SN65HVD75D - 3.3V 20Mbps RS-485 Transceiver | Texas Instruments
MPN： SN65HVD75D ✓ 啟用中SN65HVD75D 概覽
An RS-485 transceiver is an interface IC that combines a differential line driver and differential receiver, allowing digital data to be transmitted reliably over balanced, multipoint communication buses. The SN65HVD75 belongs to the transceiver hierarchy of interface ICs, differential line-driver and receiver circuits, and industrial communication semiconductors. Its half-duplex configuration permits a shared pair of conductors to carry data in either direction, but only one direction at a time.
The SN65HVD75D operates from a 3.3 V supply, reaches 20 Mbps, and provides IEC ESD protection on the bus pins. Its logic interface supports 3.3 V and 5 V controllers, which simplifies connection to mixed-voltage digital systems. The wide -40°C to 125°C temperature range also makes the device suitable for industrial environments where commercial-temperature interface ICs may be inadequate. Exact ESD ratings, receiver thresholds, and electrical limits must be confirmed in the manufacturer datasheet.
Each device combines a differential driver and differential receiver operating from one 3.3 V power supply. The bus pins are designed for robust ESD-event handling, including Human Body Model and IEC Contact Discharge protection. The manufacturer datasheet also identifies 250 kbps, 20 Mbps, and 50 Mbps signaling-rate options across the SN65HVD7x family, with 20 Mbps specifically associated with the SN65HVD75.
Typical uses include industrial automation controllers, factory data buses, industrial instrumentation, building automation, and communications equipment operating on RS-485 networks. Its 20 Mbps capability supports high-speed half-duplex links, while 5 V-tolerant logic inputs ease interfacing with both 3.3 V and 5 V controllers. The half-duplex arrangement also requires careful direction-control design because the driver and receiver share the same bus pair.
When designing the circuit, place a 100 nF ceramic bypass capacitor close to the supply pins and use a 3.3 V source capable of supporting the transceiver's operating current. The manufacturer recommends the TPS76333 for a suitable 3.3 V supply and the SN6501 for isolated power-supply designs. Bus routing should minimize stubs and maintain controlled differential impedance.
This page combines verified manufacturer and distributor information, transparent pricing-status notes, same-family replacement analysis, and practical RS-485 design guidance. It also distinguishes verified electrical facts from parameters that still require confirmation against the complete SN65HVD7x manufacturer datasheet.
直接替換替代品，適用於 SN65HVD75D — 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： SN65HVD75D （相同外形與佔位） — 差異在於 Package, Duplex, Operating Temperature Range, Product Type.
SN65HVD72D
✅ 直接替換聯絡詢價
查看資料表 →SN65HVD73DGS
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →SN65HVD74D
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SN65HVD75D 規格
| Product Type | Half-duplex RS-485 transceiver |
| 供應電壓 | 3.3 V |
| Maximum Signaling Rate | 20 Mbps |
| Logic Input Compatibility | 5 V tolerant; compatible with 3.3 V or 5 V controllers |
| ESD Protection | IEC ESD protection on bus pins |
| ESD Test Model | Human Body Model and IEC Contact Discharge |
| 工作溫度範圍 | -40°C to 125°C |
| 封裝 | 8-pin SOIC (D) |
| 安裝類型 | Surface mount |
| Driver and Receiver Architecture | One differential driver and one differential receiver |
| Duplex Mode | Half-duplex |
| Bus Standards | RS-485 and RS-422 compatible transceiver |
| Recommended Supply Bypass | 100 nF ceramic capacitor |
| Recommended 3.3 V Regulator | TPS76333 |
| Recommended Isolated Supply Reference | SN6501 |
SN65HVD75D 8-pin soic (d) 腳位配置指南
SN65HVD75D（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： SN65HVD75D.
請參閱 資料表 以查看完整腳位配置。
典型應用
SN65HVD75D 適用於 6 應用s: Industrial Automation Data Bus, Factory Sensor and Controller Network, Building Automation Communication, Industrial Instrumentation, Communications Equipment, Protected Field-Bus Interface.
Industrial Automation Data Bus
The SN65HVD75D fits high-speed industrial automation links because it combines a 3.3 V supply with 20 Mbps half-duplex RS-485 operation and IEC ESD-protected bus pins. Its 5 V-tolerant logic inputs allow connection to both 3.3 V and 5 V controllers, which helps bridge controller generations without changing the transceiver package. Install it at the bus endpoint with controlled differential routing, and avoid long unterminated stubs. The -40°C to 125°C rating also supports industrial temperature ranges, although the final system still requires applicable surge, grounding, and EMC validation.
