SN65HVD76D - 50Mbps Full-Duplex RS-485 | Texas Instruments
MPN: SN65HVD76D ✓ Hoạt độngSN65HVD76D Tóm tắt
An RS-485 transceiver combines a differential line driver and differential receiver to communicate reliably over noisy, long-distance industrial buses. The SN65HVD76 family supports both RS-485 and RS-422 applications, while its full-duplex architecture provides simultaneous transmit and receive paths through separate differential pins. It operates from a single 3.3 V power rail, simplifying integration with 3.3 V controllers, sensors, gateways, and test equipment.
The principal features include a 50 Mbps maximum data rate, 1/8 unit-load receiver operation for up to 256 nodes, a 70 mV receiver hysteresis, and separate enable controls. According to the Texas Instruments product page, the driver enable is active high and the receiver enable is active low. Disabling both functions can reduce standby current to less than 5 uA, making the device useful in low-power distributed systems.
Bus protection includes greater than 30 kV human-body-model protection and greater than 12 kV IEC 61000-4-2 contact-discharge protection, together with greater than 4 kV IEC 61000-4-4 fast-transient burst protection. These ratings help protect the transceiver in electrically noisy environments, although they do not eliminate the need for correct common-mode grounding, cable selection, and termination practices.
Typical applications include industrial RS-485 links, factory automation equipment, building controls, instrumentation, and high-speed data acquisition. Full-duplex operation is particularly appropriate when continuous receiving is required while the controller also transmits status, configuration, or diagnostic data. The 14-pin SOIC format also supports conventional surface-mount assembly and thermal design.
For a new layout, place the transceiver and its protection or bypass components near the bus connector, maintain a continuous ground reference with the cable, and apply termination only where required by the network topology. Verify that the selected logic controller can tolerate the receiver output levels and that the bus does not exceed the device's electrical limits.
This page combines the exact device specifications, practical RS-485 design guidance, application fit, and package-level comparison information. It also distinguishes true board-level drop-in options from related family members whose enable behavior or transceiver configuration differs, helping engineers avoid selecting a substitute that requires schematic or layout changes.
Bộ thay thế dễ dàng lắp đặt cho SN65HVD76D — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với SN65HVD76D (cùng hình factor và footprint) — khác nhau ở Driver Enable, Receiver Enable, Receiver Hysteresis, Package, Product Type.
SN65HVD70DGSR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SN65HVD1476DR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SN65HVD76DR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SN65HVD76D Thông số kỹ thuật
| Product Type | Full-duplex RS-485 transceiver |
| Điện áp cung cấp | 3.3 V |
| Supply Voltage Range | 3 V to 3.6 V |
| Maximum Data Rate | 50 Mbps |
| Number of Drivers/Receivers | 1/1 |
| Duplex Mode | Full-duplex |
| Supported Protocols | RS-485 and RS-422 |
| Receiver Hysteresis | 70 mV |
| Receiver Unit Load | 1/8 unit load |
| Maximum Bus Nodes | 256 nodes |
| IEC Contact Discharge Protection | Greater than 12 kV |
| Human Body Model Protection | Greater than 30 kV |
| IEC Fast Transient Burst Protection | Greater than 4 kV |
| Low Standby Current | Less than 5 uA with driver and receiver disabled |
| Driver Enable | Active high |
| Receiver Enable | Active low |
| Khoảng nhiệt độ hoạt động | -40 C to 125 C |
| Hộp | 14-pin SOIC (D) |
| Kiểu lắp đặt | Surface mount |
Hướng dẫn cấu hình chân SN65HVD76D 14-pin soic (d)
Cấu hình chân cho SN65HVD76D (14-pin soic (d) gói). Số thứ tự chân, chức năng và sơ đồ kết nối được xác định trong tài liệu thông số kỹ thuật của nhà sản xuất. Tham khảo nó để biết footprint và hướng dẫn hàn chính xác.
Không có dữ liệu chân cụ thể sẵn có cho SN65HVD76D.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
SN65HVD76D phù hợp cho 6 Áp dụngs: Industrial RS-485 Control Networks, Factory Data-Acquisition Equipment, Building and HVAC Controls, High-Speed Instrumentation, Communication Gateways and Converters, Portable Test and Measurement.
Industrial RS-485 Control Networks
The SN65HVD76D fits 3.3 V industrial control networks that require reliable full-duplex communication over long cable runs. Its 50 Mbps maximum data rate supports high-speed command and telemetry traffic, while 1/8 unit loading permits up to 256 nodes according to the Texas Instruments family documentation. Separate active-high driver and active-low receiver enables allow the controller to control each direction independently. Greater than 12 kV IEC contact-discharge protection adds robustness in electrically noisy factory environments, although the bus still requires correct grounding, shielding, and topology-specific termination.
