, simplifying integration with processors like STM32, ESP32, and similar 3.3 V embedded controllers. Its differential output swing remains compliant with EIA-485-A specifications even at 3.3 V supply.
Which industrial applications benefit most from the full-duplex configuration of the SN65HVD51?
Full-duplex RS-485 operation is especially valuable in applications requiring simultaneous bidirectional data flow without latency, such as PLC-to-PLC communication, motor drive parameter monitoring, and real-time distributed control networks. The SN65HVD51 enables simultaneous transmit and receive on separate differential wire pairs, eliminating the bus arbitration overhead of half-duplex systems. This is critical in time-sensitive control loops with cycle times under 1 ms.
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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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