SN65HVD54D - 5 Mbps Full-Duplex RS-485 | Texas Instruments
MPN： SN65HVD54D ✓ 啟用中SN65HVD54D 概覽
An RS-485 transceiver is an interface integrated circuit that combines a differential line driver and differential receiver for balanced digital communications. It belongs to the RS-422/RS-485 transceiver hierarchy within interface ICs, where the driver translates logic-level signals into differential bus voltage and the receiver converts differential bus voltage back into a logic-level signal. Full-duplex operation provides separate paths for transmission and reception, making the SN65HVD54D suitable for systems that cannot share the same bus conductors in both directions.
The SN65HVD54D provides one driver and one receiver, with independent enables that allow the system to place either side into a low-power state. Its high-output architecture is intended for demanding balanced-line links, while the selectable driver edge rates let engineers optimize signaling behavior for 1 Mbps, 5 Mbps, or faster communication links. The 1/8-unit-load receiver option can support up to 256 nodes, reducing the loading burden in large multi-node industrial systems.
Bus-pin ESD protection exceeding 15 kV HBM adds an important ruggedness margin where cables and external connectors are exposed to electrostatic discharge. The device operates across the -40 °C to +85 °C temperature range in the SN65HVD54D ordering option. Its separate full-duplex driver and receiver structure is particularly useful when the transmitting and receiving nodes must remain active simultaneously.
Typical uses include industrial factory automation, building-control networks, industrial instrumentation, motor-control systems, process monitoring, and other full-duplex RS-485 links. The 5 Mbps capability supports factory-floor communication, while the standby function can reduce consumption when a node is not communicating. Component placement and termination remain important because the transceiver does not eliminate the need for a balanced cable, appropriate bus topology, and correctly engineered termination.
Designers should verify enable polarity in the host logic, place the device close to the bus connector, and provide protection appropriate to the installation environment. The internal high-impedance state supports controlled bus participation, but software and fault-management circuitry must still prevent multiple transmitters from driving the same bus at the same time.
This page consolidates verified manufacturer and distributor information, package details, lifecycle attributes, replacement guidance, and application-oriented engineering context. It also distinguishes documented drop-in family options from alternatives that may require different packages or interface behavior, helping engineers shorten component-selection and PCB-validation work.
直接替換替代品，適用於 SN65HVD54D — 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： SN65HVD54D （相同外形與佔位） — 差異在於 Product Type, Maximum Bus Nodes, Package, Standby Current, Operating Temperature Range.
SN65HVD53D
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →SN65HVD55D
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →SN65HVD51D
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →SN65HVD54D 規格
| Product Type | High-output full-duplex RS-485 driver and receiver |
| Driver and Receiver Count | 1 transmitter and 1 receiver |
| Supported Standards | RS-422 and RS-485 |
| Maximum Signaling Rate | 5 Mbps |
| 供應電壓 | 5 V |
| Receiver Unit Load | 1/8 unit load |
| Maximum Bus Nodes | 256 nodes |
| Bus-Pin ESD Protection | Exceeds 15 kV HBM |
| Selectable Driver Transition Rates | Options for 1 Mbps, 5 Mbps, and 25 Mbps signaling rates |
| Standby Current | 1 µA |
| Driver Enable | Active high |
| Receiver Enable | Active low |
| 工作溫度 | -40 °C to +85 °C |
| 封裝 | 14-pin SOIC (D) |
| 安裝類型 | Surface mount |
SN65HVD54D 14-pin soic (d) 腳位配置指南
SN65HVD54D（14-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： SN65HVD54D.
請參閱 資料表 以查看完整腳位配置。
典型應用
SN65HVD54D 適用於 6 應用s: Industrial Factory Automation, Industrial Sensor Networking, Process Monitoring and Control, Building Control Networks, Motor Control and Equipment Interfaces, High-Speed Balanced Data Communication.
Industrial Factory Automation
The SN65HVD54D fits full-duplex industrial automation links that operate on a 5 V supply and require data rates up to 5 Mbps. Its separate driver and receiver permits simultaneous command transmission and sensor-response reception without sharing the same pair of bus wires. The 1/8-unit-load option supports as many as 256 nodes, making the device useful in factory systems where many field modules share a balanced backbone. Bus-pin ESD protection exceeding 15 kV HBM adds protection at connector-facing circuitry, although the final design still needs correctly engineered cabling, topology, grounding, and surge protection.
Industrial Sensor Networking
The SN65HVD54D can connect distributed industrial sensors to a monitoring controller over a dedicated full-duplex RS-485 link. A maximum signaling rate of 5 Mbps allows the network to carry frequent measurements while maintaining separate transmit and receive paths. The receiver's 1/8-unit-load option can reduce bus loading when up to 256 nodes are present. Design engineers should select balanced cable, termination appropriate to the topology, and external protection based on the distance and installation environment, because the transceiver's internal ESD rating does not replace system-level surge and lightning protection.
