SN65HVD33D - 3.3V Full-Duplex RS-485 Transceiver | Texas Instruments
MPN： SN65HVD33D ✓ 啟用中SN65HVD33D 概覽
An RS-485 transceiver is an interface IC that combines a differential line driver, differential receiver, and electrical protection for bidirectional data buses. It belongs to the RS-422 and RS-485 transceiver family within the broader interface-IC and semiconductor hierarchy. Full-duplex operation uses separate transmit and receive paths, allowing a node to transmit and receive simultaneously without sharing the same differential pair.
Key features include one driver and one receiver in an 8-pin package, 3.3 V operation, one-eighth unit loading, support for as many as 256 nodes on a bus, and fault protection from -9 V to +14 V. The bus pins include ESD protection exceeding 15 kV HBM. A 1 Mbit/s option provides slower driver edges to reduce ringing and electromagnetic interference on longer or imperfectly terminated interconnects.
The SN65HVD33D uses differential signaling to reject common-mode noise and support reliable communication over cable distances where single-ended logic would be more susceptible to interference. Independent receiver and driver enable controls support point-to-point links, multidrop buses, industrial equipment, and systems that require controlled direction changes. The 8-pin SOIC package allows straightforward surface-mount assembly and compatibility with standard small-outline PCB land patterns.
Typical applications include industrial RS-485 links, building automation equipment, instrumentation, motor-control systems, factory communication networks, and data acquisition systems. Designers should account for the difference between the normal 26 Mbit/s signaling capability and the optional slow-edge behavior intended for 1 Mbit/s buses.
Use the manufacturer pin-description table when assigning PCB tracks, and preserve the exposed spacing required by the SOIC footprint. Input and output filtering, bus termination, protection grounding, and enable sequencing should be validated against the actual cable length, topology, data rate, and grounding arrangement.
This page combines manufacturer specifications, drop-in replacement guidance, comparative engineering information, and practical interface-design notes. It helps engineers evaluate the SN65HVD33D against electrically similar devices while keeping the same-package and pin-compatibility requirements in view.
直接替換替代品，適用於 SN65HVD33D — 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。
SN65HVD32D
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →THVD1500D
✅ 直接替換📋 參考替代品（不在目錄中）
SN65HVD30D
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →SN65HVD33D 規格
| Device Type | 1/1 full-duplex RS-422/RS-485 transceiver |
| 供應電壓 | 3.3 V |
| Number of Drivers | 1 |
| Number of Receivers | 1 |
| Unit Load | 1/8 unit load |
| Maximum Bus Nodes | 256 nodes |
| Maximum Signaling Rate | 26 Mbit/s |
| Controlled Transition-Time Signaling Rate | 1 Mbit/s |
| Bus-Pin ESD Protection | Exceeds 15 kV HBM |
| Fault Protection Range | -9 V to +14 V |
| 工作溫度 | -55 C to +125 C |
| 封裝 | SOIC-8, MS-012AA |
| 腳位數 | 8 pins |
| 安裝類型 | Surface mount |
| Enable Functions | Driver and receiver enables |
| Supported Standards | RS-422 and RS-485 |
SN65HVD33D soic-8, ms-012aa 腳位配置指南
SN65HVD33D（soic-8, ms-012aa 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： SN65HVD33D.
請參閱 資料表 以查看完整腳位配置。
典型應用
SN65HVD33D 適用於 6 應用s: Industrial RS-485 Equipment, Factory Automation Networks, Building Automation, Data Acquisition Systems, Motor and Power-Control Communication, Instrumentation and Test Equipment.
Industrial RS-485 Equipment
The SN65HVD33D fits industrial RS-485 equipment requiring a 3.3 V interface with high node density and extended-temperature operation. Its one-eighth unit load supports as many as 256 nodes, while the -55 C to +125 C rating covers harsh enclosure environments. The separate full-duplex driver and receiver paths support simultaneous data collection and control. At 26 Mbit/s, keep cable length and topology within the manufacturer’s recommended limits; use the controlled-edge option for 1 Mbit/s networks where slower transitions reduce ringing and EMI.
