SN65HVD82D - 5V RS-485 Transceiver with IEC ESD | TI
料号： SN65HVD82D ✓ 量产中SN65HVD82D 概述
An RS-485 transceiver is an interface IC that converts logic-level signals into differential bus signals and converts received differential signals back into logic levels. As a member of the RS-422 and RS-485 interface hierarchy, it supports noise-resistant, point-to-point or multipoint communication over longer cable runs than conventional single-ended interfaces. The half-duplex arrangement allows a connected node to transmit and receive, but not simultaneously, on the same pair of conductors.
The SN65HVD82D operates from a single 5-V supply and supports data rates up to 250 kbps according to the available FindIC product listing. Its bus pins are designed for robust ESD event handling, with manufacturer and distributor descriptions identifying Human-Body Model, Air-Gap Discharge, Contact Discharge, and IEC ESD protection. The 8-pin SOIC package provides a conventional surface-mount form factor for industrial communication equipment.
Internally, the device combines a differential driver with a differential receiver rather than implementing two unrelated interface channels. This arrangement supports bidirectional data transfer when the design uses a direction-control signal, bus multiplexing, or an application-specific enable strategy. Because RS-485 is a differential bus, correct termination, biasing, grounding, and cable routing remain central to achieving reliable communication.
Typical uses include industrial sensor networks, factory automation equipment, building-control interfaces, process-monitoring systems, and communications equipment that connects a controller to remote nodes. The device is also relevant to laboratory and test systems where a compact 5-V RS-485 interface is required close to a digital controller.
When laying out a board around the SN65HVD82D, place its decoupling capacitor close to the supply pins and route the differential bus as a tightly coupled pair. External protection may still be appropriate when exposed cables or severe industrial transients are expected, because integrated ESD protection does not remove the need for a correctly engineered cable and grounding system.
This page combines the verified manufacturer, distributor, and cross-reference information with a practical view of package compatibility, pricing availability, ESD considerations, and application guidance. It also distinguishes verified facts from electrical details that still require confirmation in the latest manufacturer datasheet before final design release.
直接替换替代料： SN65HVD82D ——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： SN65HVD82D （相同外形与封装尺寸） ——差异在于 Package, Data Rate, ESD Protection, Operating Temperature, Product Type.
SN65HVD20D
✅ 直接替换联系询价
查看数据手册 →SN65HVD22D
✅ 直接替换📋 参考替代料（不在目录中）
SN65HVD07D
✅ 直接替换📋 参考替代料（不在目录中）
SN65HVD888
✅ 直接替换📋 参考替代料（不在目录中）
SN65HVD06D
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SN65HVD82D 规格参数
| Product Type | RS-422/RS-485 half-duplex transceiver |
| 电源电压 | 5 V |
| 数据速率 | 250 kbps |
| Interface Standard | RS-422/RS-485 |
| Driver and Receiver Count | 1 differential driver and 1 differential receiver |
| 封装 | 8-pin SOIC |
| Package Pin Count | 8 pins |
| 工作温度 | -40 C to +85 C |
| ESD Protection | IEC ESD protection |
| ESD Model Coverage | Human-Body Model, Air-Gap Discharge, and Contact Discharge |
| 安装类型 | Surface Mount |
| Transceiver Configuration | 1/1 transceiver |
| Operating Mode | Half Duplex |
SN65HVD82D 8 pins 引脚配置指南
SN65HVD82D（8 pins 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： SN65HVD82D.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SN65HVD82D 适用于 6 应用s: Factory Automation Sensor Networks, Industrial Process Monitoring, Building Control Networks, Remote Environmental Monitoring, Laboratory and Test Equipment, Security and Access-Control Systems.
Factory Automation Sensor Networks
The SN65HVD82D fits factory automation links that distribute commands and collect measurements over a shared differential bus. Its 5-V supply and 250-kbps capability support controller-to-sensor communication at a rate suitable for many monitoring and control networks. The device combines one differential driver and one differential receiver in an 8-pin SOIC, reducing the interface footprint while preserving noise-resistant differential signaling. In a multidrop installation, the engineer must verify address or direction control, provide proper bus termination and biasing, and confirm common-mode limits for every attached node.
推荐
Industrial Process Monitoring
The SN65HVD82D can connect a controller to remote pressure, temperature, or process-monitoring equipment over an RS-485 network. Differential signaling is useful in industrial environments because it improves noise immunity compared with a single-ended interface, while the documented IEC ESD protection adds useful protection at the interface. The 250-kbps rate is more than adequate for many slow measurement loops. Deployment still requires careful grounding, twisted-pair routing, surge protection for severe transients, and verification that all devices on the bus share compatible electrical limits.