Process Monitoring and Control
Process-monitoring systems benefit from the SN65HVD54D when a controller must continuously exchange commands and measurements with remote process equipment. Full-duplex operation removes the need for time-shared half-duplex bus control and can simplify deterministic control-loop software. The 5 Mbps capability supports relatively high update rates, while the 1 µA standby mode can reduce consumption when communication is intentionally disabled. The operating range of -40 °C to +85 °C suits many industrial environments, but signal integrity must be validated against the actual cable length, baud rate, termination, and common-mode conditions.
Building Control Networks
The SN65HVD54D is applicable to full-duplex building-control networks used for HVAC equipment, access controls, lighting controllers, and environmental monitoring. The separate transmit and receive channels simplify communication between a central controller and field panels, while the 5 Mbps rate provides substantial link capacity. The 1/8-unit-load receiver option is useful when numerous building-controller nodes share the bus. Because building environments can include long cable runs and multiple grounding points, engineers should verify cable length, topology, isolation requirements, protection networks, and grounding before approving the installation.
Motor Control and Equipment Interfaces
The SN65HVD54D can interface a controller with motor-control modules, drives, or industrial equipment over a dedicated differential bus. Its high-output, full-duplex architecture supports predictable transmit and receive operation, and the selectable transition-time options let engineers tune the link for 1 Mbps or 5 Mbps signaling environments. The 1/8-unit-load capability can accommodate larger equipment networks. The transceiver should be placed near the external connector, and the bus network should include suitable protection against motor-generated transients, ground-potential differences, and ESD at exposed interfaces.
High-Speed Balanced Data Communication
The SN65HVD54D supports balanced differential data communication up to 5 Mbps when the physical network is engineered for that rate. Full-duplex operation provides independent data paths, and the selectable driver transition times offer options associated with 1 Mbps, 5 Mbps, and 25 Mbps signaling requirements. At shorter distances and with suitable cabling, this architecture can support deterministic control traffic, data acquisition, and equipment-to-equipment links. High data rate does not remove channel-design requirements: impedance, termination, skew, reflections, grounding, and connector behavior must be validated using the complete cable and transceiver arrangement.
工程參考資料，適用於 SN65HVD54D — 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 | SN65HVD53D | SN65HVD55D | SN65HVD51D |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-pin SOIC (D) | 14-pin SOIC (D) | 14-pin SOIC (D) | 14-pin SOIC (D) |
主要差異化特點
- Documented 256-node loading capability (對比SN65HVD53D)
- Verified 5 Mbps signaling rate (對比SN65HVD55D)
- Documented bus-pin ESD robustness (對比SN65HVD51D)
設計說明
Place the SN65HVD54D close to the RS-485 connector and route the differential bus pair as a tightly coupled, impedance-controlled pair over the shortest practical distance. Keep the driver and receiver enable traces away from the bus conductors. The verified datasheet excerpts do not provide a complete layout or capacitance guideline, so final trace geometry, protection placement, grounding, and isolation must follow the current manufacturer datasheet and the characteristics of the selected cable.
Do not enable the driver while another transmitter is actively driving the same RS-485 bus. Although the SN65HVD54D provides independent driver and receiver enables, correct bus arbitration remains a system-level requirement. Also confirm the active-high driver-enable and active-low receiver-enable polarity in the host schematic and firmware. A reversed enable interpretation can leave the receiver disabled or prevent intentional driver shutdown even when the package and supply wiring are otherwise correct.
Use a balanced cable, a linear bus topology, and termination selected for the actual network impedance. The device supports signaling rates up to 5 Mbps and offers selectable transition-time options, but high edge speed can increase radiated emissions and reflections on unsuitable cables. External protection may be needed for industrial surge or lightning exposure; the documented bus-pin ESD protection exceeding 15 kV HBM should not be treated as a complete industrial surge-protection solution.
Decouple the 5 V supply locally and follow the manufacturer datasheet for the recommended capacitor type, voltage rating, and placement. Keep switching converters and high-current digital returns away from the transceiver's supply and ground connections to minimize noise coupling. Because the supplied excerpts do not include the specified capacitor values or operating limits, these items remain [DATA_NEEDED] and must be obtained from the current TI datasheet before layout release.
合規資訊
The supplied verified excerpts do not contain explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements for the SN65HVD54D. AEC-Q100 is treated as not applicable because the product is an industrial interface IC, not an automotive-qualified variant.