推薦
Factory Sensor and Controller Network
A SN65HVD75D can connect distributed sensors, actuators, and machine controllers over a shared RS-485 bus when the design benefits from a 20 Mbps signaling rate. The differential driver and receiver support a balanced network, while half-duplex operation conserves wiring by sharing one bus pair. The 5 V-tolerant inputs ease interfacing with legacy controllers, and IEC ESD protection improves robustness at exposed connectors. Designers should still define termination, common-mode range, grounding, fault protection, and stub length from the complete datasheet and installed-cable characteristics.
推薦
Building Automation Communication
The SN65HVD75D is appropriate for controller links in building automation equipment where a compact RS-485 interface and faster signaling are useful. Its 20 Mbps capability provides headroom for controller and status traffic, while the 8-pin SOIC package simplifies board-level integration. The 5 V-tolerant logic interface can simplify connections to 3.3 V and 5 V building controllers, and the -40°C to 125°C range supports varied enclosure temperatures. Commissioning should verify surge and ESD requirements, bus topology, termination, and isolation strategy for field-side wiring.
推薦
Industrial Instrumentation
The SN65HVD75D can serve as the communication interface in measurement and instrumentation equipment that exchanges data over RS-485. Its 20 Mbps rate supports short, high-speed links or heavier software traffic compared with slower transceivers, while the differential receiver is suited to noisy industrial environments. IEC ESD protection on the bus pins adds useful defense for cables connected through enclosure panels. For accurate measurements, keep the transceiver supply and analog circuitry appropriately partitioned, use a clean 3.3 V source such as the recommended TPS76333, and confirm common-mode limits in the final installation.
推薦
Communications Equipment
The SN65HVD75D supports compact communications equipment that uses a point-to-point or multidrop half-duplex RS-485 link. The 3.3 V operating supply suits modern mixed-signal systems, and the 5 V-tolerant inputs allow interoperability with older controller logic. At 20 Mbps, the device is appropriate for short links or systems requiring high burst throughput, provided cable loss and reflections are controlled. Place the 100 nF ceramic supply capacitor close to the device, route the differential pair consistently, and validate EMC performance at the enclosure interface.
推薦
Protected Field-Bus Interface
The SN65HVD75D is suitable for field-bus nodes requiring a 3.3 V transceiver with IEC ESD-protected bus pins. Its differential signaling enables communication over balanced cabling, and the 20 Mbps rate supports demanding equipment links. For isolated designs, the manufacturer datasheet references the SN6501 for isolated power-supply architectures, while a local 3.3 V regulator such as the TPS76333 can serve non-isolated nodes. ESD protection should not be treated as a substitute for surge protection, fuses, or grounding, so external protection must be selected according to the installation hazard level.
推薦
推薦產品摘要
工程參考資料，適用於 SN65HVD75D — 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 | SN65HVD72D | SN65HVD73D | SN65HVD74D |
|---|---|---|---|---|
| Package | 8-pin SOIC (D) | 8-pin SOIC (D) | 8-pin SOIC (D) | 8-pin SOIC (D) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Type | Half-duplex RS-485 transceiver | RS-485 transceiver | RS-485 transceiver | RS-485 transceiver |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
主要差異化特點
- Verified 20 Mbps signaling option (對比SN65HVD72D)
- IEC ESD-protected bus interface (對比SN65HVD73D)
- Wide industrial temperature coverage (對比SN65HVD74D)
- Mixed-voltage controller compatibility (對比SN65HVD72D)
設計說明
Place a 100 nF ceramic bypass capacitor as close as practical to the transceiver supply pins. According to the Texas Instruments manufacturer datasheet, buffering each supply with this capacitor supports reliable operation at all supported data rates and supply voltages. Route the capacitor directly to the device ground reference without long traces, and use the recommended TPS76333 when a dedicated 3.3 V regulator is required.
Route the RS-485 driver and receiver connections as a tightly coupled differential pair, maintain a consistent impedance throughout the board, and minimize vias and stubs. The SN65HVD75D is a half-duplex device, so the direction-control and bus-enable design must prevent uncontrolled driver contention. Keep the communication interface away from noisy switching nodes and provide a clear return-current path.
Do not treat IEC ESD protection as a complete surge-protection strategy. The SN65HVD75D protects bus pins against specified ESD events, but cable transients, ground-potential differences, and industrial surge hazards may require external protection. Confirm the common-mode voltage range, receiver thresholds, fail-safe behavior, termination strategy, and node grounding before releasing a field-connected industrial design.
Use the SN65HVD75D 5 V-tolerant logic inputs to simplify mixed-controller interfaces, but do not assume every input voltage is equally noise-immune. Keep driver-enable and receiver-enable traces short and away from the differential bus pair. If galvanic isolation is required, the manufacturer datasheet identifies the SN6501 as an isolated power-supply reference; suitable isolation components and barrier-layout practices must still be evaluated separately.
合規資訊
The supplied verified results do not extract explicit compliance declarations. No RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals claim has been inferred from the general product description.