SN65HVD30D - 3.3V Full-Duplex RS-485 Transceiver | Texas Instruments
料号： SN65HVD30D ✓ 量产中SN65HVD30D 概述
An RS-485 transceiver is the physical-layer interface between digital logic and a balanced, differential communications bus. The driver converts a differential logic input into balanced line output, while the receiver converts the differential bus voltage into a single-ended logic output. Full-duplex operation requires separate transmit and receive paths, so the SN65HVD30D provides four bus-facing pins in addition to its data-interface and supply pins. Its 3.3 V supply operation supports systems using low-voltage digital logic.
The SN65HVD30 is a 3-state differential line driver and differential-input line receiver designed for robust communication links. The device family supports both RS-422 and RS-485 applications, and the SN65HVD30, SN65HVD31, and SN65HVD32 are identified as fully featured members of the SN65HVD3x family by Texas Instruments. The driver and receiver each have independent input and output pins, allowing a controller to transmit and receive simultaneously without sharing the same pair of bus conductors.
Typical installations include industrial RS-485 networks, factory automation equipment, building controls, instrumentation, and embedded communications systems. The balanced differential signaling helps reject common-mode noise, while the separate full-duplex channels support continuous two-way communication. Because the interface is intended for cable lengths of up to 1500 m, designers should still evaluate cable impedance, termination, topology, grounding, and transceiver loading for the complete network.
For a new layout, place the transceiver and its interface components close to the bus connector and ground-return arrangement, and route differential traces as a closely coupled pair. Decoupling capacitors should be placed directly beside the supply pins, while protection components should be selected to match the cable environment. The 8-pin SOIC package requires careful pin assignment and controlled routing because there is limited space for high-density bypass and protection networks.
The SN65HVD30D is most appropriate when a design needs a dedicated 3.3 V full-duplex RS-422 or RS-485 physical layer rather than a half-duplex transceiver with shared driver pins. Designers should verify the complete data sheet for electrical characteristics, enable and disable behavior, receiver thresholds, driver output limits, thermal performance, and recommended application circuits before releasing a production layout.
This product overview combines the manufacturer’s device description with practical guidance for interface design. It also provides sourcing answers, application context, design checks, and same-package replacement guidance intended to make component evaluation and PCB planning more efficient.
直接替换替代料： SN65HVD30D ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SN65HVD30D （相同外形与封装尺寸） ——差异在于 Product Type, Package, Bus Standard, Duplex Mode, Maximum Cable Length.
SN65HVD31D
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SN65HVD32D
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SN65HVD30-EP
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
SN65HVD30DR
✅ 直接替换📋 参考替代料（不在目录中）
SN65HVD30D 规格参数
| Product Type | 3.3 V full-duplex RS-485 driver and receiver |
| 电源电压 | 3.3 V |
| Supported Standards | RS-422 and RS-485 |
| Bus Length | up to 1500 m |
| Duplex Mode | Full-duplex |
| Driver Output | 3-state differential line driver |
| Receiver Input | Differential-input line receiver |
| Logic Interface | Separate driver and receiver input and output pins |
| 封装 | 8-pin SOIC (D) |
| 工作温度 | -40°C to 85°C |
| 安装类型 | Surface mount |
SN65HVD30D 8-pin soic (d) 引脚配置指南
SN65HVD30D（8-pin soic (d) 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： SN65HVD30D.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SN65HVD30D 适用于 6 应用s: Industrial RS-485 Control Networks, Building Automation and HVAC Equipment, Instrumentation and Measurement Systems, Embedded Data Acquisition Nodes, Factory Sensor and Actuator Networks, Telecommunications and Remote Communication Equipment.
Industrial RS-485 Control Networks
The SN65HVD30D fits industrial control networks that require a dedicated full-duplex differential interface at 3.3 V. Its separate driver and receiver paths allow a controller to transmit commands while simultaneously receiving sensor or equipment status. The manufacturer specifies support for RS-422 and RS-485 transmission over cable lengths of up to 1500 m, making the device appropriate for factory equipment, process controls, and remote I/O when network loading and termination are designed correctly.
推荐
Building Automation and HVAC Equipment
Building controllers can use the SN65HVD30D for full-duplex RS-485 communications between room units, HVAC controllers, gateways, and supervisory equipment. Operation from a 3.3 V rail supports modern embedded control platforms, while differential signaling helps reject common-mode disturbances encountered near motors and switching equipment. Its 8-pin SOIC package supports compact controller layouts, although cable protection and grounding must be matched to the building installation environment.
