SN65HVD24D Extended Common-Mode RS-485 Transceiver | Texas Instruments
MPN： SN65HVD24D ✗ 停產SN65HVD24D 概覽
An RS-485 transceiver is an interface IC that combines a differential line driver with a differential receiver. It converts logic-level signals to and from balanced RS-485 bus signals, placing the transmitted information onto a pair of conductors while rejecting common-mode noise picked up along the cable. Within the interface hierarchy, the SN65HVD24D is a differential bus transceiver, an interface circuit, and a semiconductor designed to connect logic-level equipment to industrial communication networks.
The SN65HVD2x family's key features include compliance with the TIA/EIA-485-A standard, extended common-mode operation, high electrostatic-discharge protection, wide receiver hysteresis, and failsafe behavior. Extended common-mode tolerance is particularly useful when communicating through electrically noisy or long installations where ground-potential differences can appear between connected systems. Wide receiver hysteresis improves decision reliability around the differential threshold, while failsafe operation defines the receiver output when the bus is idle or a driver is disconnected.
The SN65HVD24D integrates one half-rate RS-485 driver and one receiver in an 8-SOIC package. According to the manufacturer datasheet, the family is designed for long-cable applications and provides performance beyond typical RS-485 devices. These features make the device suitable for industrial automation, factory equipment, building controls, and other systems that distribute commands or measurements over substantial cable distances. The exact supply range, data rate, output-current limits, common-mode limits, and channel timing must be confirmed in the device specifications before a new design is released.
Typical uses include motor-drive command links, industrial controller networks, remote sensor interfaces, inverters, and supervisory control systems. In these applications, the transceiver places a balanced signal onto a twisted pair, while its receiver converts the differential voltage back into a logic signal for a microcontroller or field-programmable gate array. System designers should preserve the recommended biasing, termination, protection, and grounding arrangements because these external circuit decisions determine much of the achieved bus immunity and signal quality.
A primary design consideration is the relationship between cable length, data rate, topology, termination, and common-mode voltage. The SN65HVD24D's extended common-mode capability helps with ground-potential differences, but it does not remove the need for surge protection, cable routing discipline, or correct common-mode range analysis. Use the manufacturer datasheet pin-description and application information when assigning PCB tracks, and verify that protection devices do not distort the differential signal or exceed the transceiver's absolute-maximum limits.
This product page organizes the available SN65HVD24D information around the device function, package, application role, design considerations, and documented family features. It also identifies the limits of the current technical record: exact electrical ratings, pin functions, lifecycle details, and a qualified drop-in replacement set must be established from the complete manufacturer documentation before production release.
直接替換替代品，適用於 SN65HVD24D — 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。
此產品無可直接替換的替代品。
申請替代品SN65HVD24D 規格
| Product Type | RS-485 transceiver |
| Extended Common-Mode Family | SN65HVD2x |
| Driver and Receiver Count | 1 driver and 1 receiver |
| Supported Standards | RS-422 and RS-485 |
| TIA/EIA-485-A Compliance | Compliant |
| 封裝 | 8-pin SOIC |
| ESD Protection | High ESD protection |
| Receiver Hysteresis | Wide receiver hysteresis |
| Failsafe Behavior | Failsafe operation |
| RoHS 狀態 | RoHS compliant |
SN65HVD24D 8-pin soic 腳位配置指南
SN65HVD24D（8-pin soic 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： SN65HVD24D.
請參閱 資料表 以查看完整腳位配置。
典型應用
SN65HVD24D 適用於 6 應用s: Industrial Automation Fieldbus Links, Motor Drive Command Interfaces, Remote Sensor Networks, Building Control and HVAC Networks, Power Inverter Monitoring, Remote Instrumentation and Test Systems.
Industrial Automation Fieldbus Links
The SN65HVD24D fits industrial automation links that distribute commands and sensor data across factory-floor equipment. Its extended common-mode range helps the receiver tolerate voltage differences between grounded systems, while wide receiver hysteresis improves decision stability around the differential threshold. The device is placed between a controller or microcontroller and a twisted-pair bus. Correct termination, common-mode grounding, transient protection, and cable routing remain essential because transceiver robustness cannot replace a properly engineered bus network.
