SN65HVD06DR - High-Output RS-485 Transceiver, 8-SOIC | Texas Instruments
MPN: SN65HVD06DR ✓ Hoạt độngSN65HVD06DR Tóm tắt
An RS-485 transceiver is a bus-interface IC that converts a single-ended TTL/CMOS logic signal into a differential voltage on a twisted-pair cable (typically designated A and B) and, in the opposite direction, converts a received differential signal back into single-ended logic. The differential signaling rejects common-mode noise and allows multi-drop networks of up to 32 (or more with unit-load variants) nodes across cable lengths up to 1200 m. RS-485 transceivers sit at the physical layer of industrial fieldbuses such as Modbus RTU, PROFIBUS, and DMX512, where robust noise immunity is essential.
Key features include a minimum 2.5 V differential output voltage into a 54 ohm load (exceeding the 1.5 V TIA/EIA-485-A minimum), 16 kV HBM ESD protection on bus pins, open-circuit, short-circuit, and idle-bus failsafe design, and 1/8th unit-load option that supports up to 256 nodes on the bus. Driver output slew-rate control limits EMI, and the wide 4.5 V to 5.5 V supply range suits both 5 V industrial logic and 3.3 V systems when paired with a charge pump or level shifter.
Internally the device uses a differential line driver with controlled slew rate, a window-comparator receiver with input hysteresis, and integrated failsafe biasing that forces a deterministic high output when the bus is idle, shorted, or open. The half-duplex configuration shares one differential pair between transmit and receive, controlled by a single DE/RE logic pin pair, reducing pin count versus full-duplex parts.
Typical applications include factory automation networks, motor drive control links, building automation (BACnet, Modbus), solar inverter monitoring, and any industrial point-to-point or multi-drop RS-485 link where high output drive and rugged ESD performance are valued.
When designing with this part, always include a 100 ohm termination resistor at each end of the bus and consider fail-safe biasing resistors if the cable can be left floating during commissioning. The high output drive increases quiescent current slightly compared to standard RS-485 parts, so factor thermal dissipation into densely populated multi-channel designs. This document synthesizes distributor pricing, drop-in alternatives, and practical design notes that complement the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho SN65HVD06DR — 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 SN65HVD06DR (cùng hình factor và footprint) — khác nhau ở Data Rate, Package, Operating Temperature, Protocol, RoHS Status.
SN65HVD05DR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SN65HVD07DR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SN65HVD06D
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SN75HVD06DR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX485ESA+
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SP485EEN-L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SN65HVD06DR Thông số kỹ thuật
| Chức năng | Transceiver |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| Tốc độ dữ liệu | 10 Mbps |
| Điện áp cung cấp | 4.5 V to 5.5 V |
| Nhiệt độ hoạt động | -40C to +85C |
| Minimum Differential Output Voltage | 2.5 V into 54 ohm load |
| Bus-Pin ESD Protection (HBM) | 16 kV |
| Unit Load | 1/8 (up to 256 nodes) |
| Failsafe | Open, short, and idle-bus |
| Standards Compliance | ANSI TIA/EIA-485-A, ISO 8482E |
| Hộp | 8-pin SOIC (D) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (unlimited) |
| Trạng thái RoHS | Compliant |
Cấu hình chân SN65HVD06DR
| Chân 1 | RO — Receiver output (push-pull, referenced to VCC/GND logic levels) |
| Chân 2 | RE — Receiver enable, active low (tie low to enable receiver, high to put RO in high-Z) |
| Chân 3 | DE — Driver enable, active high (tie high to enable driver, low to put bus outputs in high-Z) |
| Chân 4 | DI — Driver input (TTL/CMOS logic input to driver) |
| Chân 5 | GND — Ground |
| Chân 6 | A — Non-inverting bus line (driver output / receiver input) |
| Chân 7 | B — Inverting bus line (driver output / receiver input) |
| Chân 8 | VCC — Supply voltage (4.5 V to 5.5 V) |
Ứng dụng tiêu biểu
SN65HVD06DR phù hợp cho 7 Áp dụngs: Factory Automation RS-485 Networks, Motor Drive Control Links, Building Automation (BACnet/Modbus), Solar Inverter Monitoring, DMX512 Stage Lighting Control, Point-of-Sale and Access Control Networks, Industrial Sensor Multi-Drop Buses.
