SN65HVD30D - 3.3V Full-Duplex RS-485 Transceiver | Texas Instruments
MPN： SN65HVD30D ✓ 啟用中SN65HVD30D 概覽
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.
直接替換替代品，適用於 SN65HVD30D — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： SN65HVD30D （相同外形與佔位） — 差異在於 Product Type, Package, Bus Standard, Duplex Mode, Maximum Cable Length.
SN65HVD31D
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →SN65HVD32D
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →SN65HVD30-EP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SN65HVD30DR
✅ 直接替換📋 參考替代品（不在目錄中）
SN65HVD30D 規格
| Product Type | 3.3 V full-duplex RS-485 driver and receiver |
| 供應電壓 | 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 |
| 封裝 | 8-pin SOIC (D) |
| 工作溫度 | -40°C to 85°C |
| 安裝類型 | Surface mount |
SN65HVD30D 8-pin soic (d) 腳位配置指南
SN65HVD30D（8-pin soic (d) 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： SN65HVD30D.
請參閱 資料表 以查看完整腳位配置。
典型應用
SN65HVD30D 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 SN65HVD30D — 比較、設計指引及合規資訊。
選型指南
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.
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Dedicated full-duplex bus architecture (對比SN65HVD30DR)
- Single-rail 3.3 V operation (對比SN65HVD31D)
- Enhanced-product option for availability planning (對比SN65HVD30-EP)
設計說明
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.
合規資訊
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.