推荐
Building Control Networks
The SN65HVD82D is suitable for building-control equipment that distributes heating, ventilation, lighting, or access-control commands over an RS-485 backbone. Its 5-V operation simplifies integration with embedded controllers, while the 8-pin SOIC package supports compact board layouts. The half-duplex arrangement permits bidirectional traffic when the system provides an enable-control strategy, and differential bus signaling helps maintain communication integrity across building wiring. Installations should include correct bus termination and biasing, isolate long cable routes from high-energy transients, and test grounding arrangements in metal distribution cabinets.
推荐
Remote Environmental Monitoring
The SN65HVD82D can serve as the communications interface in a remote environmental-monitoring station that reports readings from air-quality, weather, or soil sensors. A controller can use the transceiver's 250-kbps capability for periodic telemetry over a balanced cable pair, while its IEC ESD protection is relevant where cables connect to field-installed equipment. The design should use a shielded or twisted differential pair, maintain a common ground reference where required by the interface topology, and include external surge protection if the installation is exposed to lightning or large switching transients.
推荐
Laboratory and Test Equipment
The SN65HVD82D is useful in laboratory instruments and test systems that need to communicate with remote fixtures or automated test equipment over an RS-485 bus. Its 250-kbps rate supports command transfer and status reporting, while the compact 8-pin SOIC package leaves board area for the instrument's primary functions. Because test equipment may connect to cables with uncertain fault exposure, the engineer should confirm the exact bus pins, protection configuration, and common-mode ratings in the datasheet. External protection and controlled grounding remain recommended for bench fixtures connected to long or poorly terminated cables.
推荐
Security and Access-Control Systems
The SN65HVD82D can support distributed access-control readers, door controllers, or camera-station interfaces that communicate over an RS-485 industrial network. Differential signaling helps reject common-mode noise in buildings containing elevators, motors, and switching power supplies, while IEC ESD protection adds resilience at the external bus connection. The 5-V supply and 250-kbps rate align with many low-bandwidth identification systems. Engineers should use twisted-pair cabling, define termination and fail-safe biasing for the complete network, and consider external surge protection where reader wiring exits the controlled building environment.
推荐
推荐产品汇总
工程参考数据： SN65HVD82D ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | SN65HVD20D | SN65HVD22D | SN65HVD07D | SN65HVD888 | SN65HVD06D |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Interface Standard | RS-422/RS-485 | RS-485 | RS-485 | RS-485 | RS-485 | RS-485 |
关键差异点
- Documented IEC-oriented ESD protection for the external bus interface （对比 SN65HVD20D)
- Single integrated differential driver and differential receiver （对比 SN65HVD07D)
- Documented 250-kbps operating rate and industrial temperature range （对比 SN65HVD888)
- Explicit 5-V RS-422/RS-485 positioning （对比 SN65HVD22D)
设计说明
Place the local supply-decoupling capacitor immediately adjacent to the transceiver's supply and ground pins. Route the differential driver and receiver connections as a tightly coupled pair over uninterrupted ground planes, minimize stub lengths, and keep the bus connector away from switching nodes. Because the available excerpts do not provide the exact pin numbers or recommended capacitor value, confirm both in the current manufacturer datasheet before releasing the PCB layout.
Do not treat the integrated IEC ESD rating as a complete industrial surge-protection solution. Determine whether the installation uses long outdoor cables, unbonded building wiring, motors, or switching devices that can produce larger transients. In those cases, add properly coordinated external protection, establish a suitable grounding strategy, and verify that protection-device capacitance does not destabilize the RS-485 bus or reduce usable communication margin.
Termination and fail-safe biasing must be evaluated at the network level rather than copied independently onto every node. Place termination only at the physical ends of the main bus, normally in a 120-ohm configuration when the complete network matches the cable impedance. Use one controlled bias point where required and avoid excessive bias voltage. Confirm the actual transceiver enable and fail-safe configuration in the manufacturer datasheet before finalizing bus population and direction control.
For half-duplex operation, ensure that software and hardware never enable the driver while the receiver is expected to receive from another node. Multiple drivers can conflict on the bus and produce excessive current. Verify turnaround timing, any external direction-control transistor or driver circuit, and the receiver's behavior during bus contention. These details are essential because the supplied search excerpts do not expose the exact enable pins or their active levels.
合规信息
The verified excerpts identify IEC ESD protection but do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. No compliance claim has been inferred.