Factory Automation RS-485 Networks
The SN65HVD06DR is well suited to factory automation RS-485 networks where multi-drop Modbus RTU, PROFIBUS, or proprietary PLC link cables run between controllers, I/O blocks, and variable-frequency drives. Its 1/8 unit-load rating supports up to 256 nodes on a single bus, eliminating the need for repeaters in large cells. The greater-than-2.5 V differential output across a 54 ohm load provides additional noise margin for cables routed alongside motor windings and switching power stages, while 16 kV HBM ESD protection on the bus pins shields the IC during cable installation and field service. Place a 100 ohm termination at each cable end and consider fail-safe biasing resistors for long stubs.
Được đề xuất
Motor Drive Control Links
The SN65HVD06DR enables reliable half-duplex communication between motor controllers and servo drives on a single twisted pair. Its high-output driver maintains a robust differential signal across long motor-cable runs where common-mode noise from the PWM inverter can reach tens of volts. The 10 Mbps data rate supports real-time position feedback and high-speed command updates in CNC, robotics, and stepper/servo systems. The integrated open, short, and idle-bus failsafe prevents controller misinterpretation during cable disconnect events, critical for safety-rated machinery. Use shielded twisted pair and ground the shield at one end to control EMI from the drive inverter.
Được đề xuất
Building Automation (BACnet/Modbus)
The SN65HVD06DR is widely deployed in building automation controllers for BACnet MS-TP and Modbus RTU fieldbus links that connect HVAC controllers, lighting panels, and energy meters to a building management system. Its 4.5-5.5 V supply range matches the 5 V rails typical of commercial controllers, while 1/8 unit-load capability allows more than 256 devices on a single trunk - well beyond BACnet MS-TP limits of 50 nodes. The 16 kV HBM ESD protects the bus pins during installation when long unshielded cables are pulled through ceilings and conduit. The TI datasheet's failsafe biasing eliminates the need for external pull-up/pull-down resistors on idle cables.
Được đề xuất
Solar Inverter Monitoring
The SN65HVD06DR provides the RS-485 physical layer for solar inverter monitoring and string-combiner communications in photovoltaic installations. Its wide operating temperature range of -40C to +85C and high ESD rating handle the outdoor rooftop environment where cables can carry induced voltage from nearby lightning and DC arc-fault events. The 10 Mbps data rate accommodates fast polling of inverter telemetry (DC voltage, AC current, power, fault codes) from a central data acquisition unit. The high output drive maintains link integrity across hundreds of feet of cable runs between inverters and the gateway, even with partial shielding common in retrofit installations.
Được đề xuất
DMX512 Stage Lighting Control
The SN65HVD06DR serves as the DMX512 receiver/driver interface in stage lighting consoles, dimmer racks, and moving-light fixtures. DMX512 uses RS-485 electrical layers at 250 kbps, well within the HVD06's 10 Mbps capability, with the high differential output drive ensuring reliable signal transmission across the long daisy-chained cable runs typical of theater installations. The integrated failsafe prevents fixture misfiring when cables are disconnected mid-show, and 16 kV HBM ESD protects the bus during cable handling and rapid rig changes. The 1/8 unit-load rating allows fixture chains beyond the standard 32-node RS-485 limit, supporting large lighting rigs.
Được đề xuất
Point-of-Sale and Access Control Networks
The SN65HVD06DR enables RS-485 multi-drop networks in point-of-sale terminals, access control panels, and electronic shelf label systems where multiple low-speed peripherals share a single twisted pair back to a controller. The high output drive compensates for cable attenuation in retail floor installations where cable runs can exceed 100 m between terminals. The integrated failsafe eliminates spurious data when an individual terminal is powered down for service, and the 1/8 unit-load rating supports dense node counts for shelf-label rails. The robust ESD rating tolerates the static-prone retail environment with frequent cable disconnection.