Motor Drive Command Interfaces
The SN65HVD24D is suitable for command and status links between a controller and an industrial motor drive. The differential RS-485 interface reduces susceptibility to common-mode noise compared with a single-ended connection, while the family's high ESD protection and failsafe operation support dependable behavior in electrically harsh equipment. Place the transceiver near the drive connector, use a protected twisted pair, and verify the drive's termination and biasing arrangement so that the bus remains compatible with its network topology.
Remote Sensor Networks
The SN65HVD24D can connect a remote sensor node to a central acquisition controller over a long differential cable. Its extended common-mode tolerance is useful when the sensor and controller have different ground potentials, and wide receiver hysteresis adds margin against interference coupled into the line. For sensor nodes that must limit idle bus power, verify the exact receiver and driver loading, supply current, and failsafe implementation from the manufacturer specifications before finalizing the node design.
Building Control and HVAC Networks
The SN65HVD24D is applicable to building-control networks that distribute thermostat, valve, or equipment-control information across long cable runs. Wide receiver hysteresis helps reject noise, and the extended common-mode range can improve tolerance of ground-potential differences between installed subsystems. Use shielded or twisted-pair cabling according to the installation environment, bond signal ground as appropriate for the site, and place surge protection at accessible cable entries without compromising the required differential impedance.
Power Inverter Monitoring
The SN65HVD24D supports monitoring and control communication in electrical power inverter equipment where a supervisory controller exchanges status or commands with a remote interface. Its fail-safe receiver behavior provides a defined state during bus inactivity, while high ESD protection adds useful robustness near industrial connectors. Validate the inverter's ground relationship, cable length, data rate, and protection components because those installation details determine whether the transceiver operates within its documented common-mode and absolute-maximum limits.
Remote Instrumentation and Test Systems
The SN65HVD24D can bridge an instrument controller to a remotely located measurement module when the interconnect is exposed to noise or potential ground differences. Differential signaling supports reliable communication, while wide hysteresis and failsafe operation reduce ambiguity from an idle or disconnected bus. Keep the receiver threshold behavior and output logic compatible with the acquisition system, and confirm the supported data rate over the intended cable length before selecting termination and protection components.
工程參考資料，適用於 SN65HVD24D — 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 |
|---|---|
| Brand | Texas Instruments |
| Package | 8-pin SOIC |
| Product Type | Extended common-mode RS-485 transceiver |
| Driver and Receiver Count | 1 driver and 1 receiver |
| Supported Interfaces | RS-422 and RS-485 |
| TIA/EIA-485-A Compliance | Compliant |
| ESD Protection | High ESD protection |
| Receiver Hysteresis | Wide receiver hysteresis |
| Failsafe Operation | Supported |
設計說明
Do not treat extended common-mode tolerance as permission to exceed the SN65HVD24D's absolute-maximum ratings. Confirm the supply and common-mode limits in the complete manufacturer datasheet, and calculate the worst-case difference between bus-side and logic-side ground potentials. Industrial cables can pick up large transient voltages, so use an appropriately rated surge-protection strategy at the connector.
Place the transceiver close to the RS-485 connector and route the differential pair away from switching nodes and high-current power paths. Keep the pair geometry consistent, minimize stubs, and provide a low-impedance ground reference. Follow the manufacturer's recommended decoupling arrangement and the complete pin-description table when assigning the 8-pin SOIC footprint.
Wide receiver hysteresis improves noise margin, but it does not eliminate reflections or excessive data-rate degradation. Match the bus termination, cable impedance, node topology, and data rate to the installation, and avoid star branches that create uncontrolled stubs. Validate the completed link with an oscilloscope using differential probing across the cable pair.
合規資訊
The SN65HVD24D listing identifies RoHS compliance and Pb-free status. The family datasheet states compliance with TIA/EIA-485-A. No specific AEC-Q100 qualification is identified for this device.