推薦
Factory Automation Networks
The SN65HVD33D is appropriate for factory automation nodes that need reliable differential communication on a 3.3 V logic rail. The one-eighth unit load allows more equipment to share a multidrop bus, while the 26 Mbit/s signaling capability supports short, high-speed links between controllers and peripheral modules. For long factory cables, use the 1 Mbit/s transition-time option to reduce edge ringing and EMI. Isolation and surge protection should be added where the bus crosses buildings, motor systems, or high-energy industrial equipment.
推薦
Building Automation
The SN65HVD33D supports building automation controllers that distribute sensor, actuator, and configuration data over a 3.3 V RS-485 network. A one-eighth unit load permits a higher device count than one-unit transceivers, and the extended -55 C to +125 C range helps with equipment placed in unconditioned spaces. The full-duplex architecture can support continuous monitoring when separate transmit and receive pairs are available. Otherwise, the independent enable controls help manage bus direction, while the controlled-edge mode can improve compatibility with slower field wiring.
推薦
Data Acquisition Systems
The SN65HVD33D is well suited to compact data-acquisition modules that aggregate measurements from multiple remote sensors. Differential signaling improves noise immunity in industrial environments, while the one-eighth unit load supports up to 256 nodes according to the manufacturer datasheet. The 26 Mbit/s maximum rate handles high-throughput acquisition over short links, and the slower 1 Mbit/s option supports longer cables with reduced ringing. The 8-pin SOIC package keeps the interface compact, although an exposed-pad arrangement should be considered where system density or thermal dissipation is critical.
推薦
Motor and Power-Control Communication
The SN65HVD33D can connect a 3.3 V controller to motor-drive equipment over a differential RS-485 command and feedback link. Its 26 Mbit/s capability supports fast command traffic over short cables, while the selectable 1 Mbit/s edge rate helps control ringing in longer installations. The -55 C to +125 C operating range suits equipment exposed to temperature variation. Because motor environments contain switching noise and ground transients, isolate the interface when required, terminate the bus correctly, and protect both connector and cable entries.
推薦
Instrumentation and Test Equipment
The SN65HVD33D supports compact instrumentation that must exchange commands and measurement data with remote test fixtures. Its full-duplex architecture enables simultaneous control and response when separate differential pairs are used, and the 3.3 V supply suits modern mixed-signal systems. One-eighth unit loading permits numerous low-power fixtures on the same bus, but high-speed operation requires short, controlled interconnects. For longer leads, select the controlled transition-time mode for 1 Mbit/s signaling to limit ringing and reduce EMI around sensitive measurement circuits.
推薦
推薦產品摘要
工程參考資料，適用於 SN65HVD33D — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | SN65HVD32D | THVD1500D | SN65HVD30D |
|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
主要差異化特點
- High node count in an 8-pin interface (對比SN65HVD30D)
- Higher maximum signaling capability (對比THVD1500D)
- Full-duplex node architecture (對比SN65HVD32D)
設計說明
Treat cable length, topology, and data rate as one signal-integrity design. The SN65HVD33D can signal at up to 26 Mbit/s, but its optional controlled-edge mode targets 1 Mbit/s signaling. For longer or poorly terminated runs, use the slower-edge configuration, maintain the recommended termination network, and avoid introducing unnecessary stubs so ringing and differential-mode voltage are minimized.
Keep the transceiver, protection components, and connector path in a compact, controlled high-speed layout. Route the differential pair as a closely coupled pair with continuous reference planes, minimize stub lengths, and keep bus-side protection components close to the connector. Confirm that ground and return paths support the common-mode and fault conditions expected in the installation.
Do not assume that the 26 Mbit/s headline rate is suitable for every cable. Bus length, node spacing, termination, transceiver enable timing, and grounding determine practical performance. Use the manufacturer pin-description table for enable polarity and logic levels, and verify the final design at the intended baud rate with representative cable and loading conditions.
For industrial or motor-control systems, consider the controlled 1 Mbit/s transition-time option when edge energy could couple into nearby circuitry. Add isolation or surge protection when the bus leaves the enclosure or crosses an equipment boundary. The internal ESD rating improves robustness but does not replace external protection for severe lightning or industrial surge events.
合規資訊
The manufacturer product page and search extracts do not state specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status.