Được đề xuất
Industrial Sensor Multi-Drop Buses
The SN65HVD06DR is an excellent fit for industrial 4-20 mA replacement and digital sensor networks using RS-485 multi-drop topologies. Temperature, pressure, flow, and level sensors in process plants can be daisy-chained on a single twisted pair, with each sensor node containing an HVD06 transceiver, a microcontroller, and sensor signal conditioning. The 1/8 unit-load rating supports up to 256 sensors on one cable, eliminating expensive analog home-run wiring. The high differential output drive maintains signal integrity in electrically noisy plant environments near VFDs and large motors, while the integrated failsafe prevents false readings during cable faults.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SN65HVD06DR — 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 | SN65HVD05DR | SN65HVD07DR | SN75HVD06DR | MAX485ESA+ | SP485EEN-L |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Maxim Integrated | MaxLinear |
| Package | 8-SOIC (D) | 8-SOIC (D) - same | 8-SOIC (D) - same | 8-SOIC (D) - same | 8-SOIC - same | 8-SOIC - same |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Unit Load | 1/8 (256 nodes) | 1/8 (256 nodes) | 1/8 (256 nodes) | 1/8 (256 nodes) | 1 (32 nodes) | 1 (32 nodes) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | 0C to +70C | -40C to +85C | -40C to +85C |
| Failsafe | Open/Short/Idle | Open/Short/Idle | Open/Short/Idle | Open/Short/Idle | Open/Short/Idle | Open/Short |
Bảo phân biệt quan trọng
- 256-node bus capacity via 1/8 unit load (vsMAX485ESA+)
- 16 kV HBM bus-pin ESD protection (vsSP485EEN-L)
- High differential output voltage for noise margin (vsSN65HVD05DR)
Ghi chú thiết kế
Place 100 ohm termination resistors at each end of the RS-485 bus, as close as possible to the bus pins (A and B) of the end-of-line transceivers. Use a 1% tolerance resistor to minimize reflection. For multi-drop buses with stubs, keep stub lengths shorter than 1/10 of the driver's rise time to prevent reflections. Route the A and B traces as a 100 ohm differential pair (typically 12-15 mil traces with 8 mil gap on FR-4) and avoid sharp 90-degree bends. Maintain a continuous ground plane beneath the traces and keep the bus away from switching power and clock signals to preserve noise margin.
Do not leave RE floating - tie it either high (disable receiver) or low (enable receiver) via a 10 kohm pull-up or pull-down resistor. The DE pin must also be controlled; never leave it floating. When connecting the SN65HVD06DR to a 3.3 V microcontroller, note that the DI input has TTL thresholds that work correctly at 3.3 V logic levels, but the RO output swings to VCC (5 V). If the MCU cannot tolerate 5 V on its RX pin, add a series resistor or level translator. The A and B bus pins are not tolerant to voltage beyond the absolute maximum ratings specified in the datasheet - add external TVS diodes for outdoor or long-cable installations.
The SN65HVD06DR's high-output driver (greater than 2.5 V differential into 54 ohm) provides excellent noise margin but generates faster edges than standard RS-485 parts. For very long cables (>300 m) or EMI-sensitive environments, consider the SN65HVD07DR instead - same footprint, slower edges, lower EMI. Estimated: at 10 Mbps with 5 ns edge rate, the 10th-harmonic energy is around 100 MHz, so route the bus away from sensitive analog circuits and consider shielded twisted pair (STP) with the shield grounded at one end. Always include fail-safe biasing resistors (typically 680 ohm pull-up on A and 680 ohm pull-down on B to a defined reference) if any node on the bus may be powered down while others are transmitting.
The SN65HVD06DR is not a power device and thermal management is rarely a concern - the SOIC-8 package dissipates only tens of milliwatts under normal RS-485 operation. However, in fault conditions (bus shorted to a high-voltage DC supply), the internal driver current-limit and thermal shutdown protect the die but may still cause the package to enter thermal shutdown. Estimated: at 5 V supply and 250 mA short-circuit current (typical limit), the die dissipates 1.25 W briefly before protection circuits reduce current. Provide adequate copper pour on the GND pin and avoid placing the IC near other heat sources for reliable fault recovery.
Thông tin tuân thủ
RoHS and REACH compliant per TI product page. AEC-Q100 not applicable - this is a commercial/industrial grade part; for automotive RS-485, use SN65HVD06-Q1 variant. Halogen-free per TI packaging materials disclosure.