推荐
Instrumentation and Measurement Systems
The SN65HVD30D is appropriate for instrumentation links that exchange commands and measurement data over a dedicated full-duplex bus. The differential driver and receiver provide a robust interface between a 3.3 V controller and remote sensors, analyzers, or programmable instruments. Designers can exploit the separate transmit and receive channels to simplify protocol timing, while checking the manufacturer electrical characteristics for receiver thresholds and bus loading before choosing cable length and topology.
推荐
Embedded Data Acquisition Nodes
A data-acquisition node can use the SN65HVD30D to connect a 3.3 V embedded processor to remote sensors or actuators over a full-duplex differential bus. The dedicated receiver remains available while the controller drives the transmitter, which helps avoid shared-direction logic and simplifies communication firmware. The interface supports cable runs of up to 1500 m according to the manufacturer, subject to the baud rate, cable characteristics, topology, and termination used by the network.
推荐
Factory Sensor and Actuator Networks
The SN65HVD30D can connect field sensors and actuators to a factory controller when a full-duplex topology is preferred over a shared half-duplex bus. Its 3.3 V supply requirement is convenient for embedded control boards, and the balanced differential interface is suited to industrial cabling. Separate transmit and receive buses provide continuous two-way communication, while the 8-pin SOIC footprint keeps the interface compact enough for compact field equipment and distributed I/O modules.
推荐
Telecommunications and Remote Communication Equipment
The SN65HVD30D supports telecom and remote-equipment designs that need a 3.3 V full-duplex balanced interface over copper wiring. Separate transmitter and receiver channels permit simultaneous control traffic and status reporting, which is useful in distributed communication equipment. Texas Instruments specifies RS-422 and RS-485 operation over cable lengths of up to 1500 m, but practical reach also depends on signaling rate, cable impedance, protection, grounding, and the number of connected receivers.
推荐
推荐产品汇总
工程参考数据： SN65HVD30D ——对比、设计指导和合规信息。
选型指南
Review SN65HVD31D or SN65HVD32D when a related SN65HVD3x feature set better matches the required data rate or receiver behavior, but do not assume electrical equivalence without checking both datasheets. Consider SN65HVD30-EP when an enhanced-product lifecycle designation or qualification is useful. SN65HVD30DR is primarily an alternate reel order code for the same device rather than a different circuit choice. For half-duplex buses, isolated links, or a different supply voltage, select a transceiver explicitly designed for that topology instead.
与替代料对比
| 参数 | 本产品 | SN65HVD31D | SN65HVD32D | SN65HVD30-EP | SN65HVD30DR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-pin SOIC (D) | 8-pin SOIC (D) | 8-pin SOIC (D) | 8-pin SOIC (D) | 8-pin SOIC (D) |
| Product Type | 3.3 V full-duplex RS-485 driver and receiver | 3.3 V full-duplex RS-485 driver and receiver | 3.3 V full-duplex RS-485 driver and receiver | 3.3 V full-duplex RS-485 driver and receiver | 3.3 V full-duplex RS-485 driver and receiver |
| Supported Standards | RS-422 and RS-485 | RS-422 and RS-485 | RS-422 and RS-485 | RS-422 and RS-485 | RS-422 and RS-485 |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Duplex Mode | Full-duplex | Full-duplex | Full-duplex | Full-duplex | Full-duplex |
| Maximum Cable Length | 1500 m | 1500 m | 1500 m | 1500 m | 1500 m |
关键差异点
- Dedicated full-duplex bus architecture （对比 SN65HVD30DR)
- Single-rail 3.3 V operation （对比 SN65HVD31D)
- Enhanced-product option for availability planning （对比 SN65HVD30-EP)
设计说明
Place the supply bypass capacitor directly between the transceiver supply and ground pins, using the capacitor value and layout recommended in the manufacturer datasheet. Keep the differential traces short, continuous, and over a continuous ground plane. Route the transmit and receive pairs as controlled-impedance traces where required, and avoid routing them beneath switching nodes or unrelated high-current paths.
Do not substitute a half-duplex RS-485 transceiver for this full-duplex device without redesigning the bus wiring and direction-control logic. The SN65HVD30D allocates separate differential pins for the transmitter and receiver, whereas a half-duplex implementation commonly shares one bus pair. Also verify the enable polarity and receiver output behavior against the actual schematic before finalizing the firmware and pin connections.
Keep the bus-side interface section close to the connector and place any transient-voltage protection, termination, or biasing components where they can minimize stub lengths and loop area. Confirm termination and common-mode bias requirements from the network topology rather than adding them by default. For long cables, use twisted-pair wiring and a deliberate grounding or reference strategy to reduce common-mode voltage at the receiver.
合规信息
The manufacturer product page and ordering snippet identify the SN65HVD30D as a 3.3 V full-duplex RS-485 driver and receiver in an 8-pin SOIC package rated from -40°C to 85°C. Specific environmental and material-compliance declarations were not identified in the referenced text.