Được đề xuất
Factory Data-Acquisition Equipment
The SN65HVD76D can connect a data-acquisition controller to distributed sensors, analyzers, or production equipment using a 3.3 V full-duplex RS-485 link. Its 50 Mbps capability allows rapid transfer of sampled and diagnostic data, and the 70 mV receiver hysteresis helps distinguish valid differential signals in noisy environments. The 1/8-unit-load receiver supports as many as 256 nodes, making it useful for densely instrumented production cells. Place the transceiver near the connector and preserve a continuous ground reference to reduce common-mode voltage and susceptibility to transient noise.
Được đề xuất
Building and HVAC Controls
The SN65HVD76D is suitable for low-voltage building-control networks carrying configuration, status, and diagnostic data between controllers and distributed field modules. Full-duplex operation lets a controller receive continuous feedback while transmitting updates, and the less-than-5-uA standby current available when both functions are disabled supports power-conscious modules. The 3.3 V supply and 14-pin SOIC package suit compact controller boards. Cable routing and grounding remain essential because internal ESD protection does not replace correctly installed surge and common-mode protection at exposed building boundaries.
Được đề xuất
High-Speed Instrumentation
The SN65HVD76D supports high-speed instrumentation where a laboratory instrument must exchange continuous measurement and control data with a remote host. The 50 Mbps rate reduces protocol overhead in burst transfers, while separate transmit and receive paths avoid time-sharing one half-duplex bus. The receiver's 70 mV hysteresis supports reliable detection of small differential signals, and the broad -40 C to 125 C operating range supports industrial laboratory equipment. For bench and rack installations, use a controlled cable impedance and shield, and place optional bus protection close to the connector.
Được đề xuất
Communication Gateways and Converters
The SN65HVD76D can serve as the RS-485 side of a protocol gateway or industrial communication converter that interfaces a 3.3 V processor or controller to legacy equipment. Full-duplex communication permits simultaneous host traffic and upstream data collection, and the transceiver's 50 Mbps capability provides headroom for high-rate aggregated messages. The 1/8-unit-load option allows more nodes than a standard unit-load receiver without adding an external repeater. Validate isolator, ground-potential, and surge-protection requirements at the enclosure boundary because the on-chip ESD ratings alone do not define system-level immunity.
Được đề xuất
Portable Test and Measurement
The SN65HVD76D fits portable test equipment that must connect reliably to remote probes, fixtures, or service equipment over a 3.3 V RS-485 link. Its less-than-5-uA standby current when the driver and receiver are both disabled helps limit drain in intermittently operated instruments, while 50 Mbps supports rapid waveform-adjacent data transfer and configuration downloads. The 14-pin SOIC package is compatible with standard surface-mount assembly. Keep the cable connector and transceiver on the same ground reference where possible, and use adequate transient protection for field-accessible cables.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SN65HVD76D — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | SN65HVD70D | SN65HVD1476DR | SN65HVD76DR |
|---|---|---|---|---|
| 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) |
| Product Type | 1/1 full-duplex RS-485 transceiver | RS-485 transceiver | Single transmitter/receiver RS-485 transceiver | 1/1 full-duplex RS-485 transceiver |
Bảo phân biệt quan trọng
- Full-duplex operation with independent enables (vsSN65HVD1476DR)
- High node density with reduced loading (vsSN65HVD70D)
- No functional change between ordering suffixes (vsSN65HVD76DR)
Ghi chú thiết kế
Place the SN65HVD76D close to the RS-485 connector and route the differential bus as a short, tightly coupled pair. Keep the transceiver ground, connector ground, and cable shield connected according to the system grounding strategy. Place any external transient-protection devices directly beside the connector so surge current is diverted before reaching the IC. Avoid long unprotected stubs because they can behave as unterminated transmission lines and introduce reflections.
Do not infer enable polarity from a generic RS-485 transceiver. The SN65HVD76 uses an active-high driver enable and an active-low receiver enable. Confirm controller reset states so the driver is not accidentally enabled while another node transmits. If the design uses standby operation, drive both enables into their disabled states, where the family specification permits standby current below 5 uA.
Use a termination strategy appropriate to the physical network rather than placing a resistor at every node. Termination belongs at the two physical ends of the main trunk, and stubs should be minimized. Maintain compatible common-mode range and ground potential across the bus. The SN65HVD76D offers 50 Mbps operation and 70 mV receiver hysteresis, but reliable communication still depends on controlled impedance, cable quality, grounding, and avoidance of excessive stub lengths.
Thông tin tuân thủ
The verified product information confirms the industrial temperature range and IEC protection ratings but does not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. IEC 61000-4-2 and IEC 61000-4-4 are bus-protection test standards, not product compliance certifications.